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Photovoltaic Energy Systems: Summary Research Review. Louise F. Goldberg Ph.D (Eng) Director, Building Physics and Foundations Research Programs, University of Minnesota January 10, 2008. College of Design Energy Systems Design Laboratory: Solar/Hydrogen/Fuel Cell Plant.

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photovoltaic energy systems summary research review

Photovoltaic Energy Systems:Summary Research Review

Louise F. Goldberg Ph.D (Eng)

Director, Building Physics and Foundations Research Programs, University of Minnesota

January 10, 2008

slide4

Electrolysis power source: PV only

  • Parasitic power source: grid only
  • Average solar power: 2.4kW
  • Average solar effectiveness: ~53% (average power / rated power during insolation periods)
  • Operating time: 73.9 hours
  • Amount of hydrogen generated: 13.6 lb (2413 scf)
  • Total electrical energy generated:  74.2kWh
  • Parasitic energy consumption (pumps, deionizer, electrolyser):  45.7kWh
  • Net energy generation:  28.5kWh
  • Net efficiency: 12.8%

Solar/Hydrogen/Fuel Cell Plant Performance Certification

slide5

Sanyo HIT Photovoltaic module temperature dependenceCell efficiency=18.7% Module efficiency=16.8%(manufacturer’s data)

slide6

Elec eff=9.1%

Therm. Eff=47.8%

Net eff.=56.9%

PVTWINS (Netherlands) Hybrid Thermal/PV Solar Collector(manufacturer’s data)

slide7

Hybrid Thermal/PV with air as the heat transfer fluidTiwari A, Sodha MS et al. Solar Energy Materials & Solar Cells, v 90, pp 175-189, 2006

slide8

CONCLUSION: Increase in overall efficiency of hybrid thermal/PV system of 18% (12% PV alone to 30% hybrid)Tiwari A, Sodha MS et al. Solar Energy Materials & Solar Cells, v 90, pp 175-189, 2006

slide9

Simulation configuration of hybrid PV/thermal collector with water as the heat transfer fluidChow TT. Solar Energy, v. 75, pp143-152, 2003

slide10

h=absorber plate/PV plate convective coefficient

c=bond conduction coefficient

Variation of thermal and electrical efficiencies with mass flow rateChow TT. Solar Energy, v. 75, pp143-152, 2003

slide11

C

A

Electricity distribution buss

HeatExchange

Intermediatethermal storage

Heat Pump

Water

Heater

Heat Pump

B

Available Waste Heat

4.2 G/M

Pump

Manifold

Pump

Insulated ThermalStorage

35 – 40 F

100 Gal

100 Gal

100 Gal

100 Gal

HESS Phase II

200’