Santa Rita Solar Power Project - PG&E, Pacific Gas and ... · Integrated Solar Power Project....

General Services Agency: Slide General Services Agency: Slide 11

Self-Generation Incentive Program (SGIP) WorkshopSan Ramon, CA

Santa Rita Jail Solar Power ProjectA Customer’s Perspective

October 17, 2003


What will be CoveredWhat will be Covered

Santa Rita Integrated Solar Power Project Overview

Decision Making Process

Installation Process

Results

Questions?


The Largest Rooftop Array in the CountryThe Largest Rooftop Array in the Country

1.18 mW Solar Power Array at Santa Rita Jail


Case Study: The Santa Rita Jail Integrated Solar Power ProjectCase Study: The Santa Rita Jail Integrated Solar Power Project


The Santa Rita Jail Integrated Solar Power Energy ProjectThe Santa Rita Jail Integrated Solar Power Energy Project

Consisting of Four Energy Conservation Measures

1.18 mW Solar Power Generation: the Nation’s largest roof top solar installation Variable Flow 850-ton Centralized Chilled Water Plant (Air-Conditioning) UpgradeCool Roof ResurfacingSmart Energy Management System for Verification


Santa Rita Jail Aerial ViewSanta Rita Jail Aerial View


Santa Rita Jail, Dublin, CASanta Rita Jail, Dublin, CA

Construction 1984-1989Occupied Space:

1 million sqft.Peak Electrical Load:

3.2 mW (8/00) 18 Housing Units4300 inmates513 Sheriff’s Dept. staff106 GSA staff


Santa Rita Jail’s July 2001 Electric BillSanta Rita Jail’s July 2001 Electric Bill

Billing Summary - E20P Non-FirmService Charge $ 500.00Demand Charges $ 23,554.50Energy Charges $ 65,048.18Economic Stimulus Credit $ -6,048.24Power Factor Adjustment $ 498.13

Total of OAS $ 83,520.57

Non-residential Energy Procurement Surcharge $ 14,047.62Energy Surcharge $ 63,580.19Total Pre-Tax Billed Amount $161,175.38


Decision Making TimelineDecision Making Timeline

May 2000 Powerlight Tours SRJSeptember 2000 Powerlight Submits Initial ProposalNovember 2000 Final Proposal AcceptedDecember 2000: Submitted AB970 Grant BidsDecember 2000: GSA Approves Recommendation to BOSJanuary 2001: BOS Approves Project


How did Alameda County finance this project?How did Alameda County finance this project?

Project Construction Costs1.18 mW Solar Array $8,200,000Chilled Water Plant Retrofit $1,000,000Cool Roof $1,100,000

Total Project Costs $10,300,000



IncentivesCEC Buydown Grant @ $4.50/W $2,560,000PG&E’s Self-Generation Grant $1,770,000AB970 Grant, Solar $ 306,000AB970 Grant, Smart Controls $ 84,000AB970 Grant, Cool Roofs $ 45,000CPUC Cross-cutting Grant $ 250,000AB29X Early Project Completion $ 30,000Total Incentives $5,045,000



Cost to the CountyTotal Construction Costs $10,300,000

Less Incentives $5,045,000Energy Fund $1,193,000Major Maintenance $1,800,000First year savings $ 412,000CEC Loan @ 6.0% Interest $ 780,000CEC Loan @ 3.0% Interest $1,070,000


Construction TimelineConstruction Timeline

March 2001: Construction Begins

July 2001: 530 kW Solar Power Operational – Phase 1

August 2001: BOS approves Phase 2 Expansion of the Solar Power Project

October 2001 Solar Power Operational Phase 2

Dec 2001: BOS approves Phase 3 expansion Solar Power Project

April 2002: Solar Power Operational - Phase 3


How are we producing electricity from the sun?How are we producing electricity from the sun?


Simple Installation: No Roof PenetrationsSimple Installation: No Roof Penetrations


Simple Installation: Interconnecting with the Building’s Electrical SystemSimple Installation: Interconnecting with the Building’s Electrical System


Measurement & VerificationMeasurement & Verification


Solar Peak Load Reduction Solar Peak Load Reduction

Utility Company’s Summer Peak Time ScheduleMay 1 - Oct 31, 12:00 noon to 6:00 p.m. M-F

Summer Peak Period Demand Charges$11.80 / kW

Summer Maximum Demand Charges$2.55 / kW


Summer Peak Load ReductionSummer Peak Load Reduction

From Utility Electric Bill for Santa Rita Jail

Prior to Solar Project Installation:August 2000 Peak Demand: 3,212 kW

After Solar Project Installation:August 2003 Peak Demand: 2,154 kW

Total Peak Demand Reduction: August 2000 vs. August 2002: 1,058 kW (-33.0%)


Solar Production: Sunny DayJuly 7, 2003Solar Production: Sunny DayJuly 7, 2003


Summer Load Profile: July 6, 2003Summer Load Profile: July 6, 2003


Solar Production: Rainy DayMarch 3, 2003Solar Production: Rainy DayMarch 3, 2003


Winter Load Profile: March 3, 2003Winter Load Profile: March 3, 2003


Results2003 Solar Generation FactsResults2003 Solar Generation Facts

Peak Solar Electric Demand Generation: 879kWMay 7th @12:15 p.m.

Maximum % of Electricity Supplied by Solar: 45.3%May 9th @12:45 p.m.

Solar Electric Generation To Date: 1,160,737 kWhJanuary 2003 – September 2003:

Solar Electric Cost Savings To Date: $163,817January 2003 – September 2003:


Peak Solar Production: 879 kWMay 7, 2003 @ 12:15 p.m.Peak Solar Production: 879 kWMay 7, 2003 @ 12:15 p.m.


Peak Solar Production: 45.3% of Building Load on May 9, 2003 @ 12:45 p.m.Peak Solar Production: 45.3% of Building Load on May 9, 2003 @ 12:45 p.m.


Solar Peak Load Reduction & Cost SavingsSolar Peak Load Reduction & Cost Savings

May: 598kW, $5,550June: 578kW, $7,891July: 477kW, $6,446August: 359kW, $5,360September: 510kW, $6,725October: 416kW, $6,200 (est.)Total Summer Demand Savings: $38,172


Santa Rita Solar Project FactsSanta Rita Solar Project Facts

1.4 million kWh generated annually and 34.4 million kWh over the 25-year life of the system$211,000 Annual Cost Savings from solar generation and $207,000 in Annual Energy Efficiency Cost SavingsTotal area covers 3 acres of roofMaximum solar generation: 879 kWacMaximum monthly demand savings: 598 kWac$0.053/kWh (fixed) generated electrical power for 25 years with subsidies from the energy efficiency measures


Awards Alameda County’s Energy ProgramAwards Alameda County’s Energy Program

2002 Green Power Leadership Award presented by the U.S. Environmental Protection 2002 Flex Your Power Energy Award presented by the State of California, the 2002 Energy Efficient Building Award for Best Institutional Project from Energy User News2002 Challenge Award at the California State Association of Counties (CSAC) 2002 California Governor’s Environmental and Economic Leadership Award.


Sunset over the Solar Power System at Santa Rita JailSunset over the Solar Power System at Santa Rita Jail

Matthew Muniz, P.E., Energy Program Manager County of Alameda, GSA/TSD, (510) 208-9523email: [email protected]

Santa Rita Solar Power Project - PG&E, Pacific Gas and ... · Integrated Solar Power Project....

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