low cost solar concentrator
Post on 14-Apr-2018
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A Low Cost Solar Concentrator
A simple solar concentrator for the developing world
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Rationale
2 billion people without electricity 40% CO2 from electrical power plants
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Economics of Solar Energy
$100/square Meter annually $12 dollars/square Meter average $500 capital cost to get the $12 2.5% ROI
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Economics of Solar Energy
Lots of energy available..Too expensive to utilize $50,000/acre at 12% conversion Average house needs 20 square meters. Cost was the rock on which, thus far all sun
power propositions were wrecked
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Advantages Of Concentration
Cheaper cost for large systems
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Disadvantages of Concentration
Requires clear days Very hot Requires tracking/extra complication
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5:1 PV Concentrator Example
Original $200/sq-meter
$100/sq-meter
$20/sq-meter
$10/sq-meter
0
250
500
750
1000
1250
1500
1750
2000
2250
2500
Cost for 5 sq-Meter system
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Higher Concentration
Thermal or PV Can have similar efficiencies/costs Thermal has added benefit of heat PV is simpler Lower temp thermal very compatible with
geothermal technology Higher temp requires greater
concentration/precision T**4 losses Medium concentration most proven HFC-245 very attractive working fluid
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Current Concentrator Technologies
Parabolic Trough Approx $200/sq-m quietly working for 20
years mature technology
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Current Concentrator Technologies
Linear Fresnel Approx $100/sq-m
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To Compete with Coal
Coal Fuel Costs appx 2 cents/kwh At 20% capital costs, 10% efficiency cost must be
$20/square meter (about the price of carpet)
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Stretched Membrane Concentrator
Low cost reflectormaterial ($1-10/sq-meter)
Support structure veryminimal
lightweight reflectorseasy to move
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Water-Float Tracking Mechanism
Ganged Reflectorscommon rate- different
phase
Easy to fix/diagnoseproblems
Possible to control1000's of panels with 1
pump
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Prototype
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Prototype
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Prototype
Reflector cost with tracking $7.50/sq-meter (realhome-depot prices)
Mass production can reduce this
Very hot! No one wants to stay on the ladder verylong
Need more testing/funding/pilot project
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Questions?
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