Thermionic Converter: Normal And Transparent Collectors

Fitzpatrick, G. O.; Allen, Daniel T.

doi:10.1109/iecec.1990.716583

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“…Previous works have explored the possibility of fabricating transparent collectors using very thin metallic layers on sapphire. 9 Other possibilities include using relatively simple elements, such as metallic grids, or some more sophisticated such as low work function transparent conducting oxides (TCO), or negative electron affinity (NEA) semiconductors, 10,11 such as cesiated GaN and AlN. 12 Two possible arrangements for the TIPV device are shown in Figure 1: three-terminal and two-terminal.…”

Section: Hybrid Thermionic-photovoltaic Convertermentioning

confidence: 99%

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Hybrid thermionic-photovoltaic converter

Datas

2016

Applied Physics Letters

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A conceptual device for the direct conversion of heat into electricity is presented. This concept hybridizes thermionic (TI) and thermophotovoltaic (TPV) energy conversion in a single thermionic-photovoltaic (TIPV) solid-state device. This device transforms into electricity both the electron and photon fluxes emitted by an incandescent surface. This letter presents an idealized analysis of this device in order to determine its theoretical potential. According to this analysis, the key advantage of this converter, with respect to either TPV or TI, is the higher power density in an extended temperature range. For low temperatures, TIPV performs like TPV due to the negligible electron flux. On the contrary, for high temperatures, TIPV performs like TI due to the great enhancement of the electron flux, which overshadows the photon flux contribution. At the intermediate temperatures, ∼1650 K in the case of this particular study, I show that the power density potential of TIPV converter is twice as great as that of TPV and TI. The greatest impact concerns applications in which the temperature varies in a relatively wide range, for which averaged power density enhancement above 500% is attainable.

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Section: Hybrid Thermionic-photovoltaic Convertermentioning

confidence: 99%

“…The emission of electrons and photons from a surface is governed by the Richardson-Dushmann and the Plank law equations, 8,9 respectively, J el ðu; TÞ ¼ AT 2 exp ðÀu=kTÞ;…”

Section: Hybrid Thermionic-photovoltaic Convertermentioning

confidence: 99%

Hybrid thermionic-photovoltaic converter

Datas

2016

Applied Physics Letters

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Thermionic Converter: Normal And Transparent Collectors

Cited by 1 publication

References 1 publication

Hybrid thermionic-photovoltaic converter

Hybrid thermionic-photovoltaic converter

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