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arXiv 2211.01262physics.app-ph
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高视角下热光伏转换效率的测量

Thermophotovoltaic conversion efficiency measurement at high view factors

Esther López, Irene Artacho, Alejandro Datas

摘要:

测量热光伏(TPV)效率的标准化方法尚未建立,这使得报告的结果难以比较。此外,迄今为止报道的大多数TPV效率都是使用小视角因子获得的,即,大的单元到发射器的距离,因此串联电阻的影响通常被低估,并且光腔效应,即,在发射器和电池之间发生的多次反射在实验上没有考虑。在这项工作中,我们提出了一个实验装置,能够测量TPV效率下的高视角因素(高达0.98),通过使用小发射极到电池的距离(< 1毫米)。这使得在更高的功率密度比以前的作品更准确的TPV效率的直接测量。结果表明,在1592 ℃石墨热发射体辐照下,背反射层为InGaAs的TPV电池的TPV效率为26.4 ± 0.1%,功率密度为4.3 ± 0.8W/cm ~ 2。

英文摘要:

A standardized method for measuring thermophotovoltaic (TPV) efficiency has not been yet established, which makes the reported results difficult to compare. Besides, most of the TPV efficiencies reported to date have been obtained using small view factors, i.e., large cell-to-emitter distances, so the impact of the series resistance is usually underestimated, and the optical cavity effects, i.e., the multiple reflections taking place between the emitter and the cell, are not accounted for experimentally. In this work, we present an experimental setup able to measure the TPV efficiency under high view factors (up to 0.98), by using small emitter-to-cell distances (< 1 mm). This allows a more accurate direct measurement of the TPV efficiency at higher power densities than previous works. As a result, a TPV efficiency of 26.4+-0.1 % and a power density of 4.3+-0.8 W/cm2 have been obtained for an InGaAs TPV cell with a back surface reflector irradiated by a graphite thermal emitter at 1592 C.

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