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Prepared by:

August 2006

Electrification of Village Shikarpur

Category Remote Plain Area (201 HH)

District : 24 South Pargana, West Bengal

Biomass Gasifier Based Electric Power Project (2x25 kW)

Alternate Hydro Energy CentreIndian Institute of TechnologyRoorkee-247 667

Govt. of India, New Delhi

Prepared by:

August 2006

Alternate Hydro Energy CentreIndian Institute of TechnologyRoorkee-247 667

Govt. of India, New DelhiGovt. of India, New Delhi

Electrification of Village Shikarpur

Category Remote Plain Area (201 HH)

District : 24 South Pargana, West Bengal

Biomass Gasifier Based Electric Power Project (2x25 kW)

TABLE OF CONTENTS

Page No. i. Foreward ii. Executive Summary iii Salient Features S1-S3 iv. Photographs P1-P10 CHAPTER – 1 BACKGROUND AND BASIC DATA 1.1 Introduction 1 1.2 Project Sponsor 1 1.3 Nodal Agency & Associated Organizations 1 1.4 Selection of Village for Model DPR 2 1.5 General Information – Village Shikarpur 2 1.6 Forest Around Shikarpur 4 1.7 Wood as Fuel 4 1.8 Forest Land Under Van Samiti 4 CHAPTER – 2 LOAD ASSESSMENT/ENERGY REQUIREMENT AND

INSTALLED CAPACITY

2.1 General 5 2.2 Power / Energy Requirement 5 CHAPTER – 3 RESOURCE AVAILABILITY AND MANAGEMENT 3.1 Biomass 9 3.2 Biomass Management 10 3.3 Resources of Operation and Maintenance 11 3.4 Monetary Resource 11 3.5 Nodal Agency for Installation of the Plant 11 3.6 O & M Activities 11

CHAPTER – 4 CIVIL WORKS

4.1 Introduction 12 4.2 Civil Works 12 4.3 Construction 13 4.4 Water Supply System and Room 13 4.5 Miscellaneous 14 CHAPTER – 5 POWER GENERATION EQUIPMENT 5.1 Types of Gasifier 15 5.2 Electro-Mechanical Equipment 17 5.3 Process of Gasifier 20 5.4 Maintenance Manual and Log Book 21 5.5 Proposed Spares 21

CHAPTER – 6 POWER EVACUATION AND DISTRIBUTION SYSTEM 6.1 Consumer Voltage Variation and Power Factor 22 6.2 Provision of ELCBs and Load Limitors 22 6.3 Lightning Protection 22 6.4 Distribution Plan 22 6.5 Isolators / Fuses / ELCBs 22 6.6 Load Limiters 23 6.7 Cables 23 6.8 Type of Poles 23 6.9 House Wiring 24 6.10 Temper Proofing 24 6.11 Maintenance Manual 24 6.12 Labels and Notices 24 6.13 Line Distribution System 25 6.14 Selection of Cable 25 CHAPTER – 7 TESTING & COMMISSIONING 7.1 Testing 26 7.2 Commissioning 26 7.3 Acceptance Tests at Site 26 CHAPTER – 8 PROJECT IMPLEMENTATION STRATEGY 8.1 General 27 8.2 Arrangement 27 CHAPTER – 9 CONSTRUCTION PROGRAMME 9.1 Pre-Construction Activities 29 9.2 Construction Activities/Period 29 9.3 Bio Mass Supply for the Plant 30 9.4 Contractual Period of O & M 30 CHAPTER – 10 ESTIMATES AND FINANCIAL ANALYSIS 10.1 Cost of the Plant and System 31 10.2 Funding for Construction of Plant 34 10.3 Financial analysis 34

CHAPTER – 11 OPERATION AND MAINTENANCE OF PLANT OF PLANT &

SYSTEM 11.1 General 39 11.2 Formation of Committee for Supervision of O & M 39

CHAPTER – 12 ENVIRONMENTAL IMPACT AND BENEFITS 12.1 Environmental Impacts 40 12.2 Benefits 40

DRAWINGS

i. Tentative Layout of Distribution Line in Village Shikarpur C-341-1 ii. Schematic Diagram and Indicative Plan Layout C-341- 2 iii. Plan and Sectional Elevation of Power Generation Plant C-341-3 iv. Biomass Store Shed and Open Yard C-341-4 v. Single Line Diagram E-341-1

AHEC/ Model DPR/ Plain 200(201) HH/BEP

FOREWORD (This Foreword is not part of the Model DPR) The Ministry of Non-Conventional Energy Sources, Government of India (MNES) have identified over 24,000 remote villages which are proposed to be electrified through small renewable energy sources e.g. Small Hydro Power, Biomass Gasification and Solar Photovoltaic Technology, so as to improve the well being of population living in the far flung isolated areas.

To make the Remote Village Electrification (RVE) programme successful, it is necessary that the planning, design, execution and operation and maintenance of RVE projects is efficient and reliable and also economical in the long run. MNES, vide letters number 13/5/2005 – 06 RVE dated 23.12.2005 and even number dated 09.03.2006 has asked the alternate Hydro Energy Centre, IIT, Roorkee (AHEC) to prepare model detailed project reports (DPRs) for the following four categories :

1. Category “A – 1” Village with 40 households in the hilly area. 2. Category “A – 2” Village with 40 households in the plain area. 3. Category “B – 1” Village with 200 households in the hilly area. 4. Category “B – 2” Village with 200 households in the plain area.

The villages are to be selected from the States of Madhya Pradesh, West Bengal, Jharkhand and Uttaranchal to make the DPRs more versatile and practical so that these model DPRs can be used with slight site specific changes by even those users who may not have much technical expertise.

This Document has been prepared for RVE through Biomass gasification based electric Power Plant for the Category “B-2” village: Shikarpur (District– 24 South Pargana, State – West Bengal) and also to serve as a Model Document recommended for use as a guide for RVE of similar category villages (including those ones having some variation in number of house holds) with plant and site specific modification. Any suggestions from institutions, organizations, users and interested individuals are welcome. Suggestions should be addressed to: Head, Alternate Hydro Energy Centre, Indian Institute of Technology, Roorkee – 247667, Uttaranchal, India. E-mail: [email protected] Fax: +91 – 1332 – 273517.

EXECUTIVE SUMMARY

With the rapid changing scenario of fast depleting conventional energy sources, rapid grooving demand of power the future of conventional electric power systems are getting uncertain. This has led to world wide thrust on development and use of non-conventional energy sources for electric power generation & use. This coupled with almost no chances of extending the electric power grids to the village located in the isolated islands. Shikarpur, in the Sagar islands of 24 South Pargana district of West Bengal is such a backward and schedule cast dominated village, where habitants are poor and deprived of normal liying status. Most of the families are marginal farmers or labourers and are below poverty line and even some of them are jobless. The Biomass gasifier based electric power plant proposed for this village will be helpful for:

i. Improving the condition of village. ii. Generate new opportunities for upliftment. iii. Provide light to school going children for study promising better future. iv. Provide drinking water facility in the village. v. Create awareness about the renewable sources of energy and using them for

entrepreneurship like cottage industries etc. The project is envisaged to be constructed in a period of 12 months from the date of signing the contract agreement. The West Bengal Renewable Energy Development Agency has expressed the reservation for continuous availability of biomass and hence suggested for a hybrid system having both solar and biomass systems. Whereas it was beyond the scope of present work to formulate a hybrid system, therefore, DPR has been prepared for biomass gasifier power plant only. The estimated cost of the proposed 50 kW electric power project works out to Rs. 87.890 lacs. The cost of generation work out to Rs. 13.473 per kWh and 17.964 per kWh with subsidy at 80% & 60% LF respectively and Rs. 15.658 per kWh and Rs. 20.878 per kWh without subsidy 80% & 60% LF respectively. Villagers are not in a position to bear a part of the cost of the project or to pay the generation cost as per usage, it is envisaged that each family will contribute a sum of Rs. 1000.00 towards the capital cost and 5 point load consumer will pay every month Rs. 150.00 and 3 point load consumer will pay Rs. 100.00 each, on monthly basis. The running and maintenance of the project will be done by a committee formed by the villagers and Van Samiti of the Panchayat. The source funding for the as follows:

i. Incentive subsidy by MNES : Rs. 18.02 lacs ii. One time contribution by villagers : Rs. 2.01 lacs iii. Balance to be paid by Nodal Agency : Rs. 67.860 lacs


S-1

SALIENT FEATURES

1.1 GENERAL

i. Name of the Project : Biomass based Project, for Shikarpur Village

ii. Location a. Village : Shikarpur b. Block : Sagar c. District : 24, South Pargana, Sagar Island d. State : West Bengal

iii. Access a. Rail : Kolkata – 24, South Pargana-

KaKdwip Highway upto Lot No. 8 (80 km).

b. Road : From Lot No. 8 to Kachubania to Bamankhali (5km) Metalled road. From Bamankhali to Shikarpur (3 km) Kuchcha road.

iii. Geographical Co-ordinates a. Latitude : Approx. 210 48’45” N b. Longitude : Approx. 880 10’05” E

iv. Climatic Conditions a. Temperature (ºC) : 300C Max.100C Min.

b. Humidity (%) : 90% Max. 65% Min. c. Period of Rainfall : June to October d. Rainfall : Approx. 1800 mm

v. Land for Project Construction a. At Biomass source Site : To be earmarked by Van Samiti of Village b. At proposed plant site near : Shikarpur to be provided by

villagers. vi. Approximate distance of

a. Biomass Source from Village : Surrounding the village:- 1 to 2 km b. Proposed Plant site : By the side of the Village.

1.2 DETAILS OF BIOMASS AVAILABLE IN THE FOREST IN THE SURROUNDING AREA

The area is having sporadic plantation. The usual mangrove forest or forest in real sense

is not observed at this place. The dominant species are Bamboo, Babul, Eculiptis, Sunozari, Habwl, Gazan and Rokul etc. Waste Land Reclamation Board has started plantation in the region on a larger scale. Thick forest is found in the Shikarpur island located at a distance nearly 2 km from the Shikarpur in the Muri Ganga domain.

It is proposed to have the plantation of Subabul in an area of 38 ha to maintain regular supply for the plant.


