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Converters of the Thermal Component of Concentrated Solar Radiation Based on Granular Silicon
Applied Solar Energy Pub Date : 2020-10-20 , DOI: 10.3103/s0003701x20040039
B. M. Abdurakhmanov , M. M. Adilov , Kh. B. Ashurov , M. Sh. Kurbanov

Abstract

This study provides the results of researching electrophysical properties of granular silicon powder without any agglomeration of a powder placed in a dielectric, formative housing with metal contacts. The particles of silicon powder of the working body, made on this basis as a thermal energy converter, are mechanically pressed against each other with a certain force. The heating of this body results in abnormally high open-circuit voltage (Uoc) and short-circuit current (Isc). The Seebeck coefficient of this material at temperatures from 300 to 350 K is 10 times greater than that of single-crystal silicon and equal to ~500 μV/K and the thermal conductivity is ~16 W/(m K), which is, respectively, 9 times lower than that of single-crystal silicon. Short-circuit current Isc depends on the magnitude of the external pressure and the temperature gradient along the length of the specimen’s working body. Granular silicon thermal energy converters can be used in several extreme conditions, including exposure to high radiation levels, unlike single- or polycrystal silicon semiconductor devices. Various designs and characteristics of heat and pressure converters are presented, which use medium-intensity concentrated solar radiation as a source of thermal energy.



中文翻译:

基于粒状硅的聚光太阳辐射热成分转化器

摘要

这项研究提供了研究粒状硅粉的电物理性质的结果,而这种粉状硅粉没有放置在带有金属触点的电介质形成性外壳中,而不会发生任何结块。在此基础上制成的作为热能转换器的工作体的硅粉颗粒以一定的力彼此机械挤压。该物体的发热导致异常高的开路电压(U oc)和短路电流(I sc)。该材料在300至350 K的温度下的塞贝克系数是单晶硅的塞贝克系数的10倍,等于〜500μV/ K,热导率分别为〜16 W /(m K),分别是,比单晶硅低9倍。短路电流I sc取决于外部压力的大小和沿试样工作体长度的温度梯度。与单晶或多晶硅半导体器件不同,粒状硅热能转换器可以在多种极端条件下使用,包括暴露于高辐射水平。介绍了热和压力转换器的各种设计和特性,它们使用中等强度的集中太阳辐射作为热能来源。

更新日期:2020-10-20
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