Chris-Gehring-De-Anza-Case

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
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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
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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…”
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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.”
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DeAnza College Flea Market
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DeAnza College Autocross
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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
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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)
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SunPower High Efficiency Modules
- 435 Watts per module
- 20% Efficiency
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SunPower™ T0 Tracker
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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
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Tracking the Sun Enhances Peak Production
45.0%
Annual CF
Summer CF
40.0%
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
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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
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Example DeAnza College Weekly Performance
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Photos
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Photos
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Photos
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Photos
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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.
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DeAnza College Environmental Impact
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Integration with District’s Environmental Education Program
The Kirsch Center for Environment Studies
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Technology Demonstrations for Classes
 Demonstrating the Key Distributed Generation Mounting Strategies
Shade Structure
Tracking
Rooftop
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