S-2

1.3 CIVIL STRUCTURES (Date given here are Tentative only)

Proposed Land for

i. Biomass store shed with open yard : 5.0 m x 10.0 m, 6.0 m x 10.0 m ii. Cooling Pond : 2.50 m x 5.0 m x 1.50 m iii. Gasifier shed : 5.0 m x 5.0 m x 8.0 m iv. Filter Shed : 8.75 m x 5.0 m x 5.0 m v. Power Plant Building : 5.0 m x 3.0 m x 3.50 m vi. Control Room : 3.50 m x 3.0 m x 3.50 m vii. Toilet : 3.50 m x 1.50 m X 3.50 m

1.4 POWER HOUSE (Date given here are Tentative only)

i. Gassifier Type : Down Draft ii. Gas Engine

a. Nos. : 2 b. Rating : 2 x 25 kW c. Rated Speed : 1500 rpm

iii. Alternator

a. Nos. : 2 b. Power Output Rating : 25 kW Each, 3 Ø c. Nominal Voltage of Generation : 400 V – 430/230 + 10 V d. Frequency : 50 Hz + 3% e. Power Factor : 0.8 lag f. Cooling : Natural / Open

1.5 POWER EVACUATION AND DISTRIBUTION SYSTEM

Distribution System shall be made as per the site conditions and location of various house holds and other user points. a. No. of House Holds : 201 (Approx.) b. L.T. Distribution Line

• No. of Lines : 2 • Voltage : 230 V • Length of Line : 2.5 km (Approx.)

c. No. of Street Light Points : 20 (Approx.)

1.6 ESTIMATED COST OF THE PROJECT

i. Cost of Civil Works : Rs. 33.62 Lac ii. Cost of the Plant : Rs. 42.34 Lac iii Distribution System : Rs. 4.71 Lac iv. Other expenses : Rs. 7.22 Lac v. Total Project Cost : Rs. 87.890 Lac

1.7 COST OF GENERATION

i. Without Subsidy Rs./kWh a. At 80% LF : 15.658 b. At 60% LF : 20.878

ii. With Subsidy Rs./kWh a. At 80% LF : 13.473

b. At 60% LF : 17.964

Photo - 1 : A View of Houses and Vegetation in the Village Si arpur.k

P-1

Photo - 2: Club Building in the Shikarpur Village.

Photo - 3: A Distant View of Muriganga The ferry Service Between the Lot No. 8and Kachubaria Links the Sagar Island With the Main Land

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Photo - 5 : Area is Having Thinly Vegetated Shrubs and Trees.Cultivation of Betal Leaf (Pan) is Most Paying Crop in the Area

P-3

Cultivation of Betal Leaf (Pan)

Photo - 4 : Betal Leaf (Pan) Cultivation in the Area.

Cultivation of Betal Leaf (Pan)

Photo - 6: A Close View of the Houses. These house Have Two to Three Roomsand Will Opt for Three Point Connection.

Photo - 7 : A View of Houses and Internal Road inside the Village Shikarpur.

P-4

Photo - 11 : Solar Home Module is Used by Few Villages.

P-6

Photo - 10 : Thatched Roof Houses Inside the Village.

Photo - 12 : A View of the Shop in the Village Sikarpur.

Photo - 13 : A View of the Shrubs Growing Around the VillageWhich can be Used for Biomass Gasifier.

P-7

Photo - 14 : A View of Vegetation Along the Path.

Photo - 15: A View of Recent Plantation Through Waste Land Reclamation Board.

P-8

Photo - 16 : Another View of Recent Plantation Along the Path.

Photo - 17 : Waste Land can be Used for Biomass Plantation.

P-9

Photo - 18 : Officals of WBREDA, Team of AHEC and Members of Village Committee During Data Collection. In the Backgroundthe Land for Power Plant is Visible.

Proposed Power Plant Site

P-1

0

AHEC/ Model DPR/ Plain 200(201)HH/BEP

1

CHAPTER – 1

BASIC DATA 1.1 INTRODUCTION

There is acute shortage of electric power generation in the country so much so that the areas already connected to the power grids are subjected to frequent power cuts. The available fuel resources being used for electricity generation are getting fast depleted. These problems and sensitivity coupled with the isolated villages of islands, make it impossible to connect them with the grid.

The economic and social conditions of the inhabitants of the, isolated, unelectrified remote villages in the Sagar island of West Bengal State are very poor. Electricity being one of the basic infrastructural requirements for development and progress, the only hope in the above scenario is the use of renewable energy sources to generate and supply electricity to the remote villages. In an effort towards this end, this project has been conceived for immediate electrification of village Shikarpur in the Sagar islands of West Bengal. Shikarpur is the poorest village in the Sagar Island.

The West Bengal Renewable Energy Development Agency has expressed the reservation for continuous availability of biomass and hence suggested for a hybrid system having both solar and biomass systems. Where as it was beyond the scope of present work to formulate a hybrid system, therefore, DPR has been prepared for biomass gasifier power plant only.

1.2. PROJECT SPONSOR

MNES, vide letters number 13/5/2005 – 06 RVE dated 23.12.2005 and even number dated 09.03.2006 has asked the alternate Hydro Energy Centre, IIT, Roorkee (AHEC) to prepare model detailed project reports (DPRs) for the following four categories:

1. Category “A – 1” Village with 40 households in the hilly area. 2. Category “A – 2” Village with 40 households in the plain area. 3. Category “B – 1” Village with 200 households in the hilly area. 4. Category “B – 2” Village with 200 households in the plain area.

The villages are to be selected from the States of Madhya Pradesh, West Bengal, Jharkhand and Uttaranchal to make the DPRs more versatile and practical so that these model DPRs can be used with slight site specific changes by even those users who may not have much technical expertise.

MNES, GOI is subsidizing the cost of RVE projects to a large extent. The balance project cost is generally met by the Nodal Agency and the people of the villages.

1.3. NODAL AGENCY & ASSOCIATED ORGANIZATIONS

West Bengal Renewable Energy Development Agency, Kolkata has been assigned to carry out energy development work through non-conventional energy sources by the Government of West Bengal. For the present DPR works WBREDA has been nominated as Nodal Agency by the MNES. In identification and selection of the village to be electrified the cooperation was sought from various Van Samits along with The Department of WBREDA.


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1.4. SELECTION OF VILLAGE FOR MODEL DPR Reconnaissance survey was undertaken to various remote villages located in the Sagar Island for selection of village(s) as per suggestion by WBREDA Kolkata. After gathering information and data, interacting with the local people and the village level organizations e.g. Gram Panchayat, Van Surksha Samiti etc and visual survey and assessment of various aspects related to the generation of power through biomass and electrification of remote village, Shikarpur village was selected for preparation of Model Detailed Project Report.

Here it is intended to electrify the remote village of Shikarpur located deep within the Sagar Island. The villagers are subjected to isolated life, having limited resources and access. Their income is also restricted to marginal cultivation, occasional labour and through dairy/poultry and fisheries trade. People are trying hard to uplift the lifestyle for which they have established a club in the village.

To uplift the life of this village dominated by, backward and schedule cast community (60%), it is essential to provide electricity so as their living standard can be raised and they can augment their income through cottage industry etc.

It is next to impossible to get the power through grid, therefore, it has become imperative to provide the power to this remote village through a non conventional source of energy. Due to availability of biomass in the surroundings of the village, the electrification through biomass gassifier has been selected for the village.

1.5. GENERAL INFORMATION – VILLAGE SHIKARPUR 1.5.1. Location And Access

Shikarpur village in the District of 24 South Pargana of West Bengal State is a human settlement located in interior corner of the island by the side of river Muri Ganga. It is linked with Kolkata/24 South Pargana through Kakdwip highway upto Lot No. 8 and from there to Kachubaria through steamer ferry. From Kachubaria the metalled road is available upto the village Bamankhali (5 km) from where a Kachcha road (3 km) links the village with the rest of the world.

The nearest railway station Sealdah is situated at about 100 km from the village. From Kachubaria jeeps can be hired for the village Shikarpur which is the only source of communication in the area. Between Kolkata and Lot No. 8 (Kakdwip) regular, frequent transport is available. Regular ferry services at the interval of 30 minuts is available between Lot No. 8 and Kachubaria in the day hours.

1.5.2. Socio-Economic Status

Shikarpur village is dominated by backward and schedule cast community having 60% population. It is having 201 households with a population of 1160 persons. Each family consists of 5 to 6 members. Most of the villagers are marginal farmers having limited infrastructural facilities. Main crops of the area are Paddy, Jwar, Maize, Pulses etc. At places wheat and


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vegetables are also grown. The main cash crop of the area is Betal leaf (pan), which is grown by nearly every villager in a typical manner. Nearly all the inhabitants are engaged in the cultivation and labour related with the development of fisheries. Wood is used for cooking proposes. In general the income of a family varies between Rs.2000.00 to Rs.6000.00 pm. There is considerable disparity amongst the people of the village. Most of the villagers have Kutcha tiled roof houses, whereas number of houses are pucca also. Few poor families have thatched roof houses.

1.5.3 Additional sources of income To augment their income most of the families keep domestic animals. Nearly a family keeps 4 to 5 cows, 1 to 2 buffalos and 6 to 10 goats. Poultry and fisheries on small scale also contribute to their income.

1.5.4 Education

Shikarpur village is having a middle school only. The nearest higher education college/ school is nearly at 16 km away at Kakdwip. Overall education level of the village as revealed by Panchayat members is as follows: Graduate. - 1 12th standard - 4 10th standard - 20 8th standard - 40 5th standard - 360

1.5.5 Health

People are in general having good health. In case of illness people have to travel to Collectorganj for preliminary treatment at PHC. For hospital facilities they have to go to Kakdwip. 60% of population suffers from Malaria.

1.5.6 Roads and transport Village is connected with Bamankhali village through 3 km long kutcha road. Form there it is connected to Kachubaria Ferry Point through 5 km metalled road. From Kachubaria the ferry services are available to Lot No. 8 (Kakdwip) which is connected with the 24 South Pargana district and Kolkata Twon through a highway (80 km).

1.5.7 Electricity availability Village is located deep in the Sagar Island, where power can not be connected from the mainland. The village is un-electrified and the possibility of getting power from the grids is also impossible. Two to three Villagers do have solar home modules. Kerosene is being used for illuminating the houses.


