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太阳能热光伏发电是太阳能利用的重要途径之一。碳纳米材料具有优异的物理化学特性,因此是极具吸引力的太阳能热光伏系统材料。本文提出一种基于碳纳米材料的全碳太阳能热光伏(CSTPV)系统,竖直排列多壁碳纳米管阵列作为吸收器;堆木头结构多壁碳纳米管薄膜作为发射器。堆木头结构使发射器在两种偏振条件下都具有与光伏电池能带间隙匹配的波长选择发射率。本文结合能量平衡模型和等效电路模型建立了可靠的CSTPV系统理论模型,并对CSTPV系统进行表征。当发射器吸收器面积比为3,太阳能聚光倍数为3000时,系统效率达到最大值16.2%,比相同条件下钨发射器太阳能热光伏系统最大效率(12.4%)提高了30.6%。
Solar thermal photovoltaic power generation is one of the important ways to use solar energy. Carbon nanomaterials have excellent physicochemical properties and are therefore attractive materials for solar thermal photovoltaic systems. In this paper, an all-carbon solar thermal photovoltaic (CSTPV) system based on carbon nanomaterials is proposed. A vertical array of multi-walled carbon nanotube arrays is used as an absorber. A multi-walled carbon nanotube film is used as a transmitter. The stack wood structure allows the emitter to have a wavelength-selective emissivity matched to the photovoltaic cell band gap under both polarization conditions. In this paper, a reliable theoretical model of CSTPV system is established based on energy balance model and equivalent circuit model, and the CSTPV system is characterized. When the emitter area ratio is 3 and the solar concentration multiple is 3000, the system efficiency reaches 16.2%, which is 30.6% higher than the maximum efficiency (12.4%) of the tungsten emitter solar thermal photovoltaic system under the same conditions.