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首页> 外文期刊>Energy Conversion & Management >Thermal, hydraulic and exergetic evaluation of a parabolic trough collector operating with thermal oil and molten salt based nanofluids
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Thermal, hydraulic and exergetic evaluation of a parabolic trough collector operating with thermal oil and molten salt based nanofluids

机译：对抛物槽式集热器进行热，水力和能量的评估，该集热器使用导热油和熔融盐基纳米流体

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摘要

The use of nanofluids in parabolic trough collectors is a promising technique for enhancing their performance. This study investigates the dispersion of CuO nanoparticles in Syltherm 800 (thermal oil) and in nitrate molten salt (60% NaNO3 - 40% KNO3). The objective of this work is to examine the thermal efficiency enhancement margin of the utilization of nanofluids for two usual working fluids (thermal oil and molten salt) as base fluids. Moreover, this work includes hydraulic analysis about the pressure losses and exergetic analysis in order to evaluate the total performance of the collector. The module of LS-2 parabolic trough collector is examined with a computational fluid dynamics program developed in SolidWorks Flow Simulation. The model accuracy is checked with thermal efficiency and flow criteria using literature results. The simulations are conducted for temperatures up to 650 K for oil cases and up to 850 K for molten salt cases. According to the final results, the use of oil-based nanofluids leads to thermal efficiency enhancement up to 0.76%, while the use of molten salt-based nanofluid up to 0.26% thermal efficiency enhancement. The Nusselt number enhancement is found up to 40% for Syltherm 800-CuO and up to 13% for molten salt-CuO.
机译：在抛物槽收集器中使用纳米流体是增强其性能的有前途的技术。这项研究研究了CuO纳米粒子在Syltherm 800（导热油）和硝酸盐熔融盐（60％NaNO3-40％KNO3）中的分散性。这项工作的目的是研究将两种常见工作流体（导热油和熔融盐）用作基础流体时使用纳米流体的热效率提高幅度。此外，这项工作包括有关压力损失的水力分析和能量分析，以评估收集器的总体性能。使用在SolidWorks Flow Simulation中开发的计算流体动力学程序检查LS-2抛物槽收集器的模块。使用文献结果，通过热效率和流量标准检查模型的准确性。对于油箱，最高温度为650 K，熔盐箱，最高温度为850 K，进行了仿真。根据最终结果，使用油基纳米流体可提高热效率至0.76％，而使用熔融盐基纳米流体可提高热效率0.26％。发现Syltherm 800-CuO的Nusselt数量提高了40％，熔融盐-CuO的Nusselt数量提高了13％。

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