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1.5.8 Water availability Drinking and irrigation water is drawn from a number of wells scattered in the village and agricultural fields.

1.5.9 Communication

The village is totally isolated but is having cellular phone services.

1.5.10 Haat/ Market A weekly bazaar/haat is held at village Collectorganj and BamanKhali, where people of Shikarpur sell their agricultural produces and buy the goods of their daily needs. Village is having one shops only .

1.5.11 Grazing ground and Fodder Village is not having any defined grazing grounds whereas forest land or barren waste land is serving as grazing grounds for domestic cattle’s. Fodder in the form of leaves and grass is also collected from these areas.

A certain nominal amount of fodder is also obtained by the villagers from the agriculture.

1.6 FOREST AROUND SHIKARPUR Shikarpur village is located close to the bank of Muri Ganga in the Sagar Island which is vegetated area but the true forest is not found.. The dominant species are Bamboo, Babul, Eculiptis, Sungori, Habwl, Gazan and Rokul etc.

Recently the Waste Land Reclamation Board has started massive plantation in the area. Forest is existing in an island (Shikarpur Island) within the Muri Ganga at a distance of 2 km.

1.7 WOOD AS FUEL Villagers are collecting wood from the forest and use it for cooking. Wood logs are also collected from the forest for construction and repair of the houses. Villagers collect the wood in their compounds for monsoon and winter seasons. Cow dung from domestic cattle’s is used for preparation of organic manure.

1.8 FOREST LAND UNDER VAN SAMITI Shikarpur Gram Panchayat Van Samiti is having sufficient barren land under their management. The land available along the outer fringe of the village is found suitable for cultivation of woody plants for biomass gassifier.


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CHAPTER – 2

LOAD ASSESSMENT / ENERGY REQUIREMENT AND INSTALLED CAPACITY

2.1 GENERAL 2.1.1 Village Layout And Type of Houses

Village Shikarpur is located on a plain ground on the bank of river Muri Ganga. The villagers are having their houses concentrated at four places, with a number of houses scattered along the outer margins. Due to layout of houses it is very convenient and economical to lay the transmission line and electrify the village. In the village few houses are pucca and rests are kutcha houses having tiled roofs. Few houses, of poor people have thatchat roofs. Nearly forty five houses are having 5 to 7 rooms and one hundred forty houses have 3 to 4 rooms. The remaining sixteen houses are having 2 rooms only. Gaushalas are generally by the side of these houses. Few families are having separate Gaushalas.

On detailed questioning and assessment it was found that 45 big houses will opt for total electrification but will use 5 points load only. The two points having 15 W CFLs, will be used for illumination through out the evening and morning hours. One point will be dedicated to a fan whereas the other one will be for radio/television etc. These house owners will go for one more bright light point (60W). The remaining points will be used off and on, based on the actual requirement. The smaller houses will require only three point load (15 W CFL, 60 W Blub, 60W Fan/TV). On the whole due to saltry hot climate two/three illuminating points along with the fan point will have 100% diversity factor and the remaining points will have 200% diversity factor.

2.1.2 Use of Electricity The use of electric power is proposed for: i. Domestic Uses ii. Public Lighting iii. Drinking Water Pumping iv. Multi-purpose Uses

2.1.3 Load Assessment Electricity will be used in the following manner:

i. Out of 201 houses, 45 households will go for 5 points connections and 156 households will take 3 points load. On an average, 3.3 points will be used by each household.

The power for domestic purposes will be used for 6 hrs in a day, 2 hrs in the morning (0500 to 0700 hrs) and 4 hrs in the evening (1730 to 2130 hrs). In that area sunsets early and the village life settles around 9 pm, therefore, longer use of power in the evening is not expected.


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It is expected that out of 5 point load people will use 2 points for 15 W, CFLS, 1 point for fan (60W), 1 point for 60 W bulb, and 1 point for radio/TV, etc. having 100W load. Thus a total of 250W load will be taken by 45 households. The 3 points load users will use 1 point for 15w CFLs, 1 point 100 W bulb/other use, and 1 point for 60 W fans. Thus out of 156 households, each will use a load of 175 W. On an average a household will have a load of 192W.

ii . Public lighting up to 20 points @ 18 watts (CFL) per point for 4 hours in the evening. iii Drinking water pumping. v. Multipurpose uses e.g. pumping for irrigation, needs of agro-based cottage industries,

lighting of places of worship, battery charging, needs of shops, clinics etc. which may come up in due course of time. Power is also required for processing rice in the area. It is envisaged that the use of power in such activities will be used after the domestic use hours. Therefore, the requirement of the power for this use is not being accounted for. Power for such use can be drawn in the day hours by running the power plant.

vi. Future expansion: assumed as 15% in ten years. Due to poor living conditions people are found migrating to better places in search of jobs. This is the main reason for negligible growth of the village.

2.2 POWER / ENERGY REQUIREMENT

The requirement has been worked out as per the consideration above and the criteria discussed below and summarized in Table 2.1. Typical power supply demand and future programme (Future Vision) are shown in Fig. 2.1. i. Domestic Uses

-Connected load, as per discussions earlier is 192 W -Diversity factor

-CFL and 60 W bulb100% -Other load -200% -Actual load -135 W -Supply hours -6hrs/day -Energy consumption per H.H per day = 135 X 6 = 810watts Say = 0.85 kWh/day -Total power requirement for 201 H.H = 135 X 201 watts = 27.135 kW Say = 28 kW

- Total energy consumptions per day for 201H.H = 0.85 X 201 kWh = 170.85 kWh

ii. Public Lighting It is proposed that public lighting will be used for 4 hours in the evening only. The final operation and maintenance is conceived to be in the hands of the local body of the village and accordingly public lighting and other loads will be managed by them as per their choice, and hence the number of hours of usage will be finalized.


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a. No. of light points – Up to 20 b. Type of lighting – 18 watts CFL c. Lighting hours – 4 hours in the evening. d. Power required – Up to 18 x 20 = 360 W or 0.360 kW e. Energy consumption – Up to 0.360 x 4 kW hrs or 1.440 kWh

iii. Drinking Water Pumping a. Water requirement per HH: Up to 180 liters (Assuming 30 liters/ person

and 6 persons/ house hold) b. Total water pumping required: 180 x 201 = 36180 liters or 36.18 cu m c. Pumping power needed: Assuming up to height of 20 m: =9.81 x (36.18/10800) x 20 x 0.60 = 0.394 kW, Say, 0.5 HP or 0.373 kW d. Pumping hours: Assumed up to 3 hours e. Energy consumption: 3 x 0.373 = 1.119 kWh

iv. Multipurpose Uses Depending on requirement and willingness of the people, the plant can be operated for the required number of hours between 9 a.m. to 5 p.m. The power availability for multipurpose use will be limited to about 40 kW only. This requirement can not be assessed at present.

v. Installation Capacity Of Power Plant Assuming power house consumption @ 10 %, line losses @ 5 % and the future growth @ 15 % in next 10 years, the Power Plant installation capacity is worked out as below: a. Domestic load = 28 kW b. Public Lighting = 1.440 kW c. Drinking Water Pumping = 0.373 kW d. Future Growth = 0.15 x 28 = 4.20 kW

Sub-Total (a to d) = 34.013 kW f. P.H. consumption/system losses = 0.15 x (34.013) = 5.102 kW

Total = 39.115 kW Say, = 40 kW

The biomass gasifier based power plant do not yield the desired output and it is also possible that people may use fans for continuous duration, therefore, the capacity of power plant has been taken as 50 kW.

vi. Energy Consumption per Day

a. Domestic load : 28.0 x 6 = 168.0 kWh b. Public lighting : 1.44 x 4 = 5.76 kWh c. Water pumping : 0.373 x 3 = 1.119 kWh d. PH consumption : 5.102 x 6 = 30.612 kWh Total = 205.491 kWh Say = 206.0 kWh


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The consumption in respect of multipurpose uses has not been considered here as the same may take some time to come up. However, depending upon the number of hours of running of this load additional energy consumption will be there. The proposed daily use requirement of power and energy consumption is summarized in Table 2.1 below:

Table : 2.1 – Proposed Daily Use Requirement

Daily Use requirement of Sl. No.

Use Power (kW) Energy (kWh)

1 2 3 4 1. Domestic Use 28.0 168.0 2. Public Lighting 1.44 5.76 3. Drinking Water Pumping 0.373 1.119 Sub Total (Item 1 to 4) 29.813 174.88

5. Future Expansion @15% 4.20 25.20 6. PH Consumption, Losses etc. @ 15% 5.102 30.612

Total 39.115 230.692 Capacity Taken as 50.00 231.00

50 INDEXDL-

45

DW- Drinking water pumping

MU-

BC- DC Battery ChargingAN

PC- & SL

FG - Future Load GrowthMU Miscellaneous

0 Note:

Fig. 2.1:

40

8(a)

Typical Power Supply Programme (Future Vision For Sikarpur Village)-Timings are Adjustable onSeasonal Basis and other Requirements, if any.

2421 2219

DW

Power houseConsumption & Systemlosses

2 3 1885 1276

Domestic Load Lighting,Fan, Radio, T.V. etc.

Multipurpose uses(cottage industries,Agricultural value-adding industries, Loadsof community centre,School, Clinics, Shopsetc.)

Agricultural Needs eg.Water Pumping forIrrigation

Pow

er R

equi

rem

ent (

kW)

Day Time (hr)

13 14 15 16

35

2317 20

30

25

5

DW

20

15

to enable Power Supplyas shown in this figure,the installed Capacitywill have to be suitableincreased.

