HomeMy WebLinkAbout95.Special Presentation 12-14-16 Board Meeting - Peak Shaving Optimi L
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Peak Shaving Optimization
Strategy
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December 2016 i ►► ��/
1
Electricity Sources o
✓ Purchasing from Edison
■ Average cost in 2016: 9.3C/KWh
✓ Generating Electricity:
■ Digester gas (3.7 C/KWh) ►, �, ` A _�` ,,;
■ Natural gas 6.2 KWh T �
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2
Time of Da Electricity
Cost
June-September
PW IN" r
L Miid-peaj�, Off-Peak
Weekdays Weekdays Weekends
12pm — 6pm gam — 12pm Night time
6pm — 11pm
9C/kWh + 6C/kWh + 4.5C/kWh
Demand charge Demand charge No demand charge
3
2016 Strategy
OCSD's past practice during peak periods was to limit the amount of energy purchased
from the utility provider by generating additional electricity onsite between the hours
of 12pm to 6pm.
3
2016 Strategy
OCSD's past practice during peak periods was to limit the amount of energy purchased
from the utility provider by generating additional electricity onsite between the hours
of 12pm to 6pm.
2015
Extended operation of Central Generation facility during on-peak and mid-peak period:
SSSS
2016 IND
4
i nStrategy
O erat o Tool
In 2016 by installing catalytic convertors and gas conditioning facilities,
OCSD's limitation to use natural gas was lifted.
Tream Work
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�N
4
i nStrategy
O erat o Tool
In 2016 by installing catalytic convertors and gas conditioning facilities,
OCSD's limitation to use natural gas was lifted.
,FTZ -r.,
Team Work
F FA
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Operations : •
Maintenance
Costs
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4
a
4
i nStrategy
O erat o Tool
In 2016 by installing catalytic convertors and gas conditioning facilities,
OCSD's limitation to use natural gas was lifted.
MOW
IN
Edison
Electricity Team Work
Cost
Operations Maintenance
Costs
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Operation Strate
In 2016 . . . . gas conditioning facilities,
• gas was lifted.
MOW
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Ail
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Edison -
Electricity Team Work � -
Cost
Operations &
Maintenance ��
� Costs
Market
5
Monthly Electricity Plant 2
$2501000
$200,000
$150,000
$100,000
$50,000
$-
Jun Jul Aug Sep Jun Jul Aug Sep
2015 2016
y'
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5
t
Monthly Electricity Plant 2
$250,000
$200,000 Ave: $196,0
$150,000
$100,000
$50,00o Ave: $44,000
Jun Jul Aug Sep Jun Jul Aug Sep
2015 2016
5
Monthly Electricity
Costs
$250,000
$200,000
i
$150,000
$152,000 less
$100,000 compared to 2015
$50,000
$ IL F1
-
Jun Jul Aug Sep Jun Jul Aug Sep
2015 2016
6
Savings Summary
In summer 2015, peak-shaving resulted in $170,000 savings
In 2016, peak-shaving resulted in an additional saving of $550,000
Total net savings in summer 2016: $720,000
Questiois ?
