The University of California at Merced (UC Merced) unveiled its 1-megawatt solar system recently, in an effort to help the state meet its renewable energy goal (or renewable portfolio standard, RPS) of 33 percent of energy from renewable sources by 2020.
This goal was established by Gov. Arnold Schwarzenegger’s Executive Order S-14-08 late in 2008, and challenged by Alan J. Fohrer, chief executive of Southern California Edison, who said in an editorial that the goal is unrealistic based on the distance of the various, proposed utility-scale solar projects from transmission resources, and the cost ($115 billion) of creating such infrastructure. Fohrer was referring to Mojave Solar Park, among others.
UC Merced’s system, though only a small fraction of what is needed to meet California’s RPS, is nonetheless a step in the right direction, and will reportedly provide – through almost 5,000 solar panels – 66 percent of the campus’ electricity needs on sunny, summer days, or 20 percent overall of its annual energy needs.
This will save the university system $5 million in energy costs over the lifetime of the system (20 to 30 years), and will prevent about 1.5 million pounds of carbon dioxide emissions per year from fossil-fuel generation. This is about the same as removing 3,600 cars from California’s highways or planting 4,700 acres of tree canopy – assuming one could find 4,700 empty acres in California’s central valley.
The solar array also provides an ideal learning tool for engineering students, and the data collected will help staff and students working in the UC Merced Energy Research Institute to evaluate solar energy with an eye to where it might be improved.
The array was developed through a power purchase agreement with San Jose-based SunPower Corp., which manufactures high-efficiency solar cells, panels and systems. UC Merced, however, will retain the renewable energy credits, with financing through San Francisco-based Wells Fargo under a sale leaseback arrangement.
UC Merced’s solar array is located on 8.5 acres southeast of the Science & Engineering Building, and consists of panels mounted on SunPower’s proprietary, single-axis T20 Tracker® system, which accelerates solar irradiance capture by up to 30 percent over conventional, fixed-tilt systems.
SunPower already has more than 550 solar energy systems globally, either operational or under contract. This includes systems at California State-East Bay, Napa Valley College, Ohlone College, Mendocino College and the Los Angeles Community College District, all within the state.
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