AN AIESEC & ECOZEN SOLUTIONS INITIATIVE

2010

Energy Audit,

IIT Kharagpur Preliminary Audit Synopsis

U N D E R T H E G U I D A N C E O F P R O F E S S O R N . K . K I S H O R E & D R . P B A J P A I

2

Introduction

The energy consumption facts for IIT Kharagpur, including the Institute campus and the off-campus pumping stations at

Anicut and Balrampur are:

Gross Annual Energy Consumption: 1,38,000 GJ (95,000 GJ in electricity + 43,000 GJ in fossil fuels)

Total Annual Electricity Consumption: 2,64,28,079 kWh (Mar ’09 – Feb ’10)

Approximate per capita consumption of electricity: 2402 kWh/year

Total Annual Electricity Bill: INR 11,18,20,656

Gross Annual Carbon footprint in equivalent tons of CO2 : 25,000 tons

Energy Balance of IIT Kharagpur

Fi gure 1: Energy Balance of IIT Kharagpur

The usage of electricity in IIT Kharagpur Campus is distributed as given below:

Figure 1: Area wise distribution Figure 2: Sector wise distribution

IIT Kharagpur Campus + Pumping Stations

Total Annual Electricity Consumption

95 ,000 GJ/yr [2,64,28,079 kWh/yr]

Pumps

2.5%

Illumination

25.65%

Air Circulation

4.48%

Computers

9.37%

HVAC

26%

Lab apparatus

and machines

35%

Fossil Fuels

[43 TJ]

Academic

Residential

Comertial

Others

26.01%

19.80%

5.86%9.37%

4.48%

34.49%

HVAC

Illumination

Street Lights

Computer

Air Circulation

Others

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Proposals for reducing energy consumption and energy wastage – [Infrastructural Changes]

o Proposal 1:

• Replacement of HPSV streetlights by LED lights.What

• Streetlights currently account for 5.8% of IITKharagpur’s electricity bill.

• LED’s are up to 52% more efficient and 1.4 timeseconomical in the long run.

Why

• Phase I: Replacement along Shahid TarakeshwarRoad and 2.2 circuit.

• Replacement would lead to approx. 58% savings inthe target patch.

How

• Phase I investment: INR 36.8 lacs

• Simple payback period: 53 monthsCost

• Modernization of corridor illumination system

• Install motion sensors, master switches and timers

What

• Contributes 1.81 % to Kharagpur’s electricity bill, excluding Hostels.

• No. of appliances are way more than required.Why

• Replace tubes with CFL's

• Motion sensors in low utilization areas

• Master switches in high utilization areasHow

• Phase I: INR 92,000 for installation of motion sensors in 60% of corridors

• INR 50,000 approx. for master switchesCost

Proposal

1 Infrastructural

Proposal

2

Infrastructural

4

o Proposal 1:

• Renovation of illumination system of Central Library

• Motion sensors, reduction in lightsWhat

• Certain areas in central library have light intensity twice as required

• Utilization at many places is extremely lowWhy

• Reducing the number of lights

• Using motion sensors

• Repositioning lights in some placesHow

• Phase I: INR 50,000 approx. for motion sensors

• INR: 50,000 for rewiringCost

• Installation of online energy meters for academiccomplex and halls.What

•The Academic Complex and halls together accountfor 67% of the institute's total electricityconsumption.

•Lack of awareness and energy accounting.Why

• A web portal to monitor and display energyconsumption in real time.

• Increase in awareness and consciousness facilitatingwastage reduction

How

• Phase I investment: INR 16.4 lacs (approx)

• Payback period: Depends on users' initiativesCost

Proposal

3

Infrastructural

Proposal

4

Infrastructural

5

Proposals for reducing energy consumption and energy wastage – [Behavioral Changes]

o Proposal 1:

•Assigning targets to departments and halls to reduce consumptionWhat

•Departments are not aware of the wastages occurring due to poor monitoring

•No monitoring implies no awareness amongst students

Why

•Holding inter-hall contests as an incentive to initiateenergy conservation.

•Similarly having a rating system for departments andproviding incentives accordingly.