Cat

egor

y -'B

' (20

0 H

ouse

Hol

ds)

41 9 10

10

11

BC & AN(Future Vision)

BC & AN(Future Vision)

Multipurpose Uses (MU) (Future Vision)

Domestic Load (DL)Domestic Load (DL)

Power House Consumption & System Losses (PC & SL)

Future Load Growth (FG)

Miscellaneous (MU)


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CHAPTER – 3

RESOURCE AVAILABILITY AND MANAGEMENT 3.1 BIOMASS 3.1.1 Availability

The above remote electrification scheme requires a suitable, continuous and reliable source of Biomass, which should be available within 2 to 3 km from the power house site. Sikarpur village is surrounded by slightly vegetated area which is dominated by Babmoo, Babul Rokul, Eculiptis trees. Forest area is in Shikarpur Island (2 km) in the Muri Ganga domains. Most of the shrubs have wild and thick growth, and are undesirable elements in the development and growth of new plants. These shrubs are available in the area which can be used in the gasifier unit. It is likely that these shrubs may provide fuel for few years only and based on the long term strategy, these shrubs or fast growing plants like Subabul have to be grown on the panchayat or the Van Samiti land. The location of power house has been tentatively selected in the central part of the village close to the houses. Near to this site degraded/waste land having growth of wild shrubs is existing, which can be utilized for development of biomass for regular supply to the power house. This regular supply can be assured through plantation of fast growing trees requiring minimum water. Considering the topography, drainage and nature of soil, the plantation of Subabul has been found most suitable for the area. Forest Officials were also in agreement with this. According to them Van Samiti Panchayat can provide land and expertise for the same. WBREDA officials were apprehensive that forest officials due to their limitations may not allow the use of wood from the area around the forest or newly planted zones. They were of opinion that hybrid system consisting of Solar and Biomass Gasifier may be suggested for this area.

3.1.2 Future Requirement

The requirement of the biomass can be worked out as given below:

i. Energy consumption per day on 7 hours working basis : 350 kWh. ii. Biomass consumption / kWh of electricity : 1.5 kg. iii. Daily requirement of Subabul : 70 x 1.5 = 525 kg. iv. Size of Subabul log to be used : Girth : 20 cm, Length :2.5 m.


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v. Approximate weight of 1 log : 10 kg. vi. Number of logs required per day : 52 vii. Number of trees required per year : 52 x 365 = 18980 viii. Spacing required between the plants : 2 x 2 m. ix. Area required for growing 4380 Subabul plants : 75920 sq. m.

for use in one year Say : 7.6 Ha. x. Land required for the cycle of 5 years : 38 Ha

3.1.3 Plantation of Subabul In general it requires, 4 years period for the Subabul plants to grow to the size needed for the present use. It is suggested that 5 separate areas of the size 7.5 ha. each should be ear marked close to the village and power house plant.A small area has to be earmarked for the nursery also. For the first two to three years the resources already available in the form of shrubs, Babul, Eculiptis, Gazan, Habul etc. will be utilized. In the meanwhile the plantation will be done over the land (38Ha) demarcated in the 5 segments of 7.5 Ha each. The nursery will be maintained for regular plantation and replacement of dead plants. Though the Subabul plants will take around 4 to 5 year to grow, but the first lot can be drawn from the 3rd year itself as the rainy season in the area is always prolonged, and the growth of plants is faster. i. The plantation shall be done by the villagers under the supervision of the Van

Samiti of the village panchayat in a manner that continuous supply of biomass shall be available for the Gasifier plant, as per the requirement from the 3rd year onward.

ii. The households will manage the supply of the biomass to the Gassifier plant by rotation. The arrangement of the transport will be through carts/or head load as the distance will not be much.

iii. Biomass will be collected, dried in advance and stocked in the sheds meant for it so as to ensure reliability.

iv. The nursery will also be managed by the people of the village where the seeds will be sown as per the requirement, plants shall be grown and maintained for about a year and then transplanted in the earmarked areas.

v. Arrangement of seeds, manure etc will be managed by the Forest Department / Nodal agency.

vi. A tube-well will be bored in the nursery area for watering the plants. vii. Subabul plantation will not require regular watering as it is a plant of arid to

semiarid region. viii. The growth rate of the plant being very good, sufficient amount of biomass shall be

available from the said plantation for continuous, successful and reliable working of the Gasifier plant.

3.2 BIOMASS MANAGEMENT

The management of the Biomass plantation is proposed to be done by the committee formed by the villagers and Van Samiti under the supervision of WBREDA and West Bengal Forest Department.


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3.3 RESOURCES OF OPERATION AND MAINTENANCE i. Local person/persons from nearby area having reasonable reading and writing

skills, suitable intellectual capacity and willingness to work as operator/ maintenance staff, is to be identified.

ii. Facility to provide an on situ training to the above persons, is to be provided. iii. Tools and plants, gadgets, safety equipment, etc. as required for maintaining the

plant and distribution system, are to be provided. iv. Spare parts for successful operation of the system for 10 years period, are to be

made available. 3.4 MONETARY RESOURCE

The scheme is to be funded: i. Partially by the MNES, ii. By initial lump sum contribution by the village people iii. Balance by the Nodal Agency.

3.5 NODAL AGENCY FOR INSTALLTION OF THE PLANT

WBREDA, Kolkata the Nodal Agency for this project will be responsible for planning, designing, processing the purchase case, placement of order, supervising construction, liaison etc.

3.6 O & M ACTIVITIES The management, operation and maintenance of the plant (including distribution system) will be carried out by the contractor for initial 5 years period and thereafter by the committee formed by the Shikarpur village in association with Van Samiti and WBREDA.


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CHAPTER - 4

CIVIL WORKS 4.1 INTRODUCTION

The civil structures for the proposed Biomass based Electric Power Plant (BEP) will comprise: i. Biomass Store shed with Open yard for drying, ii. Gasifier shed, iii. Filter Shed iv. Cooling Pond, v. Power House Building, vi. Control Room, vii. Water supply System (including room), viii. Construction of boundary wall, fencing etc., ix. Any other facility as may be required,

4.2 CIVIL WORKS

The civil works will consist of the different components as described below. The dimensions stated in the test are tentative only and can change depending of on the final selection of equipments.

4.2.1 Biomass Store Shed with Open Yard A 5.0 m x 10.0 m store shed is required. It is proposed to have CGI sheet wall on wooden frame & CGI sheet cover on tubular truss. An open yard for drying of biomass is proposed to be located near the shed. The open yard having barbed fencing will be 6.0 m x 10.0 m size.

4.2.2 Cooling Pond A 5.0 m x 2.50 m x 1.50 m cooling pond is proposed to be constructed by the side of gassifier unit within the gasifier shed.

4.2.3 Gasifier Shed An open gasifier shed of size 5.0 m x 5.0 m having CGI sheet roofing on tubular truss is proposed to be constructed for housing the biomass gasifier of the plant.

4.2.4 Filter Shed An open filter shed of size 8.75 m x 5.0 m having CGI Sheet roofing on Tubular truss is proposed to be constructed for housing the filters.

4.2.5 Power House Building A power house building of size 10.0 m x 6.0 m is to be constructed to house the gas engines, the generators and their auxiliaries. This building may be constructed with 250 mm thick stone or brick walls having CGI sheet roofing.

4.2.6 Control Room The control room will be of 3.50 m x 3.0 m size, placed by the side of the P.H. building, It may be constructed with 250 mm thick brick walls and RCC roofing.

4.2.7 Toilet 1.5 m x 3.0 m size toilet will be provided at the site.

4.2.8 Any Other Building / Structure : As may be required.


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4.3 CONSTRUCTION i. Minimum clear height of the sheds and buildings is to be as given below:

a. Biomass Store : 3.60 m b. Gasifier shed : 8.00 m c. Filter Shed : 5.00 m d. P. H. Building : 5.00 m e. Control Room : 3.50 m f. Toilet : 3.50 m

ii. The foundation bed of the generator shall be at least 200mm above the floor level and have provision for grouting of bolts, studs and anti-vibration dampers. Arrangement shall be made for water proofing and foam layer to damp vibrations.

iii. The foundation shall be located at least 300 mm away from the column footings and plinth beam to avoid transmission of vibrations caused by the generating sets.

iv. Adequate arrangement for proper ventilation shall be provided. It shall include exhaust fans and smoke exhaust pipe located in a manner to ensure dissipation of smoke in direction away from the building.

v. The floor of control room and toilet shall be made of good quality mosaic with best quality white cement and marble chips.

vi. Inside brick wall shall be plastered and white wash distempered. vii. Windows/ventilators shall be fixed to ensure natural lighting inside the

buildings. viii. Proper equipment fitting facility shall be provided. x. Proper lighting arrangement shall be made both inside and outside the

buildings / sheds and approach road. xi. The construction is to be done as per the Approved drawings. xii. The structural design shall be done based on soil test, stability and safety

factors etc. xiii. The construction is to be carried out as per the National Building Code of

India, unless otherwise approved. xiv. Foundation for holding and grouting the gasifier unit etc. shall be made in

1:2:4 RCC or as Approved. xv. Any other arrangement required as per site condition shall be made to ensure

proper functioning of the plant and the system.

4.4 WATER SUPPLY SYSTEM AND ROOM

4.4.1 Setting up of water supply system

i. Water supply system will be placed inside a room of appropriate size. ii. Installation of a 1 HP submersible type motor-pump unit, the motor being of

Siemens /NGEF / Cromton / Jyoti / Kirloskar make operable on 230 V, 50 Hz, 0.8 PF AC supply.

iii. Boring and installation of tube well. iv. Water piping system including bends, sockets, valves, clamps, civil works etc,

will be of galvanized components. 4.4.2 Boring etc.

Boring of tube well up to required depth and of required diameter, through all type of soil strata present. Works will include scaffolding, lowering of pipes, strainers, blind pipes including bucket washing etc.


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4.4.3 Storage Tank A 10000 litres PVC water storage tank of Sintex /Palton or equivalent will be installed on a fabricated platform at a height of 6.0 m.

4.5 MISCELLANEOUS

4.5.1 Gate The main gate is proposed to be 4 m (wide) x 1.80 m (high) comprising 2 panels made of MS angle frame and rods with guide Track etc. supported on 2 numbers 400 mm x 400 mm RCC pillars on both sides.

4.5.2 Fencing Pre-cast RCC posts, 2 m high with 0.3 m bend at the top, is to be erected and chain link fencing (50 mm x 50 mm x 8 SWG size) fixed with the RCC posts by means of galvanized clips to a grid of horizontal strands of galvanized high tensile spring 12 SWG steel wire.

4.5.3 General Facilities Drinking water supply system, Toilets etc. are to be provided in the P.H. building.

4.5.4 Approach Road Suitable approach road shall be provided from the nearest road for the required services.

4.5.6 Environmental Provisions Necessary provisions are to be made as per the requirement of environmental rules and regulations in force.