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i nStrategy
O erat o Tool
COMPARISON OF OPTIONS FOR RUNNING ADDITIONAL ENGINE ON NATURAL GAS
Marketer's markup 1.84 Ave July 2015-Apr 2016
operating costs of l engine $fKWH $ 0.018
40,000 run-hour Overhaul costs per engine $ $ 750,000
120,000 run-hour Overhaul costs per engine $ $ 1,700,000
Engine Fuel Use thermsfkWh 0.107 Ave July 2013-Apr 2016
SCE winter $fKWH $ 0.06
OPTION KW KWHIYR ANNUAL Jan Feb Mat Apt May Jun Jul Aug Sep A Oat Now Bee
m w`o
NG projected 2016(EIA) m n
$11therms 0.2283 0.1389 0.1723 0.1313 0.1322 0.20 0.22788 0.2372 0.24248 m m 0.25174 0.27136 0.29914
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Pa Anse hum 5XT 3000 26,280,000 2,002,633 131,400 131,400 131,400 131,400 131,400 237,860 237,860 237,860 237,860 N a 131,400 131,400 131,400
my
3idEng1vre an AFG 3000 26,280,000 1,731,954 14S,216 132,531 121,312 129,S10 129,640 a 133,401 14S,035 149,057 151,335 a 155,330 163,805 175,783
Savings by running the third engine on Natural Gas t(13,816) (1,131) 10,088 1,830 1,760 104,459 92,825 88,603 86,525 (23,330) (32,405) (44,383)
Henry Hub Natural Gas Price On-peak $ 131,144 $ 131,144 $ 131,144 $ 131,144
SCE costs($) Mid-peak $ 50,308 $ 50,308 $ 50,308 $ 50,308
Off- eak $ 56,408 $ 56,408 $ 56,4081$ 56,408
summer Tyne
] )pgrmaw Savings by On-peak $ 108,181 $ 106,179 $ 105,4861$ 105,034
° running an Mid-peak $ 15,865 $ 12,861 $ 11,822 $ 11,234
° I --- etttra engine
Off-peak $ (19,587) $ (26,215) $ (28,506) $ (23.8041
3
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JanA15 JLLEnS .hnA18 Ju42818 JYFZm] lLLaH]
Ener Char es($IkWh) A sis-hour period each weekday from 12pm to 6pm
On- eak 1 $0.03133 On-peak: 21 weekdays I month µ_ ''4
Summer Mid-peak $0.06005 Operating a 3000kw generator
Off-peak $0.04503 A nine hour period each weekday from Sam tr.12prn,6pm t 1pm r r
Winter Mid-peak $0.06243 Mid-peak: 21 weekdays per month
Off-peak $0.04942 Operating a3000kw generator
Demand Char es($IkW) A nine-hour period each weekday from llpm to 8arn and all a:eek:end
On- eak $20.85 Off-peak 21 weekdays I month+9.5 weekend days I month=417 total hours per month
Summer Mid- eak $5.42 Operating a 3000kw generator ���
5
i nStrategy
O erat o Tool
COAN410SON OF OPTIONS FOR RUNNING ADDITIONAL ENGINE ON NATURAL GAS
rketer's markup 1.84 Ave July 2015-Apr 20
operating costs of l engine $1KWH $ 0.018 CenGen operating costs
40,000 run-hour Overhaul costs per engine $ $ 750,000
N.00run-hourOveihaul costs per engine $ $ 1,700,000
Engine se thermslkWh 0.107 AveJuly2 pr2016
SCE winter $IKWH S
OPTION KW KWHIYR ANNUAL Jan Feb Mar Apr May Jun Jul Aug Sep A Oat Now Bee
m w`i5
NG projected 2016(EIA) m n
$Itherms 0.2283 0.1389 0.1723 0.1313 0.1322 0.20 0.22788 0.2372 0.24248 m m 0.25174 0.27138 0.29314
r E
Pa Anse hum 5CE 3000 26,280,000 2,002,633 131,400 131,400 131,400 131,400 131,400 237,860 237,860 237,860 237,860 to a 131,400 131,400 131,400
my
3idErr_V r an AEG 30001 26,280,0001 1,731,9541 14S,2161 132,5311 121,3121 129510 129,6401 133,4011 14S,0351 149,0571 151,335 a 155,3301 163,8051 175,783
Sagsvin by running the third engine on Natural Gas 1 (13,816) (1,131) 10,088 1,830 1,760 104,459 92,825 08,803 86,525 (23,330) (32,405) (44,383)
enry Hub Natural Gas Price SCE
S 131,144 $ 131,144 $ 131,144 $ 131,144
SCE costs($) Mid-peak S 50,308 S 50,3081$ 50,3081$ 50,3011
Off- eak $ 56,408 $ 56,408 $ 56,408 $ 56A
Id�i:... r. Summer Tyne
trdknr Savings by On-peak $ 108,181 $ 106,173 $ 105,486 $ 105,034
e ' running an Mid-peak $ 15,865 $ 12,861 $ 11,822 $ 11,234
