石墨烯纳米流体在PV/T系统中的分频性能分析

The performance analysis of spectral splitting of graphene nanofluids in PV/T system

文章对质量浓度分别为0.02‰,0.05‰,0.1‰的水基石墨烯纳米流体的分频特性进行了研究。采用双光程法测试了光谱透过率,可理论分析石墨烯纳米流体的分频性能。在90 min模拟光照的条件下,分析不同浓度石墨烯纳米流体和水作为分频液时分频型PV/T系统集热效率、电效率和综合效率的变化情况。结果表明:0.02‰石墨烯纳米流体的光谱透过率最高,在400~900 nm的单晶硅电池较佳响应波段,其透过率为66.8%;将取热温度设定为40℃,0.1‰纳米流体达到40℃时,热效率最高达39.7%;水作为PV/T系统分频液时,PV电池输出效率最高为10.9%;同时,利用性能评价函数MF(The Merit Function)来评估分频液对PV/T系统综合性能的影响,当达到取热温度40℃时,0.1‰石墨烯分频液瞬时MF值最高达1.85。

This paper had researched the spectral splitting characteristics of water-based graphene nanofluids with mass concentrations of 0.02%,0.05%and 0.1%.The spectral transmittance measured by two path-length method could be used to theoretically analyze the spectral splitting performance of graphene nanofluids.Under the condition of simulated light for 90 min,the thermal collection efficiency,electrical efficiency and comprehensive efficiency of PV/T system with different concentrations of graphene nanofluids and water as spectral splitting liquid had been analyzed.The results show that the 0.02%graphene nanofluid has the highest spectral transmittance,and the transmittance is 66.8%in the 400~900 nm monocrystalline silicon cell with better response band.When the heat extraction temperature was set at 40℃,the thermal efficiency of 0.1%nanofluid was highest when the liquid temperature reached 40℃,which is 39.7%.When water is used as the spectral splitting liquid of PV/T system,PV cell output efficiency is the highest,which is 10.9%.At The same time,The performance evaluation Function MF(The Merit Function)was used to evaluate The influence of frequency division solution on PV/T system performance.When The heat extraction temperature reached 40℃,The instantaneous MF value of 0.1%graphene frequency division solution was The highest,reaching 1.85.