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Transcript of Thermophotovoltaic
Conclusion Index Fundamental Principles Filter PV Cell Thermal Source Emitter / Radiator TPV System Electric Power EW2_UT/RE B3_Hinterholzer, Stritter PV Cell - semiconductor with particular energy bandgap Applications High efficient Solar PV-Cells Off-Grid Energy Supply Replacement of Batteries 1 2 3 Limit Commercial Impementation Conclusion Chandler, D. L. (2012, 12 29). http://mitei.mit.edu/news/turning-heat-power. Retrieved from MIT Energy Initiative: http://mitei.mit.edu/news/turning-heat-power
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Wojtczuk, S. (2012). Inverted Three-Junction Tandem Thermophotovoltaic Modules, Ocotober 2012. NASA Tech Briefs , 1,2.
Zenker, M. (2001, März). Thermophotovoltaische Konversion von Verbrennungswärme. Tübingen. efficiency limit Carnot efficiency Filter Spectral Control - concentrating solar radiation onto an emitter
to get a selective emittance
- can be converted with a particular PV Cell
- theoretical efficiency up to 80 % - natural caused blackouts
- electricity and heat supply for off-grid regions
- camping and recreational vehicles - button sized TPV generator
- 3 x energy storable at the
the same size Thank You EW2_UT/RE B3_Hinterholzer, Stritter - plane surface without selectivity
+ bandpass filter - approved SI-cells possible Eg,Si = 1.1 eV ; λ = 1.1 μm < 1500 K small percentage of radiated photons with suitable energy - materials with lower bandgap energies Eg = 0.72 eV ; λ = 1.7 μm GaSb ( gallium antimonide) Filter PV Cell Emitter / Radiator Filter - selective emitter - front or back surface reflector on PV array - upper limit for heat conversion systems overall efficiency made up of
TPV cell performance
spectral control characteristics
geometric arrangements circa 80 % Selective Emitter - arranged by material - arranged by physical structuring processed surface - useable at any time
- usage of wasted heat
- switchable electricity source key function for a change-over to renewable energies References Thermophotovoltaic (TPV) for your attention Tcell ~ 300K
Temiter ~ 1500K wavelength λ [nm] relative emissitivity in %