05 Experiment - TPV - Experiment 05 Combustion Driven...

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Experiment # 05 Combustion Driven Thermophotovoltaic Power System Professor Yueh-Heng Li 1. Introduction Thermophotovoltaic (TPV) is a direct heat to electricity conversion method that was first suggested in the 1950s. The TPV conversion concept is straightforward. Thermal or infrared radiation is converted by a photovoltaic (PV) cell into electricity, just in the same way as solar radiation is converted by a PV cell into electricity. A typical TPV system consists of a high-temperature radiator (1,000 - 1,700 o C), a cavity that includes a filter to control the infrared spectrum and PV cells to convert thermal radiation into electricity. In contrast to solar PV, TPV has two decisive advantages. First, TPV conversion is applicable to any high temperature heat source - 1 -
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including the solar, combustion, nuclear and waste heat sources. Second, the efficiency can be enhanced by the control of the absorbed spectrum in the PV cell compared to solar PV. A conceptual schematic of a TPV system is shown in Figure 1. It shows the main system components and heat flow paths in a portable TPV generator. Green arrows signify useful power input and output, orange arrows signify optical heat flow, and the red arrows detail the various undesirable heat losses. The efficiency of a TPV system
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