Investigation of the entropy generation and efficiency of a solar thermophotovoltaic system

Investigation of the entropy generation and efficiency of a solar thermophotovoltaic system
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太阳能热光伏系统的熵产生和效率研究

DOI:
10.1007/s11434-010-3115-6
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发表时间:
2010-12
影响因子:
--
通讯作者:
Yuge Han
Yuge Han
中科院分区:
--
文献类型:
--
作者:
Xue Chen;Yimin Xuan;Yuge Han

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基于热力学第二定律,建立了太阳能热光伏(STPV)系统效率分析与优化的理论模型。对整个系统装配过程中所涉及的组件模块的光电转换过程中的熵产进行了数值计算和分析。研究了发射极温度、浓度比、能带隙、电池温度和滤波器的透射率对熵和效率的影响。同时,对各模块的转换效率进行了讨论。结果表明:随着发射极温度的升高,系统的熵产先减小后增大。当浓度比增大时,系统的熵产减小。电池的带隙值和化学势的增加也会导致熵产的减少。随着电池温度的升高,熵产增加,STPV系统的转换效率降低。
Based on the second law of thermodynamics, a theoretical model is established for efficiency analysis and optimization of a solar thermophotovoltaic (STPV) system. The entropy generation in the photo-electricity conversion process is numerically calculated and analyzed for the component modules involved in the whole system assembly. The effects of the emitter temperature, concentration ratio, energy bandgap, cell temperature and the transmissivity of the filter on the entropy and the efficiency are investigated. Meanwhile, the conversion efficiencies of the modules are discussed. The following results are obtained: at first the entropy generation of the system reduces but then increases with the rise of the emitter temperature. When the concentration ratio improves, the entropy generation of the system falls. The increase of the bandgap value and chemical potential of the cell also causes the reduction of the entropy generation. Along with the increase of the cell temperature, the entropy generation increases and the conversion efficiency of the STPV system decreases.
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