4.5.7 Safety Provision All the required provision with regard to fire hazards will be provided. 4.5.8 Fabrication of Structures

The materials to be used and fabrication and construction method, and fixing mild steel or iron work in small sizes and sections such as holding down bolts, holdfasts, tie rods, gratings etc. be as per relevant Indian Standards.

4.5.9 Painting Steel work is to shall be thoroughly cleaned of rust, loose scales, dust etc. as per latest edition of IS: 1477-part-I and given one coat of red oxide paint conforming to IS: 2074 applied as per IS: 1477-part-II. Over surface inaccessible after placing in position, two coats of red oxide paint should be applied.


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CHAPTER -5

POWER GENERATION EQUIPMENT

5.1 TYPES OF GASIFIER 5.1.1 The following types of gasifier are available:

i. Down draft or Co-current ii. Updraft or Counter-Current iii. Cross Draft iv. Fluidized Bed System The use of small down draft gasifier has long history in the world. During the world war-II, number of cars, buses and boats were operated by down draft gasifier using wood as fuel. The down draft gasifier have a number of advantages over the others, which make it most convenient and efficient to use. The main advantage of down draft gasifier is the fact that the pyrolysis products have to flow co-currently through the hot combustion and gasification zones, where most of tars are decomposed and oxidized. Thus the producer gas from a down draft gasifier, after simple filtration and cooling, can be used in an internal combustion engine. Hence down draft type gasifier is recommended for power plant.

5.1.2 Capacity of Gasifier The capacity of the gasifier should be suitable to operate 50 kW (electrical net output) gas engine genset with likely gross output of 60 kWe.

5.1.3 Material of Construction of Gasifier Reactor inner shell, combustion cone, scrubber, throat and nozels to be of stainless steel. The other non MOC part should be of standard carbon steel.

5.1.4 Specifications of Gasifier Average Calorific Value - Not less than 1000 k cal/Nm3 Turn Down Ratio - 1:0.3 (Minimum) Biomass Consumption - 1.5 + 0.1 kg/kWh Hopper holding capacity - More than 350 kgs. Biomass Feeding internal for batch operation- Every 2 hours

Period of continuous running - 24 hours Starting time - Within 15 minutes Starting method - Through auxiliary power - Auto start through battery by starting scrubber pump/engine suction Reduction Bed Control - Through an automated control system

to result in reasonably constant gas flow rate and gasifier pressure drop without any manual intervention for reasonable period.

Biomass Feeding System - Manual through small ladder or a bucket elevator. Biomass feeding should be online without stoppage of system.

Ash Char Removal - Continuous online. Filtering Arrangement - Minimum One no. Check (fabric) filter

and two nos. of fine filters along with wet scrubber to be provided. Biological filter media shall be used in fine filter.


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Biomass Sizing Equipment - Through suitable motor operated cutter. . Biomass (wood) drying Device - Through Engine Exhaust Based Dryer Painting of all gasifier system - All exposed steel/iron parts (major /

minor) if any of all gasifier systems must be suitably painted and protected against corrosion due to high humid saline atmosphere during the guarantee period.

5.1.5 Specification of Gas Cooling & Cleaning System Gas Quality - For gas engine operation, an extremely

clean & cooled gas is essential. Tar & Particulate matter should be less than 25 mg/cu.m.

Type of Filter Material - Biological or fine filter cloths shall be used.

Material Life of Checking filter cloth - Minimum 1000 hours Interval of cleaning - Minimum 50 hours Cooling System - The gas temperature at engine inlet

should not exceed + 50C of ambient or 400C, which ever is less.

5.1.6 Woody Biomass Fuel Size The following size of the biomass fuel is to be used: i. Maximum diameter and length: 75 mm and 100 mm respectively ii. Minimum diameter and length : 10 mm and 10 mm respectively

5.1.7 Blower

i. The blower should be of suitable rating and capacity as per the Standard Specifications followed.

ii. The body and the impeller shall be made of SS-316 having thickness not less than 2.5 mm and 2 mm respectively and suitable for the required flow rate and pressure.

iii. The blower is required to be suitable for regulating the gas flow and its flaring as and when necessary.

5.1.8 Pumps Pumps of suitable rating and quality as per the Standard Specifications to be followed and having preferably rotational speed of 1500 rpm should be provided for: i. Cleaning and cooling of the producer gas. ii. Cleaning of ash pond(s).

5.1.9 Gasifier Control Panels Control panels of suitable dimensions, quality material and thickness mounted with protection equipment for required degree of protection and necessary indicators related to the operation of vibrators, motors, blowers, pumps etc and sensing devices e.g. temperature etc. as per relevant Standards are to be provided at appropriate locations as per Approved drawings.

5.1.10 Specifications of Gas Engine Gas Engine Make - Any indigenous reputed make suitable

to run on producer gas alone with rated speed not above 1500 rpm.

Specific fuel consumption under producer - 1.5 kg of woody biomass/kW-hr gas operation Power Rating of engine - 70 kW


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Type of governing - Mechanical Engine Starting System - Through auxiliary power

Engine lgnition System - Through pointless Distributor based ignition system

5.1.11 Bearings i. Position

The Gas Engine is proposed to be centrally mounted, having properly aligned bearings. All the bearings should be guaranteed for 5 years.

5.1.12 Pressure Gauges / Other Instruments i. Pressure Gauges

A pressure gauge is recommended to be provided in the P.H. to read the pressure of Gas just before it enters the Gas Engine. It should have scale to read approximately half- scale at gross head.

ii. Other Instruments Other instruments of Standard make and quality should to be provided as per requirement at appropriate locations.

5.1.13 Safety Guards All moving parts should be shielded by a strong and durable wire mesh. The size of the wire mesh should be small enough to prevent the entry of hands and arms of the children. The guards should be electrically earthed and kept permanently secured by locks.

5.1.14 Spare Parts A set of recommended spare parts in respect of gasifier and gas engine for five years’ successful operation should be provided.

5.1.15 Tools

i. Set of Tools A set of tools is recommended to be provided. The set should include tools to test alignment and case tolerances e.g. string, steel rule, measuring tape, square, feeler gauge, dial gauge, sprit level etc.

ii. Tool Display Board Tool locations should be silhouetted on a tool display board so as to immediately make it apparent if a tool is in use or missing.

iii. Lifting hoists Suitable lifting hoists be provided in the power house.

iv. Re-chargeable Lantern A re-chargeable battery-powered lantern is proposed to be provided in the power house.

5.1.16 Type Tests The type tests should be performed as per the relevant Standards followed. The equipment offered should with stand these tests successfully or as per the recommendations / methodology of Gasifier Action Research Projects (GARP) carried out under the Ministry of Non-Conventional Energy Sources (MNES), Govt. of India.

5.2 ELECTRO-MECHANICAL EQUIPMENT 5.2.1 Type of Alternator

Three phase, A.C. Synchronous Generator are recommended to be provided.

5.2.2 Specifications of Alternator Make - Any reputed make kVA rating - > 125 kVA


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Voltage - 400 – 430 Volts Phase - 3φ Power Factor - 0.8 Frequency - 50 Hzs

5.2.2.1 Specifications of Control Panel System - Should have all necessary switches,

timers, protection etc. as per IE standard

Meters - Voltmeter, Ammeter, Frequency meter, Energy meter of reputed make

5.2.2.2 Protection System i. Over Current and Earth Fault Protection

a. Over Current Protection Miniature Circuit Breaker (MCB) or Molded Case Circuit Breaker (MCCB) of suitable rating should be used for the purpose. These should be placed as close to the generator terminals as possible.

b. Earth Fault Protection An earth leakage circuit breaker (ELCB), also known as Residual current device (RCD), of suitable rating is recommended to be provided as close to the generator terminals as possible.

c. Ratings of above Protection The maximum rating of the above protections should not be more than 10 % of the current rating of the generator.

d. Location The over current and the earth fault protection may be placed in the same box with each one clearly labeled but the mounting should not be on the generator body (so as to avoid vibration damage). These should be placed at least 1m above the floor level and as close to the generator as possible with properly fixed and sealed conduit protecting the cable to the generator. The ELCB should be connected to the generator and then the over current trip should be connected to the ELCB.

ii. Voltage and Frequency Trips These are proposed to be provided to protect consumer loads from un-acceptable voltages and frequency conditions. Over Voltage, Under Voltage, Over Frequency and Under Frequency Trips are recommended to be provided:

5.2.2.3 Lightning Protection To protect the power house and the consumers, lightning arrestors are proposed to be provided on each phase as below: i. 1 arrestor on the first pole out side the P.H. and 1 arrestor per km of distribution line, ii. An additional arrestor, if a consumer is more than 500 m away from the arrestor.

5.2.2.4 Instrumentation i. Placement

These, except the kWh meter, may be included on the controller box. The height should be at the eye level or 1.5 m above the floor level.

ii. Meters Voltmeter, Ammeter, Frequency meter, Wattmeter, Ballast meter (in ELC system, 3 ballast meters- 1 per phase) shall be provided.


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5.2.2.5 Controllers, Governors and Flow Regulators An Electronic Load Controller (ELC) or a combined electronic and flow governor should be provided. The controller must be located in the P.H. together with the ballast to ensure that the ballast is never disconnected.

5.2.2.6 Consumer Isolation Switch A switch, rated at current equal to or higher than that of O/C trip, should be provided in the P.H. to isolate the distribution system from the generator.

5.2.2.7 Earthing i. The following should be effectively earthed:

a. The neutral of the generator. b. All the metal casings of the electrical equipment etc. c. Earthing in the powerhouse should be as per the specifications of the Earth

Leakage Circuit Breaker (ELCB). ii. Precaution should be taken to prevent corrosion due to electrochemical effects,

which can be done by using copper conductor/ electrode for earthing, avoiding bi-metal joints, or by maintaining air and water exclusion from bi-metal joints.

iii. ELCB (RCD) should be used for electrical safety. iv. The earth conductor (connection from the earth terminal to the earth electrode)

should have a minimum cross-sectional area of not less than 25 sq. mm. A permanent level “Safety Electrical Connection – DO NOT REMOVE” should be provided.

V. Earthing is proposed to be done as per the REC (Rural Electrification Corporation) standard and in line with Indian Electricity Rules.

