twg iii analysis of energy saving electricity in ......grand legi hotel mataram, ntb 26 feb –2...

UNDIP TEAMTECHNICAL WORKING GROUP III :

ANALYSIS OF ENERGY SAVING

ELECTRICITY IN CENTRAL JAVA

Grand Legi Hotel Mataram, NTB 26 Feb – 2 March 2011

GENERAL INFORMATION OF CENTRAL JAVA PROVINCE

2

According to PLN statistic data costumers in

Central Java increase about 3.5 % every years.

That makes the usage of electrical energy

growing steadily while indonesia is in state of

electrical crisis resulting in power cutting in

random area.

Because of that we need to saving the electrical

energy from household, business, and industry

sectors

3

SECTOR FOR EFFICIENCY

HOUSEHOLD

BUSINESS

INDUSTRY

4

The most costumers is in household sector

instead of another sectors. Because we

have a lot of customers from this sector,

we can save a lot of energy

HouseHold 5

LEVELTotal Costumer

HouseHold Business Industry

Type - 1 (450VA) 3,980,991.00 35,970.00 26.00

Type - 1 (900VA) 1,693,816.00 46,751.00 90.00

Type - 1 (1300VA) 215,524.00 34,785.00 123.00

Type - 1 (2200VA) 85,470.00 38,307.00 151.00

Type - 1 (The Rest) - - 996.00

Type - 2 23,553.00 40,794.00 2,194.00

Type - 3 2,841.00 199.00 900.00

Type - 4 - - 2.00

TOTAL 6,002,195.00 196,806.00 4,482.00

Comparison table between each sectors in Central Java

HouseHold

Reference: Data dan Statistik Tahun 2009 PT. PLN(Persero)

6

HouseHold

Business

Industry-

1,000,000.00

2,000,000.00

3,000,000.00

4,000,000.00

5,000,000.00

6,000,000.00

7,000,000.00

Total Costumer

6,002,195.00

196,806.00 4,482.00

HouseHold

Business

Industry

HouseHold 7

How to Save Energy in Household Sector?• Increasing the awareness of costumer’s electrical

usage

• Replacing the conventional tools with the energy

saving one

For example, bulb usage is one of energy

saving.

HouseHold 8

One way to increase the costumers awareness is time managing

Example : every houses must turning off 2 bulbs in specific time

(ex: 5pm – 10pm). That bulb has 10 watts. Then, every houses

can save about 100 watts.

And every months saving = Rp 9,607,413,426.75 = Rp 9.6

billion with just the awareness from citizen to turn bulb off from

this household sector, or this can save up to 18GWh

HouseHold 9

HouseHold

Number of bulb 2

Energy Consumed (W) 10

Time(hours) 5

Price (Rp./kWh) 533.55

Total Costumer 6,002,195

Saving energy (Rp.) 9,607,413,426.75

Saving energy (kWh) 18,006,585

Before Saving Energy After Saving Energy

Total Energy Sold (kWh) 6,424,319,568 6,406,312,983

Percentage saving : 0.28%

10

Saving energy : 9.6 Billion rupiah

HouseHold

6,395,000,000

6,400,000,000

6,405,000,000

6,410,000,000

6,415,000,000

6,420,000,000

6,425,000,000


6,424,319,568

6,406,312,983

Total energy sold 1 year(kWh)


11

Beside awareness, we can save the energy with another

method, that is with replacing the conventional bulb with the

energy-saving bulb

For example, every houses replace 3 conventional bulb with

the energy-saving bulb, then we can analyze for using energy-

saving bulb, we can save such amount of kW

HouseHold 12

Conventional Energy saving

Life time (hours) 1000.00 6000 - 10000

Replacement (month) 8 50

Energy consumed (W) 60 14

Price (Rp.) 5,000 32,500

Electric cost Rp./kWh (for 1300 VA) 694.48 694.48

watt hours per month 8,280 1,932

kWh per month 8.28 1.93

Monthly payment 5,750.31 1,341.74

Monthly pay for 3 bulbs 17,250.92 4,025.22

HouseHold 13

According to counting and analyzing in that chart, the

usage of energy-saving bulb in 5 months can give back

our money to buy the energy saving bulb.

