基于相变材料的双通道PV/T系统性能研究

PERFORMANCE OF A DUAL-CHANNEL PV/T INTEGRATED SYSTEM BASED ON PHASE CHANGE MATERIALS

研究了以水为工质的双通道PV/T系统性能。实验测量水的光学特性,并搭建室内实验台,在实验室条件下对双通道PV/T系统性能进行实验研究。对比研究不同流速和有、无相变材料对系统性能的影响,包括对太阳电池工作温度和系统电、热效率的影响。研究结果表明,双通道PV/T系统可有效降低太阳电池的工作温度;工质流量从100 mL/min增加至300 mL/min,双通道PV/T系统太阳电池平均温度降低1.77℃,电、热效率分别增加0.09%和4.11%;相比于电性能,流量的变化对系统的热性能影响更大;采用相变材料的双通道PV/T系统,进一步降低太阳电池的工作温度,提升系统的电热效率,系统可达到更高综合利用效率。

Abstact:This paper studies the performance of a dual-channel PV/T system with water as working fluid. The optical properties of waterwere characterized,and we built a laboratory experiment setup to conduct experimental research on the performance of the dual-channelPV/T system under laboratory conditions. Effects of different flow rates and with or without a phase change material layer on theperformance of the system were investigated,including the impact on the working temperature of sdar cells and the electric and thermalefficiencies of the system. The experiment results show that the dual-channel PV/T system can effectively reduce working temperature ofsdar cells. When the flow rate of working fluid increases from 100 m L/min to 300 m L/min,the average temperature of sdar cells of thedual-channel PV/T system decreases by 1.77 ℃,and the electric and thermal efficiencies increase by 0.09% and 4.11%,respectively.Compared with the electric performance,changes in flow rate have a greater impact on the thermal performance of the system. The dualchannel PV/T system with phase change materials further reduces the operating temperature of the solar sdar cells. The electric andthermal efficiencies of the system are improved,and the system can reach a higher overall conversion efficiency.