Loma Linda 267 kW Solar Energy Project

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Loma Linda 267 kW Solar Energy Project

• Good for the city
• Good for the economy
• Good for the environment

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System Description

• 267 kW Solar system distributed over entire
  government campus
• Roof-top installation
• Independent monitoring for each sub-system

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Decision to Initiate

• Community Focus on Health
• Research and Leadership Background
• Civic involvement

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Societal Impacts

• Catalyst for energy conservation City wide
• Visible image of green community awareness
• Keeps the community in a leadership role in
  technology.
• Extends ag. extension model into other arenas

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US Electricity Production
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U.S. Retail Price of Electricity (Cents per kWh)
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Installation Experience

• Coordination with other projects
• New roof
• Parking / Shade Structures
• Landscape

• Set Customer Expectations
• Operational Considerations

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Site Considerations

• Maximum roof loads

• Seismic considerations

• Soil Conditions

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Project Timelines

• Break-down
• Engineering 16 weeks
• Component manufacture 52 weeks
• Physical Construction 40 weeks
• Construction Times
• Planned 26 weeks
• Actual 40 weeks

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Solar Cell Characteristics
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The Solar Cell

• Textured to keep the surface cooler
• Blue color for maximum absorption
• Reduced reflection to increase efficiency

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The Loma Linda System
1600 Panels
166 watt per Panel

• 267kW System

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System Generation

• Enough to power 70 homes

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Meets peak power needs

• Good fit with daily load peaks where summer air
  conditioning is required

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Power Grid

• Reduces the need for new transmission/distribution
  lines
• Increases the reliability of the grid
• Pass surplus back to the grid

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Reduction of comparable fossil fuel emissions is
like removing more than 3,300 cars from the road
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Reduces 38 million lbs of carbon dioxide
emissions annually that would have been produced
by coal or gas fired power plants
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To absorb 38 million lbs of carbon dioxide
emissions, we would need to plant 5000 acres of
trees
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Gas emissions from coal or gas fired power plants
can lead to smog, acid rain, haze and ultimately
increase the risk of climate change.
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Additional power generated will be fed back into
the existing power grid, at a profit.
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Credit for reducing electricity use

• SCE provides a flexible, program that offers
  credits for voluntarily reducing power.
• Reductions may occur any weekday between noon and
  800 p.m.
• There are no penalties for not reducing power

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Conservation
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Lighting

• Florescent Lights
• Same light with less energy
• Motion Sensors
• Turn off lights when not in use
• Photo Sensors
• Turn off lights when sunlight is available
• Timers
• Limit times that equipment operates

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Climate Control

• High efficiency AC units.
• Seal ducts
• Improve efficiency
• Weather Strip Openings
• Eliminate loss
• Thermostats
• Program use

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Passive Methods

• Window Film
• Reduce heat load
• Cool Roof
• Reflect heat
• Insulation
• Additional R value
• Trees
• Passive shade
• Irrigation Savings
• Limit cost of pumping water

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Conservation

• Maximizes the value, while minimizing the cost
  of Solar Energy

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Initial Costs

• System Cost 2,000,000
• Parking Structures 300,000
• Conservation Upgrades 30,000
• Gas Lines Installation 10,000
• Monitoring System 20,000
• Rebates -1,200,000
• Project Cost 1,160,000

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Annual Cost Recovery

• Energy Production 84,000
• Demand Bid 115,000
• Annual Incentives 30,000
• Annual Income 229,000

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Maint and ops

• Maintenance Contract 4,000
• Window Washing 5,000
• Inverter Maintenance 4,000
• Annual MO 11,000

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System ROI

• Annual Income 229,000
• Annual MO - 11,000
• Net Annual Revenue 218,000
• Project Cost 1,160,000
• Recovery Period 64 months