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首页> 外文期刊>Energy Conversion & Management >Experimental study of carbon nano tube/oil nanofluid in dish concentrator using a cylindrical cavity receiver: Outdoor tests
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Experimental study of carbon nano tube/oil nanofluid in dish concentrator using a cylindrical cavity receiver: Outdoor tests

机译：使用圆柱形空腔接收器的碟式浓缩器中碳纳米管/油纳米流体的实验研究：室外测试

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摘要

The application of nanofluids is accounted as an effective way for improving the thermal performance of solar systems. In the current study, MWCNT/thermal oil nanofluid was experimentally tested as a solar heat transfer fluid. A dish collector, using a wounded cylindrical cavity receiver, was considered as the solar system. The main aim of this work was the experimental investigation of the cylindrical cavity's performance, using MWCNT/thermal oil nanofluid. Two experimental models were suggested for the prediction of the cavity's thermal efficiency, by considering MWCNT/thermal oil nanofluid and pure thermal oil in the steady-state period. It was indicated that the heat loss coefficient of the cylindrical cavity receiver decreased by the application of nano fluid. The results revealed the average thermal efficiencies of 63.9% and 56.44% for MWCNT/thermal oil nanofluid and pure thermal oil, respectively. The thermal efficiency was changed form 60.04% to 64.76%, by using the nanofluid, in the steady-state period. Also, it was observed that the thermal performance of the cavity receiver was improved by 13.12%, by using MWCNT/thermal oil nanofluid. Based on the obtained results, the application of MWCNT/oil nanofluid is recommended in the solar dish concentrators with cavity receiver.
机译：纳米流体的应用被认为是改善太阳能系统的热性能的有效途径。在当前的研究中，MWCNT /导热油纳米流体已作为太阳能传热流体进行了实验测试。使用受伤的圆柱形空腔接收器的碟子收集器被视为太阳系。这项工作的主要目的是使用MWCNT /导热油纳米流体对圆柱腔的性能进行实验研究。通过考虑稳态期的MWCNT /导热油纳米流体和纯导热油，提出了两个用于预测腔体热效率的实验模型。结果表明，纳米流体的应用降低了圆柱腔接收器的热损失系数。结果表明，MWCNT /导热油纳米流体和纯导热油的平均热效率分别为63.9％和56.44％。在稳态期间，通过使用纳米流体，热效率从60.04％更改为64.76％。而且，观察到通过使用MWCNT /导热油纳米流体，空腔接收器的热性能提高了13.12％。根据获得的结果，建议将MWCNT /油纳米流体应用在带有腔体接收器的太阳能碟形浓缩器中。

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