5.2.2.8 Lighting i. The P.H. is proposed be provided with adequate safe illumination: minimum 10

watts / sq. m. of floor area, if incandescent, or 3 watts / sq. m., if fluorescent. ii. A battery-charged type lantern (emergency light) should be provided on display

board. iii. A weather proof HPSV flood light should be provided out side, above the door, on

suitable fixtures providing 20 Lux illumination. iv. Street lighting/Road should be provided with 20 Lux illumination using Approved

type lighting equipment & fixure (s). 5.2.2.9 Conduits and Cables

i. Strong conduits, physically secured to all enclosures by means of threaded connectors, should be used to protect all cables.

ii. The conduits should be sealed to the enclosure entrances. iii. Since the cable inside the conduit from generator to over current- trip / ELCB box is

not protected from over currents and earth faults, adequate physical strength of conduit should be ensured,

iv. The current carrying capacities of the cables, after taking in to account the de-rating required for use of conduit and multiple cables, should not be less than 140% of the rating of the over current protection device(s),

v. If the cables are felt over- warm on touching, it is an indication of these being under-sized. The cables should be doubled or replaced in such cases.

5.2.2.10 Sockets Two or more sockets (outlets) should be provided for use of electrical appliances. The sockets should be placed at least 1 m above the floor.

5.2.2.11 Shielding i. Cables and their connections to Units is proposed to be shielded both by conduit and

by their insulation. The connections should be with in the closed casings. ii. All live surfaces and points should be fully and reliably shielded from human

contact.


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iii. Door interlock isolators should hall be provided on control gear with voltages above 50 V so as to ensure safe working.

5.2.2.12 Hazards and Safety Provisions The producer gas being a mixture of Carbon Monoxide, Hydrogen, Methane etc., toxic, explosion and fire hazards are associated with it. Proper design, construction, operational methodology etc. should be used to safe guard against the hazards e.g. : i. To avoid gas leakage during start and closing operation. ii. To avoid air leakage into cooled gasifier still containing gas. iii. To avoid penetration during refueling. iv. To avoid air leakage into the gas system. v. Taking up precautions against:

a. Flames through gasifier. b. High surface temperature. c. Spark during refueling. d. Providing suitable, adequate and approved fire protection equipment/system

for indoor and outdoor installations comprising; * Foam Type Fire Extinguishers * Carbon-Di-Oxide Type Fire Extinguishers * Sand and water bucket Type Fire Extinguishers (including a pit of adequate size located centrally and filled with dry sand).

5.2.2.13 Safety Guards Appropriate and approved safety guards are recommended to be provided. 5.2.2.14 Tools

i. Required number and type of tools should be provided as per Operator’s Manual. ii. The tools should be suitably located on tool display board.

5.3 PROCESS OF GASIFIER

i. The biomass is fed through the feed door and stored in the hopper. Limited and controlled amount of air for partial combustion enters through air nozzles. The throat (or hearth) ensures relatively clean and good quality gas production. The reactor holds charcoal for reduction of partial combustion products while allowing the ash the escape through perforated sheet provided in reactor. It is then turn taken out through manual ash collection cone after one shift of 8 hours of operation.

ii. The gas passes through the annulus area of reactor from upper portion of the perforated sheet. The gas outlet is connected with the various downstream system viz venture scrubber, water junction box, fine filter, safety filter, flare with valve and gas control valve. Gas produced in gasifier is scrubbed and cooled in scrubber with re-circulating cooling water in cooling pond with the help of DC scrubber pump.

iii. Gas is separated from water in water junction box and introduced in fine filter and a safety fabric filter.

iv. Cool and clean gas and air is then sucked into the engine through a gas train consisting of piping and valves arrangement.

v. The gasifier is started with a battery or auxiliary genset, which initially provide auxiliaries power to DC scrubber pump, to start the gasifier system

vi. The producer gas then starts engine on gas mode. vii. Governor linked control butterfly is provided to vary the gas quantity as per

electrical load on the generator, keeping frequency within limits. viii. Engine gasifier control panel provides for all switching, indications and safety of

operation. ix. An electric driven biomass cutter and engine hot exhaust based wood pieces drying

arrangement is also provided to make the system self-sufficient.


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The Flow Diagram of the process is given in the Fig. 5.1.

5.4 MAINTENANCE MANUAL AND LOG BOOK Three (3) copies of maintenance manual should be provided. A logbook, in the format as per the Maintenance-Training Manual, should be provided.

5.5 PROPOSED SPARES Following spares are recommended to be provided in the power house:

i. Instruments (Voltmeter, Ammeter, Pressure gauge, etc.), AVR, Digital Multi-meter, Emergency rechargeable lights. etc.

ii. Lubricants like multipurpose grease and oils in dust free containers. iii. Bearings, Bolts and nuts. iv. Fuses, MCBs and ELCBs. v. Cable connectors. vi. Lightning arrestors. vii. Ballast heaters. viii. Rubber washers for the flange joints. ix. Two lengths of penstock. x. V-belts and couplings. xi. A set of open-ended spanners, Flat and cross-head screwdrivers, Grease gun,

Bearing puller. xii. Tool rack to neatly place the tools xiii. Special tools like chain-pulleys, etc. xiv. Spares required for the gasifier system. xv. Spares required for the gas engine.


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CHAPTER - 6

POWER EVACUATION AND DISTRIBUTION SYSTEM 6.1 CONSUMER VOLTAGE VARIATION AND POWER FACTOR

The consumer voltage shall be within ± 10% of 230 V and the P.F. shall not be below 0.8.

6.2 PROVISION OF ELCBs AND LOAD LIMITORS

ELCBs (also known as RCDs) are to be provided as required. MCBs of proper size (0.5A for 100 W and 1.0 A for 200 W) are recommended to be installed at the load points.

6.3 LIGHTNING PROTECTION

Suitable LAs are to be provided. The earth electrode resistance is recommended to be less than 1Ω.

6.4 DISTRIBUTION PLAN

i. LT distribution lines are to be drawn as per the requirement keeping in mind the location of house holds, their density, requirement of public (street) lighting, cost of line, O & M requirement etc.

ii. A distribution diagram should be provided showing key line distribution information:

a. Position of lightning arresters. b. Voltage at powerhouse. c. Positions of isolation switches and ELCBs. d. Cross-sectional areas and the materials of the conductors. e. Number of phases for each section. f. Cable lengths. g. Maximum load demands at the load centers (in Amp.). h. Minimum expected voltages at all nodes and load centers.

iii. Load distribution design so as to enable proper balancing of load on all the links.

6.5 ISOLATORS / FUSES / ELCBs

i. All the consumer circuits should be provided with isolation switches and fuses or MCBs and labeled in local language. A well-illustrated electrical booklet is to be provided for each house hold.

ii. If the number of consumers is large, isolation switches shall be provided to cluster of consumers.

iii. Where the number of consumers is large and spurious triggering of a single ELCB in the power house poses a problem, it is recommended that clusters are protected by ELCBs. These can be located in side the power house or out side in water proof housing. In the later case, it is recommended that the power house is also fitted with an ELCB having reduced sensitivity and response time.


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iv. The earth faults are required to be located with out undue delay. This can be provided by an ELCB. If the P.H. ELCB trips, the first step is to isolate the P.H. and then restart the generator. If the P.H. ELCB stays un-tripped, the fault is in the distribution system. Then isolate clusters of consumers or all individual consumers. Progressive switching in of consumers will reveal the location of fault.

v. It is recommended to install a single ELCB of 150 m A rating or less at the P.H. to protect each circuit. A single 30 m A ELCB is recommended for the load points using loads more than 1 kW.

6.6 LOAD LIMITERS

MCBs of appropriate size (0.5 A for 100W and 1 A for 200 W) are recommended to be at load points and PVC insulated cables of 1mm sq. for house wiring for maximum load of less than 200 W.

6.7 CABLES i. Aluminium, copper, ACSR and high strength aluminium alloy overhead cables

are recommended for use (under ground cables, being costly, may not be used). ii. Minimum ground clearances for overhead lines are 5.8m across motorable roads,

5.5m by the side of motorable roads and 3 m over open ground. The minimum horizontal top clearance is 1.5 m.

iv. In heavily vegetated areas, insulated cables are recommended for use. v. Sags and tensions of cables, size of poles, types of insulators etc. are to be used as

per the REC construction Standards. vi. Selection of conductors shall be as per the REC construction standards. vii. The spacing shall be 300mm between conductors for a vertical arrangement of

overhead lines and the neutral conductor shall be at the lowest. viii. The joints must be durable, strong, adequate for their purpose and visible. Bi-

metallic clamps should be used for joints, which connect dissimilar metals. 6.8 TYPE OF POLES 6.8.1 Materials

This could be hard wood, reinforced or pre-stressed concrete or galvanized pipe. The wooden poles should be treated / painted and the steel poles painted for longer life. If care for safety can be ensured, the trees may be used for laying the cables.

6.8.2 Height of Poles i. 7m high poles for insulated cable network, up to 10 sq. mm cable size. ii. For cable size of 10 sq. mm and up to 35 sq. mm, 9 poles are to be used. iii. For un-insulated cables and bundled cables, the height of poles should be 9 m and

13 m respectively.


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6.8.3 Span of Poles Following span is recommended for distribution system for houses. The span length for the distribution running cross-country may be taken as 60 to 90 m as per the site requirement. i. For single phase system:

a. Up to 16 sq. mm insulated wire : 2 core, maximum span should be of 30 m. b. Above 16 sq. mm and up to 35 sq. mm: maximum span should be 25 m.

ii. For three phase system: REC national Standards shall be followed for span and length for AAC or ACSR bare conductors.

6.8.4 Insulators i. For bare cables, LT insulators are recommended for use. ii. For insulated cables, nylon bobbins or telecom insulators may be used as partial

insulators. iii. The connections are to be carried out as per REC Standards.

6.8.5 Stays

Stays must be used at the first and the last poles of the straight lines and also at any turns.

6.8.6 Span and Sag Span and sag shall be provided as the REC Standards.

6.9 HOUSE WIRING

i. MCBs shall be used as load limiters as incoming protection device (0.5A for 100 W and 1 A for 200 W). Appropriate MCBs are to be installed as the main incomers for other loads.

ii. One circuit with 1 sq. mm cable can be used for installations up to 1kW. The wire shall be of 600 V grade insulation.

iii. Standard switches designed for 230 V AC shall be used. iii. Conduits shall be used wherever mechanical protection is needed and the wires

can be clipped onto the wooden parts for running on the roof section.