How

•Launching an aggressive 'Go Green' Campaign.What

•Awareness among the IIT community is the first stepto ensure an energy efficient campus.

•IIT KGP should be a part of the world-wide GreenMovement

Why

•Vigorous campaigning via posters, presentations, competitions and workshops.How

Proposal

1 Behavioral

Proposal

2 Behavioral

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Total 861 tons (100%)

New Academic Complex =

510 (59.2%)

Central Library/Netaji Auditorium = 100 (11.6%)

Bio Technology Department = 80 (9.3%)

E & ECE Department = 80 (9.3%)

CSE Department = 45 (5.2%)

Remote Sensing

(ISRO) = 30 (3.5%)

Mechanical Engineering Department = 16 (1.9%)

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Distribution of tonnage Centralized Air-Conditioning plants in IIT Kharagpur campus

Distribution of Calculated Cooling load of New Academic complex (Total = 510 tons)

Takshila65%

Lecture Halls15%

Seminar Halls3%

Kalidas13%

SMST4%

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o Proposal 1:

• Installation of stand alone air conditioning system tohandle the cooling requirements of critical rooms inthe New Academic Complex

What

• To turn off the main chiller plant when only coolingof critical rooms is requiredWhy

•Long Distance Piping Packaged Air Conditioners(LDPPAC): 4 units of 22 tons each

•Verticool Split Air Conditioner (VSAC) : 7 units of 2.5tons , 11 units of 3.5 tons and 7 units of 4.5 tons

How

•LDPPC: Cost- INR. 26.40 lacs , Payback period- 8.5months

•VSAC: Cost- INR. 19.10 lacs, Payback period- 5.7months

Cost

•Usage of extra 510 tons available in the chiller plantof the New Academic Complex as district coolingplant

What

• Old and inefficient cooling systems in different partsof the campus

•Replacing them by more efficient chiller plant ofRamanujan Complex

Why

•Installation of underground insulated pipes alongwith pumps to supply chilled water to other smallplants of the campus

How

•Cost of installation:INR. 10 lacs

•Payback period: 2.4 yearsCost

Proposal

1 Infrastructural

Proposal

2

Infrastructural

8

Fossil Fuels Audit

The end usage of fossil fuels in IIT Kharagpur Campus is given below:

GJ/month Tons CO2/month

Static Sources 1708.8 126.4

Mobile Sources 2612.2 60.5

Figure 1: Energy Consumption among static and mobile sources

• To reduce inflitration

• To set inside temperature at 25 degree celcius

What

• To reduce extra cooling load of conditioned spaceWhy

• Creating awareness among people• Using spring loaded door instead of

sliding door. How

Proposal

3

Behavioral

9

Figure 2: Energy Consumption among static sources Figure 3: Energy Consumption among mobile sources

Figure 4: Distribution of Energy Consumption

LPG KEROSENE CHARCOAL DIESEL

Motorcycle59%

Auto Rickshaws

1%City Car17%

Heavyweight Vehicles

17%

Taxi6%

0

200

400

600

800

1000

1200

LPG KEROSENE CHARCOAL DIESEL

1158

5896

130

208

12 8 39

Ene

rgy

GJ/

mo

nth Hall of Residence

Restaurants

Techmarket

Main Complex

10

Proposals for reducing energy consumption and energy wastage – [Infrastructural Changes]

Proposal 1:

• Building Biogas plants to treat the food waste from mess kitchensWhat

• The biogas generated can be used as a substitute for LPGWhy

• Build two different Biogas Plants capabable of treating 650 kg/day of food waste eachHow

• Phase I investment: INR 3.25 lacs

• Simple payback period: 1 yearCost

•Installation of Solar cooker for boiling water in themess kitchensWhat

• Solar cookers provide an efficient and grean way toboil water

•LPG currently used for boiling water can be savedusing this renewable energy source

Why

• Installing a Scheffler type solar cooker and doingthe civil work involvedHow

•Phase I investment: INR 55,000

•Simple payback period: 3 yearsCost

Proposal

1 Infrastructural

Proposal

2

Infrastructural