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HomeMy WebLinkAbout95.Special Presentation 12-14-16 Board Meeting - Peak Shaving Optimi L 46 15 _ No IkkIv -.� o� Peak Shaving Optimization Strategy I 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 � ti ,_ 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 r �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 r Operations : • Maintenance Costs µ' 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 µ' 4 • 1 a Vc�d r4 rF, I Operation Strate In 2016 . . . . gas conditioning facilities, • gas was lifted. MOW IN Ail • 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' IY I 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 ? <<`��>� �� � 1. � .. ! r G �,� � r.,g�/'� � �s '�P � J ���f-�iz��� � 5 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 r E 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 Y -- --- ----------------- 1- 8 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) e a ------------------- 1 - a Jarv2015 JLL2015 Jarv2018 JU12018 Jam2011 .A4a117 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 a r 2 __ ___ --- v ..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 O O O O O O O O O 00 O O O O O O O O O O O 8/1/2016 1 8/2/2016 1 MU 1 8/3/2016 1 0 8/4/2016 ♦� 8/5/2016 / 8/6/2016 8/7/2016 '�♦ (D 0 8/8/2016 I8/9/2016 f1 8/10/2016 rD 73 O (D C) * 8/11/2016 z 1 m 8/12/2016 0 (D z 8/13/2016 `�� Z 8/14/2016 j Q 8/15/2016 1� C: I 8/16/2016 ` N x 8/17/2016 / (p o * 8/18/2016 f 0 1 3 1 8/19/2016 t` rn O 1 8/20/2016 `� CL t Ln 8/21/2016 i 8/22/2016 ' � � V 8/23/2016 8/24/2016 f 8/25/2016 f 1 I^ 8/26/2016 8/27/2016 8/28/2016 P'1• 8/29/2016 8/30/2016 O 8/31/2016