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Comparative Study on Energy and Exergy Properties of Solar Photovoltaic/Thermal Air Collector Based on Amorphous Silicon Cells
Applied Thermal Engineering ( IF 6.4 ) Pub Date : 2020-11-28 , DOI: 10.1016/j.applthermaleng.2020.116376
Mengxiao Huang , Yunfeng Wang , Ming Li , Vanhkeo Keovisar , Xuejuan Li , Decheng Kong , Qiongfen Yu

This paper compared the performance of solar photovoltaic/thermal (PV/T) air collectors (SPVTAC) based on amorphous silicon solar cells with traditional solar air collectors and individual photovoltaic (PV) modules. The SPVTAC was proposed to overcome the problems of large thermal stresses at fluctuating temperatures and frost in winter, and also due to their working suitability in medium-high temperature ranges. The energy and exergy performance of the three devices were tested and analyzed with different airflow rates, inlet temperatures and solar irradiance. The experimental results show that the thermal efficiency of SPVTAC was approximately 25% lower than the traditional solar air collector at the same operating condition. Also, the electrical efficiency of SPVTAC was higher than the individual PV system (4.65%) when the air mass flow rate was over 0.040 kg/s. For each degree increase in the inlet temperature, the thermal efficiency of the amorphous silicon SPVTAC decreased by approximately 0.45%, the electrical efficiency decreased by approximately 0.042% and the temperature difference between the inlet and outlet decreased by 0.24 °C. The maximum total exergy efficiency of the SPVTAC (12.22%) and the maximum thermal exergy efficiency of the traditional solar air collector (8.71%) was achieved at an inlet air temperature of 60 °C. These experimental results provide a reference for further applications of amorphous silicon solar cells integrated with SPVTAC.



中文翻译:

基于非晶硅电池的太阳能光伏/热空气集热器能量和火用特性的比较研究

本文将基于非晶硅太阳能电池的太阳能光伏/热能(PV / T)空气收集器(SPVTAC)与传统的太阳能空气收集器和单个光伏(PV)模块进行了比较。提出SPVTAC是为了克服冬季温度波动和霜冻时的大热应力问题,以及它们在中高温范围内的工作适用性。在不同的气流速率,入口温度和太阳辐照度下测试和分析了这三种设备的能量和火用性能。实验结果表明,在相同的工作条件下,SPVTAC的热效率比传统的太阳能集热器低约25%。同样,SPVTAC的电效率高于单个PV系统(4。当空气质量流量超过0.040 kg / s时)。对于进口温度每升高一度,非晶硅SPVTAC的热效率降低约0.45%,电效率降低约0.042%,进口和出口之间的温差降低0.24°C。在入口温度为60°C时,达到了SPVTAC的最大总火用效率(12.22%)和传统太阳能集热器的最大火用效率(8.71%)。这些实验结果为与SPVTAC集成的非晶硅太阳能电池的进一步应用提供了参考。电效率降低约0.042%,进口和出口之间的温差降低0.24°C。在入口温度为60°C时,达到了SPVTAC的最大总火用效率(12.22%)和传统太阳能集热器的最大火用效率(8.71%)。这些实验结果为与SPVTAC集成的非晶硅太阳能电池的进一步应用提供了参考。电效率降低约0.042%,进口和出口之间的温差降低0.24°C。在入口温度为60°C时,达到了SPVTAC的最大总火用效率(12.22%)和传统太阳能集热器的最大火用效率(8.71%)。这些实验结果为与SPVTAC集成的非晶硅太阳能电池的进一步应用提供了参考。

更新日期:2020-12-01
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