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首页> 外文期刊>International Journal of Heat and Mass Transfer >A high-efficiency hybrid high-concentration photovoltaic system
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A high-efficiency hybrid high-concentration photovoltaic system

机译：高效混合高浓度光伏系统

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摘要

Photovoltaic power generation is a growing renewable primary energy source, expected to assume a major role as we strive toward fossil fuel free energy production. However, the photovoltaic efficiencies limit the conversion of solar radiation into useful power output. Hybrid systems extend the functionality of concentrating photovoltaics (CPV) from simply generating electricity, to providing simultaneously electricity and heat. The utilization of otherwise wasted heat significantly enhances the overall system efficiency and boosts the economic value of the generated power output. The current system consists of a scalable hybrid photovoltaic-thermal receiver package, cooled with an integrated high performance microchannel heat sink. The package can be operated at elevated temperatures due to its overall low thermal resistance between solar cell and coolant. The effect of the harvested elevated coolant temperature on the photovoltaic efficiency is investigated. The higher-level available heat can be suitable for sophisticated thermal applications such as space heating, desalination or cooling (polygeneration approaches). A total hybrid conversion efficiency of solar radiation into useful power of 60% has been realized. The exergy content of the overall output power was increased by 50% through the exergy content of the extracted heat. An analysis based on the economic value of heat illustrates that the reused heat can double the economic value of such a system.
机译：光伏发电是一种正在增长的可再生主要能源，在我们努力实现无化石燃料能源生产的过程中，光伏发电有望发挥重要作用。然而，光伏效率限制了太阳辐射到有用功率输出的转换。混合动力系统将聚光光伏（CPV）的功能从简单的发电扩展到同时提供电和热。否则浪费的热量的利用显着提高了整个系统的效率，并提高了所产生功率输出的经济价值。当前系统由可扩展的混合式光伏热接收器组件组成，并通过集成的高性能微通道散热器进行冷却。由于其在太阳能电池和冷却剂之间的总体低热阻，因此该组件可在高温下运行。研究了收获的冷却液温度升高对光伏效率的影响。较高级别的可用热量可能适用于复杂的热应用，例如空间加热，淡化或冷却（多联产方法）。已经实现了将太阳辐射转换为有用功率的总混合转换效率为60％。通过提取的热量的总能值将总输出功率的总能值提高了50％。基于热量经济价值的分析表明，再利用的热量可使这种系统的经济价值翻倍。

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  • 作者

    Severin Zimmermann; Henning Helmers; Manish K. Tiwari; Stephan Paredes; Bruno Michel; Maike Wiesenfarth; Andreas W. Bett; Dimos Poulikakos;

  • 作者单位

    Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland,Advanced Thermal Packaging, IBM Research - Zurich, 8803 Rueschlikon, Switzerland;

    Fraunhofer Institute for Solar Energy Systems ISE, 79110 Freiburg, Germany;

    Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland;

    Advanced Thermal Packaging, IBM Research - Zurich, 8803 Rueschlikon, Switzerland;

    Advanced Thermal Packaging, IBM Research - Zurich, 8803 Rueschlikon, Switzerland;

    Fraunhofer Institute for Solar Energy Systems ISE, 79110 Freiburg, Germany;

    Fraunhofer Institute for Solar Energy Systems ISE, 79110 Freiburg, Germany;

    Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland;

  • 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

    Photovoltaics; Energy efficiency; Exergy; HCPV; Thermal energy;

    机译：光伏;能源效率;火用;HCPV;热能;

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