High-efficiency solar-thermophotovoltaic system equipped with a monolithic planar selective absorber/emitter
High-efficiency solar-thermophotovoltaic system equipped with a monolithic planar selective absorber/emitter
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DOI：
10.1117/1.jpe.5.053099
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发表时间：
2015
影响因子：
1.7
通讯作者：
M. Shimizu;A. Kohiyama;H. Yugami
中科院分区：
文献类型：
--
作者：
M. Shimizu;A. Kohiyama;H. Yugami
抽象的。我们展示了一种使用单片、平面和光谱选择性吸收/发射器的高效太阳能-热光伏系统(STPV)。为了进行发电试验，设计并制造了一套完整的利用GaSb电池的STPV系统。为了生产高效率的STPV，将热辐射光谱与GaSb电池的敏感区域匹配是很重要的。因此，为了在较低的入射功率下达到较高的温度，采用了平面吸收/发射体来控制热辐射光谱。这种多层涂层是由夹有氧化钇稳定的氧化锆层的薄膜钨组成的。考虑到所制造的吸收/发射体的光学性质，系统效率估计为16%。利用高浓度太阳模拟器进行的发电测试表明，吸收/发射极温度在1640K处达到峰值，入射功率密度为45W/cm2，这是通过菲涅尔透镜等低成本光学元件很容易获得的。转换效率达到23%，超过了GaSb的Shockley-Queisser极限，禁带宽度为0.67 eV。此外，在发射体和电池之间的视场系数假定为1的情况下，系统的总效率为8%。
Abstract. We demonstrate a high-efficiency solar-thermophotovoltaic system (STPV) using a monolithic, planar, and spectrally selective absorber/emitter. A complete STPV system using gallium antimonide (GaSb) cells was designed and fabricated to conduct power generation tests. To produce a high-efficiency STPV, it is important to match the thermal radiation spectrum with the sensitive region of the GaSb cells. Therefore, to reach high temperatures with low incident power, a planar absorber/emitter is incorporated for controlling the thermal radiation spectrum. This multilayer coating consists of thin-film tungsten sandwiched by yttria-stabilized zirconia. The system efficiency is estimated to be 16% when accounting for the optical properties of the fabricated absorber/emitter. Power generation tests using a high-concentration solar simulator show that the absorber/emitter temperature peaks at 1640 K with an incident power density of 45 W/cm2, which can be easily obtained by low-cost optics such as Fresnel lenses. The conversion efficiency became 23%, exceeding the Shockley–Queisser limit for GaSb, with a bandgap of 0.67 eV. Furthermore, a total system efficiency of 8% was obtained with the view factor between the emitter and the cell assumed to be 1.