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This parametric analysis of a thermophotovoltaic (TPV) converter considers emitter temperature, cell reflectance to radiation with energy below the cell's bandgap energy, and concentration ratio requirements. The concentration ratio is rigorously considered to determine its influence on converter performance. Important conclusions are that an emitter temperature near 2000 K is optimal; a cell reflectance value of 0.98 is required for below-bandgap irradiation; a secondary concentrator must be used with a parabolic-dish primary; and a mirror quality resulting in a 4-mrad reflected-beam dispersion is required for a 24 per cent conversion efficiency. |