Even, in next months, every houses make such a profit

after using the energy-saving bulb.

And, the important is, with using this energy-saving bulb,

Central Java can save money up to Rp 26.9 billion just

from household sector.

Percentage : 0.78%

HouseHold 14

This business sector is a sector which need a lot of

energy

According to PLN statistic data, the electric cost/kWh in

this sector is higher than other sector

Business 15

Business

LEVELPrice (Rp./kWh)


Type - 1 (450VA) 417.95 556.26 461.58

Type - 1 (900VA) 624.38 644.14 630.68

Type - 1 (1300VA) 694.48 708.70 747.67

Type - 1 (2200VA) 705.38 768.34 782.45

Type - 1 (The Rest) - - 1,048.29

Type - 2 791.36 1,037.42 832.28

Type - 3 1,186.33 839.33 649.46

Type - 4 - - 529.88

TOTAL 533.55 927.89 648.35


16

HouseHold

Business

Industry-

200.00

400.00

600.00

800.00

1,000.00

Rp./kWh

533.55

927.89

648.35

HouseHold

Business

Industry

Business 17

How to Save Energy in Business Sector?

like household sector, in business sector, there’s two ways to saving

energy

• Increasing the awareness of costumer’s electrical

usage


saving one

Business 18

To increase the costumers awareness is time managing

we can prevent energy wasting when not needed like

lamp, water heater in Hotel, etc

Example of management time in Santika Hotel

Semarang

Business 19

Saving Energy.xls

Kind of Hotel

Star Hotel Non Star Hotel

Unit 106 1090

Number of Bulb 10 4

Saving Time(hours) 5 5

Energy Consumed(W) 60 60

Electric Cost (Rp./kWh) 1037.42 708.7

Watt hours per month 9000 9000

kWh per month 9 9

Monthly Saving/bulb 9336.78 6378.3

Monthly Saving/ hotel Total Saving(Rp.)

STAR HOTEL 93,367.8 9,896,986.8

NON STAR HOTEL 25,513.2 27,809,388.0

ALL HOTEL 37,706,374.8

Business

Analysis of counting energy saving with power cutting in hotels in Central Java

20

The second method is replacing conventional with

energy saving electrical tools.

For example, saving energy can be done just with

replacing conventional bulb with energy-saving lamp, just

like in household sector.

In hotel business, we can replacing solar-fuel boiler with

heat exchanger

Business 21

For simulation, assume that every hotels replace 20

conventional bulbs with energy-saving bulbs.

Business

Conventional Energy saving

Life time (hours) 1000 6000 - 10000

Replacement (month) 8 50


Price (Rp.) 15,000 32,500







Electric cost Rp./kWh (for Type - 2) 1,037.42 1,037.42

Electric cost Rp./kWh (for Type - 3) 839.33 839.33

22

According to counting and analyzing every level from this

sector, will produce different saving in every level.

Here is a chart for energy saving every level from

replacing conventional bulb with energy-saving bulb

Business

Click

me

LEVEL Energy Saving (Rp.)

B1-450VA 773,129,389

B1-900VA 1,163,617,070

B1-1300VA 3,487,554,951

B1-2200VA 1,049,008,756

B - 2 1,635,261,145

B - 3 6,453,875

TOTAL B 8,115,025,185

23

comparison between conventional and energi save bulb.xlsxcomparison between conventional and energi save bulb.xlsx

773,129,389

1,163,617,070

3,487,554,951

1,049,008,756

1,635,261,145

6,453,875

(Rp.)

B1-450VA

B1-900VA

B1-1300VA

B1-2200VA

B - 2

B - 3

Business 24

Assume we replacing solar-fuel boiler with heat

exchanger.

