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首页> 外文期刊>Journal of Heat Transfer >Theoretical Analysis and Testing of Nanofluids-Based Solar Photovoltaic/Thermal Hybrid Collector
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Theoretical Analysis and Testing of Nanofluids-Based Solar Photovoltaic/Thermal Hybrid Collector

机译:基于纳米流体的太阳能光伏/热电混合集热器的理论分析和测试

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摘要

Solar energy can be harvested via thermal, photovoltaic, and photovoltaic/thermal (PV/T) hybrid technologies. PV/T systems are advantageous because they utilize more of the solar spectrum and achieve a higher combined efficiency. One approach to PV/T design is to keep the operating temperature of the PV low while achieving a high temperature for the thermal absorber. Various designs of PV/T hybrids (both flat plate and concentrated) have already been proposed which utilize air or water to remove the heat from PV cells in order to enhance the overall efficiency of PV/T hybrid collector. We propose that a nanofluid can be used instead, doubling as both the heat transfer medium and an optical filter, which allows for thermal isolation of the PV and thermal receiver. Thus, unwanted IR and UV light is filtered before it hits the PV cells, which allows for higher overall efficiencies. In this study, a new design of a PV/T hybrid collector was proposed and two nanofluid filters (based on gold and silver nanoparticles) were tested with a silicon (Si) PV cell. The corresponding stagnation temperatures of PV/T hybrid collector were measured and compared with a theoretical model. The experimental measurements validate the theoretical model, giving similar results over the range of parameters tested. The silver nanofluid design achieved the highest thermal, PV and overall efficiency and both nanofluid configurations out-performed an analogous surface absorber PV/T design under similar conditions. Overall, this study shows that nanofluids represent a feasible and viable multifunctional (optical filter and heat transfer) media in PV/T solar systems.
机译:可以通过热能,光伏技术以及光伏/热能(PV / T)混合技术来收集太阳能。 PV / T系统之所以具有优势,是因为它们利用了更多的太阳光谱并获得了更高的综合效率。 PV / T设计的一种方法是保持PV的工作温度低,同时使吸热器达到高温。已经提出了各种设计的PV / T混合器(平板式和集中式),它们利用空气或水从PV电池中去除热量,以提高PV / T混合器的整体效率。我们建议可以使用纳米流体来代替,同时兼作传热介质和滤光片,从而实现PV和热接收器的热隔离。因此,不需要的IR和UV光在撞击PV电池之前就被过滤掉了,从而提高了整体效率。在这项研究中,提出了一种新的PV / T混合捕集器设计,并使用硅(Si)PV电池测试了两个纳米流体过滤器(基于金和银纳米颗粒)。测量了PV / T混合集热器的相应停滞温度,并将其与理论模型进行了比较。实验测量结果验证了理论模型,并在测试的参数范围内提供了相似的结果。银纳米流体设计实现了最高的热效率,PV和整体效率,并且在相似条件下,两种纳米流体配置均优于类似的表面吸收器PV / T设计。总体而言,这项研究表明,纳米流体代表了PV / T太阳系中一种可行且可行的多功能(光学过滤器和热传递)介质。

著录项

  • 来源
    《Journal of Heat Transfer》 |2015年第9期|091015.1-091015.8|共8页
  • 作者单位

    School of Mechanical, Materials and Energy Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India;

    School of Mechanical, Materials and Energy Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India;

    School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney 2052, Australia;

    School of Mechanical, Materials and Energy Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India;

    School of Mechanical, Materials and Energy Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India;

    School of Mechanical, Materials and Energy Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India;

    School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney NSW 2052, Australia;

    Department of Mechanical Engineering, University of Tulsa, Tulsa, OK 74104-3189;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    solar energy; photovoltaic; heat transfer; thermal; hybrid; nanofluid; optical filter;

    机译:太阳能;光伏传播热量;热杂种纳米流体光学滤镜;

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