6.10 TEMPER PROOFING

Individual units, e.g. controller box, shall be provided with temper proofing or be sealed to ensure assess by the specialist service technicians only.

6.11 MAINTENANCE MANUAL

Maintenance manual should be provided and kept in place for use during O & M of PH. 6.12 LABELS AND NOTICES


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i. Al electrical components; particularly switches, protection trips, circuit breakers, fuses etc.; shall carry labels describing their functions.

ii. H.V. winding labels shall be placed on all cabinet doors, terminal covers etc. iii. A circuit diagram shall be provided in each individual unit such as the controller. iv. A block diagram showing overall electrical lay out shall be provided in the P.H.

and it shall be durable and accessible. v. An illustrated notice, in local language, shall be provided to warn the people of

the danger of electrocution. It shall be durable, within easy view and contain practical information on preventing and coping with electrocution and electric shock.

6.13 LINE DISTRIBUTION SYSTEM

i. Generator neutral earthing and all the exposed metal bodies of the installation shall be earthed at the installation.

ii. Use of ELCBs: residual current devices (RCD) shall be provided. iii. Size and class of wire: the wire shall be 600 V grade. Appropriate size of the

cable shall be provided taking into consideration voltage drop requirement and length of the circuit – 1 sq. mm cable can be used for circuit length of 30 m (with voltage drop provision of 4 % from the origin of the installation)

6.14 SELECTION OF CABLE

Selection of cables should be made keeping in view the basic requirements, cost effectiveness and the environmental etc.


26

CHAPTER – 7

TESTING AND COMMISSIONING

7.1 TESTING

Testing of equipment and works are recommended to be carried out as per the relevant I.S./ I.E.C. / any other equivalent Standards/recommendations of the Gasifier Action Research Projects (GARP) under MNES, Govt. of India.

7.2 COMMISSIONING

After the erection and testing of the equipment/works as per above, commissioning of the plant and works, should be carried out to ensure activities of functional working of the complete system after erection and testing, including tuning or adjustment of the equipment for optimum performance and demonstrating to the Purchaser that the equipment performance meets the requirements of the specifications.

7.3 ACCEPTANCE TESTS AT SITE

It is proposed to carry out tests to obtain the guaranteed out put and efficiency at the site as per the recommendations of the standards.


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CHAPTER – 8 PROJECT IMPLIMENTATION STRATAGY

8.1 GENERAL

The project is located in a remote area, where coordination with various organization is essential and hence. A three-tier arrangement is proposed for project implementation.

8.2 ARRANGEMENT

8.2.1 Nodal Agency WEREDA, Kolkata will be the Nodal Agency, which will have the following functions: i. Obtaining project approval form MNES, Government of India. ii. Receiving funds from MNES and disbursement thereof as required. iii. Coordination with the West Bengal Forest Department at various levels. iv. Arrangement of land for installation of the Power Plant and for the plantation

of Subabool, over a 38 Ha land. v. Preparation of Bid document as per the model specifications to be issued by

the MNES, floating tender & processing it, placing order and overall supervision of the project implementation.

vi. Overall coordination for project implementation and its Operation and Maintenance.

8.2.2 West Bengal Forest Department Following cooperation and coordination will be sought from West Bengal Forest Department: i. Creating awareness and interest amongst the villagers. ii. Motivation and formation of Village Energy Committee (VEC) or motivating

the existing Van Samiti to serve as or make VEC. iii. Granting permission to Van Samiti to use Van Samiti land for plantation of

Subabul and/or placement of power plant. iv. Monitoring and coordination as required for project success.

8.2.3 Village Energy Committee The VEC is proposed to carry out the following functions:

i. Motivation and creating interest amongst the villagers for success of the project.

ii. Collection of initial contribution from the villagers towards installation of the Plant and the System.

iii. Collection of monthly payment from the users @ of Rs. 150.00/pm from 5 point load connections and Rs. 100.00 from 3 point load connections or as may be settled by.

iv. Arrangement for plantation for continuous availability of Biomass (in cooperation and coordination with the West Bengal Forest Department, VEC and accepted by WEREDA): a. Collection of wood (Shrubs) from the surroundings for bio-gassifers, for

the first three years. b. Preparation of ground, sowing the seeds, watering, fertilizer input, use of

pesticide if required etc. c. Transplantation in the plots, d. Watering, routine after-care.


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e. Watch and ward. f. Annual cleaning of the area. g. Harvesting by rotation. h. Supplying of the plants logs to the Biomass store shed.

v. Arrangement and supervision of the record. vi. Arrangement / appointment of manager, operators etc. for running of the plant

and system as required. vii. Operation of Bank Account.


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CHAPTER – 9 CONSTRUCTION PROGRAMME

9.1 PRE-CONSTRUCTION ACTIVITIES

Pre-construction activities, viz: preparation of bid-document, purchase of bid-document by prospective bidders, study and submission of bid will take some time. It will be followed by opening of bid, its finalization, and placement of order and signing of contract. A period of 3 months is considered sufficient for these activities.

9.2 CONSTRUCTION ACTIVITIES/PERIOD

Construction activities have been shown in the Bar Chart (Fig. 22). The period for various construction activities have been taken as below: Days i. Contractors mobilization 15 ii. Survey & Investigation 15 iii. Preparation of Drawings & Documents & Submission 30 iv. Checking of Drawings, Documents & Approval 30 v. Construction of Civil Works 60 vi. Manufacture & Supply of Equipment, Material F.O.R. Site 75 vii. Installation of Gasifier System 30 viii. Installation of Generator & Auxiliaries 15 ix. Installation of Control, Protection & Metering System 15 x. Installation of Distribution System 30 xi. Installation of House Wiring & Meters (Where necessary) 30 xii. Testing & Commissioning 30 xiii. Others Works 15 xiv. Trial Run 30

Trial run period of 15 days has been considered to ensure safe and reliable operation of the plant as it has been noticed that at times the plant is erected & commissioned but then it goes out of operation for some reason or the other and then, the plant remains idle for a considerable period before being put back on operation. The place being remote, located deep in the forest and connected through kachcha forest road which becomes problematic during monsoons and rainy days, some period is likely to be lost causing delays. Some time margin has been considered for the same. However, the contractor may finish the whole work in lesser period if possible. The O & M will start after successful commissioning and operational trial of the plant and the system.


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9.3 BIOMASS SUPPLY FOR THE PLANT The Subabool plantation is going to take some time and additional period is required for the growth to the size enough for use. It is proposed that plantation be made immediately after the survey and investigation work is over. During the period of initial run of the plant, and the initial three years period, the supply may be taken from the surroundings and the forest. After three years period the Subabool plots will have sufficient quantity of Biomass and it will not be required to be taken from the forest.

9.4 CONTRACTUAL PERIOD OF O & M

The O & M is proposed to be carried out by the contractor for initial 5 years and thereafter the plant will be run by the villagers.


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CHAPTER -10 ESTIMATE AND FINANCIAL ANALYSIS

10.1 COST OF THE PLANT AND SYSTEM

The cost of the civil works, plant and the system, is shown in Tables – 10.2, 10.3, 10.4, 10.5 & 10.6 the over all cost estimate in Table – 10.1.

TABLE 10.1 : COST ESTIMATE

Sl. No.

Items Cost (Rs. in Lacs)

1 2 3 I Works A Preliminary 0.500 B Land (as per Table 10.2) 0.000

C Civil Works (as per Table 10.3) 33.62

J Power Plant System (as per Table 10.4) 42.34

H Distribution System (as per Table 10.5) 4.710

K Buildings Nil

M Plantation (Subabul Plantation for Biomass) 4.160

O Miscellaneous 0.000

Total I – Woks 85.330

I Establishment (2% of I works excluding Buildings) 1.707

II Suspense Nil

III Receipts and recoveries Nil

IV Indirect Charges (1% of I – works for Audits Accounts) 0.853

Total Project Cost 87.890


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TABLE – 10.2: COST OF LAND

Sl. No.

Item Unit Qty. Rate (Rs.

Lacs)

Amount (Rs. Lacs)

1 2 3 4 5 6 1. Land for Biomass

Power Plant Sq. m 1000 0.001 0.00

To be provide by villagers 2. Land for Subabul

Plantation Ha 38 0.200 0.00

To be provide by van samiti andforest department or waste landreclamation board.

Total 0.00

TABLE – 10.3: COST OF CIVIL WORKS

Sl. No.

Item Unit Qty. Rate (Rs.

Lacs)

Amount (Rs. Lacs)

1 2 3 4 5 6 1. 5.0 m x 10.0 m Biomass store shed with

open yard (6.0 m x 10.0 m) Sq. m 50 0.05 2.500

2. Filter Shed 8.75 m x 5.0 m x 5.0 m 218.75 0.020 4.375 3. Gasifier Shed with foundation of gassifier

unit 5.0 m x 5.0 x 8.0 m gasifier shed (as per drg.)

Sq. m 200 0.015 5.000

4. Power house building 10.0 m x 6.0 m x 3.50 m (As per drg.)

Sq. m 210 0.08 16.80

5. Control Room 3.0 m x 3.0 m x 3.50 m (As per drg.)

Sq. m 31.5 0.08 2.520

6. Toilet (1.5m X 3.0 m) Sq. m 4.50 0.117 0.525 7. Water Supply System LS - - 0.500 8. Over head water storage (1000 l, PVC

Tank) at a height of 6 m on fabricated platform

LS - - 0.750

9. Cooling pong 5.0 m x 2.50 m x 1.50 m LS - - 0.250 10. Approach Road LS 0.200 11. Miscellaneous works LS 0.200

Total 33.62


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TABLE – 10.4: COST OF THE PLANT

Sl. No.

Item Unit Qty. Rate (Rs. Lacs)

Amount (Rs. Lacs)

1 2 3 4 5 6 1. Woody biomass gassifier along with 100%

producer gas based engine with generator to give net output of 25 kW along with basic Gassifier accessories & auxiliaries with a double valve assembly for online ash charcoal removal system, Gassifier & engine control panel along with Ampere, volt, frequency and kWh meter as well as load panel for load distribution, and complete gas piping along with valves from gassifier to gas engine.