With the data as below, we can analyze advantages of

using a heat exchanger than the boiler

Boiler Heat Exchanger

Price (Rp.) 35,000,000 42,000,000

Diesel Oil cost Rp 4,500 -

Diesel Oil cost (for 2500 VA) Rp 1,800/kWh -

watt hours per days 10,000 -

watt hours per month 300,000 -

kWh per month 300.00 -

Monthly payment 540,000.00 -

Business 25

From the above data obtained calculation results that by

replacing the heat exchanger obtained BEP (Break Event

Point) in the next 11 months from the time of initial

purchase.

And when calculated by the turn of heat exchanger the

importance of the profit of Rp 66.036.872/month, with the

amount of 106 hotels, include two star hotels to five star.

Business

LEVEL TOTAL HOTELS SAVING ENERGY(Rp)

B1-450VABecause non star hotel (450VA-1300VA) don't use heat

exchanger, we don't count themB1-900VA

B1-1300VA

B1-2200VA 51 31,900,056

B - 2 54 33,348,110

B - 3 1 788,706

JUMLAH B 106 66,036,872

26

This sector has the highest active work

than other sectors.

Electrical usage for production must be

active for about 12 hours a day.

This sector has also consume the highest

electrical power than other sectors

Industry 27

LEVELAvarage Time per Costumer


Type - 1 (450VA) 156 132 227

Type - 1 (900VA) 116 140 130

Type - 1 (1300VA) 133 141 125

Type - 1 (2200VA) 135 133 113

Type - 1 (The Rest) 0 0 77

Type - 2 132 145 154

Type - 3 116 187 319

Type - 4 0 0 334

Industry

Table comparison of active work between each sector in Central Java


28

Industry

Picture of comparison of active work between each sector in Central Java

0

50

100

150

200

250

300


Avarage Time per Costumer 1 year

Avarage Time per Costumer

29

LEVELkWh per costumer


Type - 1 (450VA) 70 59 102

Type - 1 (900VA) 105 126 117

Type - 1 (1300VA) 173 183 163

Type - 1 (2200VA) 297 292 249

Type - 1 (The Rest) - - 703

Type - 2 541 1,769 11,802

Type - 3 1,348 127,978 339,017

Type - 4 - - 22,740,000

Industry

kWh per costumer comparison between each sectors in Central Java

30

Industry

kWh per costumer

HouseHold

Business

Industry

kWh per costumer comparison between each sectors in Central Java

31

How to Save Energy in Business Sector?

Just like in household sector and business sector, there’s two ways to saving energy

• Increasing the awareness of costumer’s electrical

usage


saving one

Industry 32

We can save a lot of energy-saving with turning off non-

usage electrical tools. Assume every consumer of

industry sector turning off 6 bulbs in 5 hours.

After counting, this sector can save up to

Rp.156,930,955.20/month, if we convert it into kWh, we

can save up to 242,028 kWh/month.

Industry 33

Number of bulb 6

Energy Consumed (W) 60

Time(hours) 5

Price (Rp./kWh) 648.4

Total Costumer 4,482

Saving energy (Rp.)/month 156,930,955.20

Saving energy (kWh)/month 242,028


Total Energy Sold (kWh) 4,527,128,866 4,524,224,530

4,522,000,000

4,523,000,000

4,524,000,000

4,525,000,000

4,526,000,000

4,527,000,000

4,528,000,000

Before Saving Energy

After Saving Energy



Industry 34

Replacing the conventional tools with a

energy-saving tools can save a lot of

energy

Or replacing the diesel pump with the

electric pump.

Industry 35

In this sector, we also can replacing the conventional with

energy-saving bulbs.