5 eatraengine Off-peak $ (19,587) $ (26,215) $ (28,506) $ (29,804)
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Natural Gas Market Price, US Energy Information Administration
Edison rates
Charges($IkWh) A sim-hour period each weekday from 12pm to 6pm
On-peak $0.03139 On-peak: 21 weekdays I month
Summer Mid-peak $0.06005 Operating a 3000kw generator
Off-peak $0.04503 A nine hour period each weekday from Barn ti.12pm,6pm ti.11prn f
Winter Mid-peak $0.06243 Mid-peak: 21 weekdays per month 1
Off-peak $0.04342 Operating a3000kw generator
• •
Demand Char es($IkW) A nine-hour period each weekday from llpm to Barn and all a:eek:erid
Summer On- eak $20.85 Off-peak 21 weekdays I month+9.5 weekend days(month=417 total hours per month
Mid- eak $5.42 Operating a 3000kw generator
5
i nStrategy
O erat o Tool
CO RLSON OF OPTIONS FOR RUNNING ADDITIONAL ENGINE ON NATURAL GAS
rketer's markup 1.84 Ave July 2015-Apr 20
operating costs of l engine $IKWH $ 0.018 CenGen operating costs
40,000 run-hour Overhaul costs per engine $ $ 750,000
N.00run-hourOveihaul costs per engine $ $ 1,700,000
Engine se thermslkWh 0.107 AveJuly2 pr2016
SCE winter $IKWH S
OPTION KW KWHIYR ANNUAL Jan Feb Mar Apr May Jun Jul Aug Sep A Oat Now Bee
m w`o
NG projected 2016(EIA) m n
$1therms 0.2283 0.1389 0.1723 0.1313 0.1322 0.20 0.22788 0.2372 0.24248 m m 0.25174 0.27138 0.29314
r E
FI1=ha5e hum 5CE 3000 26,280,000 2,002,633 131,400 131,400 131,400 131,400 131,400 237,860 237,860 237,860 237,860 m a 131,400 131,400 131,400
my
3�Errgwre an A49 30001 26,280,0001 1,731,9541 14S,2161 132,5311 121,3121 129510 129,6401 133,4011 114S,0351 149,0571 151,335 a 155,3301 163,8051 175,783
Savings by running the third engine on Natural Gas (13,816) (1,131) 10,088 1,830 1,760 104,453 92,825 88,803 86,525 (23,930) (32,405) (44,383)
On-peak $ 131,144 $ 131,144 $ 131,144 144
enry Hub Natural Gas Price CE costs($1 Mid-peak $ 50,308 $ 50,308 $ 50,308 $ 50,
Off- eak $ 56,408 $ 56,408 $ 56,408 $ 56,408
5�mmer.ime Savings
t�onr Savings by On-peak $ 108,1811$ 106,1731$ 105,486 $ 105,094
e ' running an Mid-peak $ 15,8651$ 12,8611$ 11,822 $ 11,234
s -------- eatraengine Off-peak 1$ (19,587) $ (26,215) $ (28,506) $ (2
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..2(),5 u21115 A16 .12016 , 2o„ Ml7 Natural Gas Market Price
Edison rates
Char e01 $20.85 )
A sis-hour period each weekday from 12pm to 6pm
On-peak $0.03139 On-peak: 21 weekdays I month a "f
Summer k $0.06005 Operating a 3000kw enerator
Off-peak $0.04503 A nine hour period each weekday from Sam in 1�2pm,6prn ti.11pm
Winter Mid-peak $0.06243 Mid-peak: 21 weekdays per month
Off-peak $0.04342 Operating a3000kw generator
Demand Char A nine-hour period each weekday from 11pm to Barn and all a:eek:end
On-peak $20.85 Off-peak 21 weekdays I month+9.5 weekend days I month=417 total hours per monthSummer ak $5.42 Operating a 3000kw generator !?
n,
6
Plant 2
Weekdays, Summer 2016
Plant Demand (kWh)
9,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000
1,000
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour of the day
—Total Demand
6
Plant 2
Weekdays, Summer 2016
Plant Demand (kWh)
9,000
8,000
7,000
6,000
5,000
4,000
3,000
Mid-peak On-peak Mid-peak
2,000
1,000
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour of the day
—Total Demand
6
Plant 2
Weekdays, Summer 2016
Plant Demand (kWh)
9,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000
1,000
0
0 1 Z 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour of the day
Generated Imported —Total Demand
N A Ql 00 O N A Ol 00 O
O O O O O O O O O O
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