Set 2 17.20 34.40

2. Wood drying arrangement (Based on Engine Exhaust)

Set 1 0.50 0.500

3. Cooling System Complete pump, piping etc. LS - - 0.500 4. Biomass Cutter No. 1 0.260 0.260 5. Moisture Meter No. 1 0.050 0.050 6. Earthing Kit Set 1 0.150 0.150 7. Auxiliary Genset No. 1 1.650 1.650 8. Skip Charger for Biomass Feeding Set 2 0.750 1.500 9. Chain Pulley Block Set 1 0.330 0.330 10. Miscellaneous LS - 2.000 11. Installation, Commissioning Training of

staff including Service Tax LS - - 1.000

Total 42.34

TABLE – 10.5: COST OF DISTRIBUTION SYSTEM

Sl. No.


Amount (Rs. Lacs)

1 2 3 4 5 6 1. L T Distribution Line, km 2.5 1.00 2.50 2. Service Connections Nos. 201 0.01 2.01 3. Street Lights Nos. 20 0.01 0.20 Total 4.71


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TABLE – 10.6: COST OF THE BIOMASS DEVELOPMENT PLAN

Sl. No.


Amount (Rs. Lacs)

1 2 3 4 5 6 1. Plantation of saplings No. 38 Ha 0.09 3.420 2. Training Etc. LS - - 0.240 3. Miscellaneous including Subabul Nursery

etc. LS - - 0.500

Total 4.160 10.2 FUNDING FOR CONSTRUCTION OF PLANT Rs. Lacs

i. By Grant From MNES : 18.02 ii. Contribution by Villagers @ Rs. 1000/per HH : 2.01 iii. Contribution by Nodal Agency : 67.860

Total 87.890 10.3 FINANCIAL ANALYSIS

The financial analysis has been carried out as per Tables –10.7, 10.8, 10.9 & 10.10. The cost of generation and the results are given below:

10.3.1 Cost Of Generation

i. Without Subsidy Rs./kWh a. At 80% LF : 15.658 b. At 60% LF : 20.878

ii. With Subsidy Rs./kWh a. At 80% LF : 13.473

b. At 60% LF : 17.964


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TABLE 10.7: COST OF GENERATION WITHOUT SUBSIDY

Sl. No. Items Rs. In Lacs

1 2 3 1 Project Cost 87.890 2 Annual Interest during Construction 2.900

3 Total Project Cost 90.790

4 Annual working expenses (as per table 10.9) 5.108 5 Interest @ 12 % on total project cost 10.895 6 Total annual expenses 16.003 7 Annual generation at power house (Million Units) i. At 80% Load Factor 0.1022 ii. At 60% Load Factor 0.0767 8 Cost of generation per kWh (in Rs) i. At 80 % Load Factor Rs. 15.658 ii. At 60% Load Factor Rs. 20.878


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TABLE 10.8 : COST OF GENERATION WITH SUBSIDY

Sl. No. Items Rs. in Lacs 1 2 3 1 Project Cost 87.890 2 Capital Subsidy As per MNES 18.020 3 Balance Project Cost 69.870 4 Annual Interest during Construction 2.306

5 Total Project Cost 72.176

6 Interest @ 12 % on total project cost 8.661 7 Annual working expenses ( as per table 10.9) 5.108 8 Total annual expenses 13.769 9 Annual generation at power house (Million Units) i. At 80% Load Factor 0.1022 ii. At 60% Load Factor 0.0767 10 Cost of generation per kWh (in Rs) i. At 80 % Load Factor Rs. 13.473

ii. At 60% Load Factor Rs. 17.964


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TABLE 10.9 : STATEMENT OF YEARLY WORKING EXPENSES Sl. No.

Items Cost (Rs. In Lacs)

1 2 3 1 Operation cost @ 1% of works cost 0.879

2 Maintenance cost of C-works @ 1% 0.336

3 Maintenance of E&M works @ 2% 0.941

4 Annual depreciation charges (as per Table – 10.10) 2.952

Total 5.108


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TABLE 10.10: ANNUAL DEPRECIATION OF ASSETS

Sl. No.

Items Life in years

Cost (Rs. Lacs) Rate of Depreciation in %

Depreciation Rs. Lacs

1 2 3 4 5 6 1 Land Infinity 0.00 NIL NIL 2 Civil Works 35 33.62 3.40 1.143 3 Plant & System 35 42.34 3.40 1.440 4 LT Distribution

System 25 4.71 7.84 0.369

Total 2.952

TABLE 10.11 CALCULATION OF SUBSIDY FROM MNES

Sl. No.

Items Cost (Rs. In Lacs)

1 For Biomass Gasifier System 13.50 2 For internal wiring house hold @ Rs. 1500/HH for 201 HH 3.02 3. From regular supply of biomass 1.50 Total 18.02


39

CHAPTER -11 OPERATION AND MAINTENANCE OF PLANT & SYSTEM

11.1 GENERAL

After the plant and system is tested commissioned and the trial period is over, the operation and maintenance for 5 years period will be the responsibility of the contractor who has supplied, erected tested and commissioned the plant and the system. The contractor may net use100% of his own staff and may require certain number of additional persons for managing O&M under the guidance of his limited staff. The Village Energy Committee (VEC) may arrange for the same from amongst the people of the village, depending on the age, physical so mental health, willingness and the educational qualifications.

11.2 FORMATION OF COMMITTEE FOR SUPERVISION OF O & M

i. Executive Committee The VEC will make an Executive Committee of 5 persons which will supervise and monitor: a. Day to day functioning of the plant & system b. Monitor day to collection of revenue & Expenditure

ii. Staff Following Staff is proposed to be appointed by VEC from amongst the villagers: a. Manager : 1 No. b. Operational Staff : 6 Nos.

iii. Record Keeping Following record is suggested to be kept and maintained by the VEC.

a. Daily wood stock receipt indicating: Sl. No., Date Name of Villager and Quantity (kg)/Rate/Value

b. Stock Register recording : Sl. No., Date, Quantity Received c. Issue Register: Recording Sl. No., Date, Quantity issued and signatures of the

receiver d. Ledger showing daily receipt and issue of wood e. Cash receipt register f. Cash book g. Ledger h. Bank Pass Book & Cheque Book i. General Stock & Issue Register j. Register for Consumables

iv. Supervision & Maintenance of Record a. The manager will keep maintain the record, write cash book & maintain the

account b. VEC executive will check the accounts monthly c. General Meeting of VEC will be held every quarter in which manager will place

before it the records, accounts and status of the plant. d. An annual audit of accounts assets and liabilities will be got carried out by a

competent chartered Account appointed for the purpose by the Nodal Agency Appropriate action will be taken by the Nodal Agency after careful examination.


40

CHAPTER – 12 ENVIRONMENTAL IMPACT AND BENEFITS

12.1 ENVIRONMENTAL IMPACTS

The non-polluting effluents are discharged from the gassifier, which after settling are reused.

i. Water is re-circulated in closed loop from cooling pond to gassifier scrubber. One has to replenish water pond to compensate evaporation losses and that depends upon the duration of operation in a day, usually, ½ liter of water per unit of electricity generated is to be added as make up water.

ii. Sediment free water can be used for gassifier/cooling pond and hence, it does not require any special water treatment. Whereas, occasionally pH of water is to be rectified.

iii. The other discharges from gasifier are charcoal and ash. Both are of biological nature and biodegradable. 10% dry charcoal can be used again in gasifier while rest can be used as cooking fuel or as an activated carbon in air dryer or as earthing material in electrical towers/connections. Ash can be used as filling materials in large pits or briquettes of ash can be made and sold as fuel cake.

iv. Gas from gasifier is fed directly into engine without any atmospheric discharge while flare is given to occasionally check the quality of gas generated in gasifier and during the stoppage of the system.

v. The major gaseous emission from the power pack is from engine exhaust only. Exhaust from gas engine using producer gas is cleaner than conventional fuel due to absence of sulphur in biomass. The suspended particulate matter in these exhaust gases is always insignificant.

vi. Gasifier being a renewable source of energy equipment, is considered greener technology free from any major environmentally adverse effects.

vii. Gasifier does not have any noise making components except motors, of small capacity. viii. Alternator/engine will also cause some noise but it will be well within the limits. ix. The use of wood in the gassifier for the first three years will damage the vegetation of

the area. Only Putus and Kaknauda shrubs will used as biomass in the gassifier. These shrubs are not considered healthy for the growth of the forest and are removed periodically. Thus the removed of these shrubs will enhance the growth of Sal trees in the forest.

12.2 BENEFITS

i. With the provision of electricity in the village, the life of backward and Harijan Community constituting the population of the village will be uplifted.

ii. Provision of electricity will provide opportunities to the villagers to have cottage industries. This will enhance their economic status.

iii. School going children will have better studying conditions in the homes. iv. With the provision of power in the area, the pressure on wood will reduce considerably. v. With the betterment of lining conditions due to cooperation from the forest department,

the people will have a different attitude towards the forest resources which will ultimately result in saving the forest.

LIST OF PERSONNEL INVOLVEMENT

I. AHEC, IIT, ROORKEE

1. Sri Arun Kumar, Head, AHEC

2. Sri M. K. Singhal, SSO, AHEC

3. Sri Vijay Saini, SRF, AHEC

4. Sri Chandan Kumar, Fellow ‘A’, AHEC II. CONSULTANTS

1. Dr. G.C.S. Gaur, Former Faculty Member UOR Roorkee

2. Sri Y. S. Jadaun, Former Chief Engineer (UPSEB) III. ASSISTANTS

1. Sri R. K. Singhal, Technical Assistant

2. Sri Chandarpal Singh, Senior Attendant

Discussion during fieldwork were held with: IV. WEST BENGAL RENEWABLE ENERGY DEVELOPMENT AGENCY

1. Sri S. P Gon Chaudhary, Director

2. Sri Amitabh Sen, SE

3. Sri S. Biswas, A.D.

V. GRAM VAN SAMITI SHIKARPUR

1. Sri Uday Das

2. Sri Gur Naiya

Fig. 1.1 Map Showing Location of Sikarpur Village Distt. 24 South Pargana (West Bengal)

Project Site Sagar IslandProject Site Sagar Island

West Bengal

To

Kolk

ata

Lot No. 8Ferry pointLot No. 8

Ferry point

Project SiteProject Site