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Experimental study of a hybrid solar thermoelectric generator energy conversion system

机译:混合太阳能热电发电机能量转换系统的实验研究

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The development of renewable energy technologies to take advantage of clean energy sources, such as solar, is crucial for sustainability. Here, we show a hybrid solar thermoelectric (HSTE) concept that simultaneously recovers heat from the sun with a thermosyphon and generates electricity with a thermoelectric generator (TEG) via the Seebeck effect. In this work, we experimentally demonstrated a relatively low-temperature HSTE prototype that combines a cartridge heater (to emulate the sun), a TEG to generate electricity, and a thermosyphon. This thermosyphon consists of three zones: an evaporator, an adiabatic region, and a condenser. The TEG was located between the heater and the evaporator. The thermosyphon was used to maintain constant the lowtemperature face of the TEG and to recover heat in the condenser zone. A thermal resistance model was developed to understand the HSTE. Our model shows good agreement with the experimental data and guides the further development of the system. To evaluate the technical feasibility and performance of the HSTE, we characterized the HSTE by measuring the temperatures, condenser flow rate, voltage, and current under 72 different experimental conditions. We reported an electrical power of up to 96 mW and a recovered heat up to 68.18 W, when 118 W were supplied through the cartridge heater. Deionized water was the working fluid showing a higher electrical power generation than a 40% ethylene glycol solution.
机译:可再生能源的开发利用清洁能源,如太阳能,对可持续性至关重要。在这里,我们示出了一种混合太阳能热电(HSTE)概念,其同时将来自阳光的热量与热循环一起恢复,并通过塞贝克效应产生与热电发电机(TEG)的电力。在这项工作中,我们通过实验证明了一种相对低温的HSTE原型,该原型结合了盒式滤筒(以模拟太阳),TEG产生电力和热循环。该热源磷芯包括三个区域:蒸发器,绝热区域和冷凝器。 TEG位于加热器和蒸发器之间。使用热循环用于保持TEG的低温面并在冷凝器区中回收热量。开发了热阻模型以了解HSTE。我们的模型与实验数据显示了良好的一致性,并指导系统的进一步发展。为了评估HSTE的技术可行性和性能,我们通过测量温度,冷凝器流速,电压和72幅下方不同的实验条件下的电流来表征HSTE。当通过墨盒加热器供应118 W时,我们报告了高达96兆瓦的电力高达96兆瓦,回收热量高达68.18W。去离子水是工作流体,显示比40%乙二醇溶液更高的电力发电。

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