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Solar radiation transfer and performance analysis of an optimum photovoltaic/thermal system

机译：最佳光伏/热力系统的太阳辐射传输和性能分析

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摘要

This paper presents the design optimization of a photovoltaic/thermal (PV/T) system using both non-concentrated and concentrated solar radiation. The system consists of a photovoltaic (PV) module using silicon solar cell and a thermal unit based on the direct absorption collector (DAC) concept. First, the working fluid of the thermal unit absorbs the solar infrared radiation. Then, the remaining visible light is transmitted and converted into electricity by the solar cell. This arrangement prevents excessive heating of the solar cell which would otherwise negatively affects its electrical efficiency. The optical properties of the working fluid were modeled based on the damped oscillator Lorentz-Drude model satisfying the Kramers-Kronig relations. The coefficients of the model were retrieved by inverse method based on genetic algorithm, in order to (i) maximize transmission of solar radiation between 200 nm and 800 nm and (ii) maximize absorption in the infrared part of the spectrum from 800 nm to 2000 nm. The results indicate that the optimum system can effectively and separately use the visible and infrared part of solar radiation. The thermal unit absorbs 89% of the infrared radiation for photothermal conversion and transmits 84% of visible light to the solar cell for photoelectric conversion. When reducing the mass flow rate, the outflow temperature of the working fluid reaches 74 ℃, the temperature of the PV module remains around 31 ℃ at a constant electrical efficiency about 9.6%. Furthermore, when the incident solar irradi-ance increases from 800 W/m2 to 8000 W/m2, the system generates 196 ℃ working fluid with constant thermal efficiency around 40%, and the exergetic efficiency increases from 12% to 22%.
机译：本文介绍了使用非集中式和集中式太阳辐射的光伏/热（PV / T）系统的设计优化。该系统由使用硅太阳能电池的光伏（PV）模块和基于直接吸收式集热器（DAC）概念的热单元组成。首先，热单元的工作流体吸收太阳红外辐射。然后，剩余的可见光被太阳能电池透射并转换成电能。这种布置防止了太阳能电池的过度加热，否则将对太阳能电池的电效率产生负面影响。基于满足Kramers-Kronig关系的阻尼振荡器Lorentz-Drude模型，对工作流体的光学特性进行了建模。通过基于遗传算法的逆方法检索模型的系数，以（i）最大化200 nm至800 nm之间的太阳辐射的透射，以及（ii）最大化800 nm至2000年光谱的红外部分的吸收纳米结果表明，该最优系统可以有效，分别地利用太阳辐射的可见光和红外光。热单元吸收89％的红外辐射以进行光热转换，并将84％的可见光传输到太阳能电池以进行光电转换。当降低质量流量时，工作流体的流出温度达到74℃，光伏组件的温度保持在31℃左右，恒定电效率为9.6％。此外，当入射太阳辐照度从800 W / m2增加到8000 W / m2时，系统会产生196℃的工作流体，其恒定热效率约为40％，能量效率从12％增加至22％。

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  • 来源
    《Energy Conversion & Management》 |2011年第2期|p.1343-1353|共11页
  • 作者

    Jiafei Zhao; Yongchen Song; Wei-Haur Lam; Weiguo Liu; Yu Liu; Yi Zhang; DaYong Wang;

  • 作者单位

    Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;

    Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;

    Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;

    Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;

    Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;

    Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;

    Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;

  • 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

    photovoltaic/thermal; direct absorption collector; inverse method; genetic algorithm; exergy efficiency;

    机译：光伏/热力;直接吸收收集器;反方法遗传算法火用效率;

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