DeAnza College Case Study Innovative, High Performing, Solar Tracking June 8, 2012
Presentation Outline DeAnza College s Project Objectives Meeting DeAnza College s Project Objectives Integration with District s Environmental Education Program 2
Project s Objectives Maximize Utility Cost Savings and Rebates for the District Integrate with Existing Campus Clean Energy Program Complement Campus Architecture and Functions, Including Monthly Flea Market Autocross Minimize Disruptions to the Campus Deliver Compelling Environmental Savings Accommodate Electric Vehicle Charging Incorporate an Educational Component for Students & Faculty 3
DeAnza College s Sustainability Committment De Anza College has long been committed to environmental sustainability. Through the work of its College Environmental Advisory Group (CEAG), De Anza in 2007 became the first community college in the nation to develop its own Sustainability Management Plan to guide continual improvement. Significant recent improvements include completely biodegradable containers and utensils in the cafeteria, drought-tolerant landscaping and weatherresponsive irrigation on the grounds. The installation of photovoltaic arrays on campus will produce almost half a million dollars annually in electricity savings 4
DeAnza College s Sustainability Committment Four of De Anza's new buildings have been certified as meeting national LEED building standards for environmental sustainability. The college's Environmental Studies Department, housed in the Kirsch Center for Environmental Studies, was the first "green" demonstration building in the California community colleges. The department has developed an extensive sustainability curriculum leading to certificates and degrees in four program areas. 5
DeAnza College Flea Market 6
DeAnza College Autocross 7
The Solution: SunPower s High Efficiency Elevated Tracker 1,146 kwp capacity, generating 2,290,000 kwh/year $1.3M in PG&E Rebate (over 5 years) $11.9M in Electric Savings (over 25 years) DeAnza College 1 MW SunPower Solar Electric Elevated Tracker Under Shade Tracking the Sun 8
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SunPower Cells SunPower s all-back contact, n-type solar cell is patented, hard to replicate and provides industry-leading efficiencies of 22.4% in production lines. All-Back Side Contacts Front Side (no gridlines) 11
SunPower High Efficiency Modules - 435 Watts per module - 20% Efficiency 12
SunPower T0 Tracker 13 13
SunPower T0 Tracker Single-axis tracking with backtracking to eliminate row-to-row shading 25% more energy per kwp capacity Minimal number of moving parts Designed to withstand 90 mph wind gusts from any direction 14
Tracking the Sun Enhances Peak Production 45.0% 40.0% Annual CF Summer CF 35.0% 30.0% 25.0% 20.0% 15.0% 10.0% 5.0% 0.0% Fixed Tilt T0 Tracker Capacity Factor of Fixed Tilt vs T0 Tracker Solar PV System 15
Operations Support - SunPower Operating Center > 750 MW monitored > 500 systems monitored > 120 power plants >1MW Providing guaranteed energy operating output for the College Systems Control Center 16
Example DeAnza College Weekly Performance 17
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Meeting Project s Objectives Savings: $13.2M in Savings and Rebates Delivered Design: Column Spacing and Clearance Beneath Supporting Structure to meet needs of Flea Market and Autocross. Schedule: Built almost Entirely During Summer Break, no disruptions to Flea Market Environmental Impact: 27.6M pounds of CO2 Reductions over 25 Years. Electric Cars: Will provide twenty (20) Electric Vehicle Charging Stations. 23
DeAnza College Environmental Impact 24
Integration with District s Environmental Education Program The Kirsch Center for Environment Studies 25
Technology Demonstrations for Classes Demonstrating the Key Distributed Generation Mounting Strategies Tracking Shade Structure Rooftop 26