Assume that every industry replacing 10 conventional

with 10 energy-saving bulbs

Industry 36

LEVELEnergy saving/month

(kWh)

Type - 1 (450VA) 8.92

Type - 1 (900VA) 12.18

Type - 1 (1300VA) 14.45

Type - 1 (2200VA) 15.12

Type - 1 (> 2200VA) 20.25

Type - 2 16.08

Type - 3 12.55

Type - 4 10.24

TOTAL 99.54

LEVELEnergy Saving/month

(Rp)

I1-450VA 231,861

I1-900VA 1,096,618

I1-1300VA 1,776,744

I1-2200VA 2,282,650

I1- >2200VA 16,015,359

I - 2 35,278,813

I - 3 11,292,856

I - 4 20,474

TOTAL I 56,682,044

Industry 37

-

50,000.00

100,000.00

150,000.00

200,000.00

250,000.00

Saving Energy in kWh/Year

Energy saving

Conventional

Industry 38

2,934,600,000,000

2,934,800,000,000

2,935,000,000,000

2,935,200,000,000

2,935,400,000,000

2,935,600,000,000

2,935,800,000,000

2,936,000,000,000

TOTAL I

Energy Saving per Year (Rp.)

ENERGY SAVING

BEFORE

Click

me

Industry 39

comparison between conventional and energi save bulb.xlsxcomparison between conventional and energi save bulb.xlsx

This method will have result in saving a lot of electrical energy.

Assume we replace 3 diesel oil pump with 3 electric pump.

Pump (with genset) Pump (with electric pump)

Price (Rp.) 3,850,000 5,000,000

Diesel Oil cost Rp 4,500 -


Diesel Oil cost (for 1300 VA) Rp 1,800/kWh -

Electric cost (for 1300 VA) - Rp.694.5/kWh

watt hours per days 2,356 2,356



Monthly payment 127,224.00 49,087.26

Monthly pay for 3 pump 381,672.00 147,261.78

Industry 40

From the data above, we know that with replacing diesel

oil pump with electric pump, we get profit around Rp 1.2

billion/month from the 5537 industries in Central Java.

(after we counting, we get BEP for 6 months).

Industry 41

LEVEL

TOTAL

INDUSTRY

SAVING

ENERGY(Rp)

I1-450VA 32 7,022,681

I1-900VA 111 24,309,281

I1-1300VA 152 33,222,683

I1-2200VA 187 40,785,571

I1-sisanya 1230 269,022,705

I - 2 2710 592,606,240

I - 3 1112 243,092,806

I - 4 2 540,206

JUMLAH I 5537 1,210,602,174

Industry 42

Saving in rupiah/month = Rp. 218,638.6

2,930,000,000,000

2,932,000,000,000

2,934,000,000,000

2,936,000,000,000

2,938,000,000,000

2,940,000,000,000

JUMLAH I

SAVING ENERGY

BEFORE

Industry 43

Electric General Activities ImplementedRealization

KWH/Year

Optimisation of lamps

Spinning 1 – 7

WV 3 Inspect

Reduction lamp at no machine area

Reduction lamp at no machine area

933.47

9.93

Reposition of lamps

Weaving 1A

Weaving 1B + 1 Prept

Weaving 4 Rebeamer + ball

warper

Reposition and reduction of lamps



134.31

94.32

108.60

Energy efficient lamps

Workshop Vehicle Dept

Outside lighting

Garden lamp of offices

Warehouse lamp canopy

Warehouse lamp canopy

Change Lp. HPL-N 250W to Lp. TL 1X36 W

LDR to Rotary Timer Relay (10 have- attach )

