Experimental Investigation On Nanoparticles Suspended Liquid (NSL) As The Heat Transfer Fluid (HTF) For Solar Evacuated Tube Collector

Rupeshkumar V. Ramani, Anjana D. Saparia, Nirav P. Maniar, Jaysukh H. Markna
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Abstract

This study investigates the thermal performance of a solar evacuated tube collector (SETC) using nanoparticles suspended liquid (NSL) as the heat transfer fluid (HTF). The NSL is composed of water with different concentration of TiO2, CuO, Cr2O3, TiO2+CuO+ Cr2O3NSL withaverage size of ~25 nm. The experimental results show that the use of NSL increase the thermal performance of the SETC to be about 2% higher than that of the SETC without NSL. The enhancement in the thermal performance is mainly attributed to the higher thermal conductivity and specific heat capacity of the NSL. In addition, the effects of NSL concentration, flow rate and temperature on the thermal performance of the SETC with NSL were also studied. It was observed that the thermal performance of the SETC with NSL increases with increasing NSL concentration and flow rate but decreases with rise in the temperature. The results of this study can be used to optimize the design of solar evacuated tube collectors using NSL as the HTF for better thermal performance.
纳米颗粒悬浮液作为太阳能真空管集热器传热流体的实验研究
研究了以纳米颗粒悬浮液(NSL)作为传热流体的太阳能真空管集热器(SETC)的热性能。NSL由不同浓度的TiO2、CuO、Cr2O3和TiO2+CuO+ Cr2O3NSL组成,平均粒径约为~25 nm。实验结果表明,与未加NSL的SETC相比,使用NSL可使SETC的热工性能提高约2%。热性能的增强主要是由于NSL具有较高的导热系数和比热容。此外,还研究了NSL浓度、流量和温度对含NSL的SETC热工性能的影响。结果表明,含NSL的SETC的热性能随NSL浓度和流量的增加而增加,但随温度的升高而降低。研究结果可用于优化以NSL为HTF的太阳能真空管集热器的设计,以获得更好的热性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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