SOLAR ENERGY

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SOLAR ENERGY

• Max D. Lechtman
• Paul W. Spinner
• October 28,2005

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1/17,000 of the Suns Output!According to John
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To paraphrase Dennis

• Economics be damned, we have to reduce our usage
  of fossil fuels.

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Max will discuss

• Concentrating Solar Power Technologies
• Passive Solar Considerations
• Solar Tidbits

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CSP Technologies

• enough electric power for the entire country
  could be generated by covering about 9 of
  Nevadaa plot of land 100 miles on a side
• with parabolic trough systems.
• www.energylan.sandia.gov/sunlab/overview.htm

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DOEs CSP Technologies

• Troughs
• Dish/Engines
• Power Towers

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Troughs

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Troughs

• Suitable For Large Systems
• Grid-connected Power
• 30-200 MW size
• Proven Technology
• Available Today

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Dish/Engines
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Dish/Engines

• Modular
• Remote Applications
• Demonstration Installations
• High Efficiency
• Conventional Construction
• Commercial Engines Under Development

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Sterling Engine
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Stirling Engine
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Power Towers
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Power Towers

• Suitable For Large Systems
• Grid-connected Power
• 30-200 MW size
• Potentially Lower Cost
• Potentially Efficient Thermal Storage
• Need To Prove Molten Salt Technology

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Cost Of Energy

• Trough Dish/Engine Tower
• 2000 11.8 17.9 13.6
• 2010 7.6 6.1 5.2
• 2020 7.2 5.5 4.2
• 2030 6.8 5.2 4.2
• Cents/kWh in 1997

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Selected Passive Systems

• House Design Features
• Overhang
• Trombe Wall
• Roof Vents
• Solar Hot Water
• Rock Bin
• Earth Cooling

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Solar Collection/Rejection
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Solar House Features
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Design for Solar
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Design for Earth Cooling
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Solar Tidbits

• Military
• Tent and Uniform Fabrics
• Pocket Battery Chargers
• Civilian
• Backpacks
• Radio Headsets
• Wi-Fi in the Sky
• Time Magazine, October 31, 2005

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Paul will discuss

• Alternate Energy Sources
• Applications
• Limitations
• Drivers
• Indicators

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Alternate Energy Sources- Historical

• Nuclear
• Hydroelectric
• Geothermal
• Rooftop Water

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Alternate Energy Sources - Evolving

• Biomass (Ethanol, digesters)
• Wind
• Solar Reflector Arrays (Driven, Stationary)
• Photo-Voltaic (Panels)

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Applications - Solar Power

• Remote power
• (Space, Wirefree)  
• Architectural
• SmallCommon Electronics                           
    

• Emergency
•  Military
• Grid supplements

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Limitations

• High Cost    
•        
•  Climate   
• Thin - Off Daily        
•                              
•                            

• Require Storage
• Duplication
• Big Footprint

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Who/What Drives Expansion Now?

• Competitive Costs
• Legislation (Subsidies)
• Utilities (Rebates)
• Emergencies

• Environmentalists
• Scientists (Union of Concerned)
• Oil Companies (BP/Exxon)
• Politicians (Some)

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Potential Drivers

• Carbon Discharge Tax
• Research Money (Public/Private)
• Gas Guzzler Tax
• Auto-maker Mileage Standards (SUVs)
• Storms

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Current Affairs - Indicators?

• California Governors One MillionRooftop Solar
  Homes
• DWPs Rebates (!50-300 Million)
• Negative Federal Thrust - More/Cheaper Fossil
  Fuel
• Doesnt Help Solar Energy -Aggravates Climate
  Warming

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(No Transcript)
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Reading List

• General Information
• www.ases.org
• www.eere.energy.gov/RE/solar.html
• www.eere.energy.gov/solar/
• www.homepower.com/
• www.solarelectricpower.org/power/
• www.solarenergy.net/
• www.txses.org/epsea/

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Reading List

• For the Engineers
• http//scitation.aip.org/dbt.jsp?KEYJSEED
• Journal of Solar Engineering 2000-2005
• For the third world
• www.self.org/