Change to Lp. HPL-N 125W dg lp SL 27 W

Change to Lp HPL-N 125W dg lp TL 2X40 W

Change to Lp HPL-N 250W dg lp TL 1X40 W

5.47

801.35

617.48

3.64

7.58

Industry 44


KWH/Year

Power Genset + PLN Optimisation of Cos Q and monitoring 957.24

Spinning 1

Optimisation of Dust filter stop 6 mc. @11 KW

for 24 hrs for carding464,238.37

Switching off carding motor during main

Cleaning cycle5,625.92

Stop dust filter blowing 2 mc.@30kw for 24 hrs 422,034.39

Spinning 1,2,3,4,5,6,7Installing timer to control empty tube conveyor

in winding13,245.70

Spinning 2

Optimisation of vaccum

Stop central blower 1 motor

30kw for 24 hrs in winding

211,017.19

Switching off carding motors during main

cleaning cycle6,329.84

Industry 45


KWH/Year

Spinning 3Switching off carding motors during main


Spinning 4 RY



Optimisation of supply air fan blowing 2 unit @

11 kw154,745.67

Spinning 4 RY, 5 , 6,7 Optimisation of blower TFO 2 unit @ 11 kw 921,441.60

Spinning 6Optimisation dust collector blowing 4motor 30kw

for 24 hrs/day844,070.15



3,090,186.37

In rupiah : 3,090,186.37 *Rp. 530= Rp. 1,637,798,776 = 1.6 Billion Rupiah/yearFor 1 industry

Industry 46


KWH/Year

Reposition of lamps

TFO & Winding SP 4Reposition and reduction of lamps 82,022

Energy efficient lamps

Change Lp. Iwata 250 W to Lp. Garden 125 W

Change Lp. HPL-N 250 W (kanopi) to Lp. TL

2x36 W

13,500

Change Lp. HPL-N 250 W to Lp. SON-H 220 W 108

Power PLNTo reduce KVA max /set cos Q 0,99 during

WBP 0,703 becomes 0.613 =1,060 KVAmax642,952.56

Room of Transfomer Spinning

Spinning 2

Spinning 4 + 6

Change exhaust fan with bird mesh 20,512.80

Change exhaust fan with bird mesh 56,448.00

Industry 47


KWH/Year

Compressor ST 2

SP 1, 2 , 5 & 6 optimisation of

transformer

Optimisation of transformers 17,600

Spinning 1

Modification in blening system to stop motor

Roller equipment during proces of Rayon

(3x0,37 KW during 24 hrs )

8,151.84

Spinning 1,2,4OE,5,6,7Stop Chiller according to process and better

outside condition9,340,500.00

Spinning 2

Stop Multi Mixer 2 mesin @ 8 KW during 24 hrs

Line 354,508.80

Line 2 49,776.00

Spinning 3Optimisation of Central Blower 1 motor 30 KW

Ampere total decrease +/- 10 Amp44,256.17

Industry 48


KWH/Year

Spinning 4 RY,4OE,5Stop Supply Air Fan MC. Wind 1x15 KW for 24

hrs/day1,052,028.00

Spinning 5 , 6 , 7Stop Return duct Blowing of east location 1x 30

KW for 24 hrs/day772,344.00

Spinning 6

Optimisation of air conditioning in Prep (Roving)

1x22KW for 24 hrs/day161,568.00

Stop Waste Dust Collection Blowing of south

location (2 x 11 KW)161,568.00

Stop Cooling Fan R.Trafo (6 x 0.37 KW) 13,586.40

Spinning 7

Optimisation of air conditioning in Drawing 2 x

22KW during 24 hrs/day296,208.00

Stop Supply Air Fan for mc. Winding- (1 x 18.5

KW)124,542.00

Industry 49


KWH/Year

Weaving 1A , 1B , 1 Prep Optimisation of lighting 487,604.20

Weaving 1A , 1 Prep , 2 , 3

Optimisation of air conditioning system ( 133.052

KWH / Month )2,421,881.28

Change new main motor 3 nos for somet

( 1528.2 KWh / Month )15,282.00

Stop Operational Blower 60 during yarn breakage (

@713,1 KWh / Month )42,786.00

Weaving 2Stop Operasional main motor 20 duringyarn

breakage ( 2.280 KWh)27,360.00

Total 15,907,094.45

In rupiah : 15,907,094.45 *Rp. 530= Rp. 8,430,760,059 = 8,43 Billion Rupiah/yearFor 1 industry

Industry 50

0 Year First Year Second Year

Energy Consumption kW

h

348.647.205 336.947.485 310.876.940

Saving kW

h

0 (3.090.186,37) (15.907.094,45)

Precentage ( % ) (0.91) (5.1)

In Rupiah (Billion/Year) 1.6 8,43

Industry 51

twg iii analysis of energy saving electricity in ......grand legi hotel mataram, ntb 26 feb –2...

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