Performance Assessment and Improvement of Photovoltaic-Thermal System based on Energy, Exergy, Economic and Environment Analysis  

作　　者：ZHOU Yuan WANG Jiangjiang QIN Yanbo LIU Boxiang 

机构地区：[1]Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Chin

出　　处：《Journal of Thermal Science》2024年第6期2166-2178,共13页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52276007);the Fundamental Research Funds for the Central Universities(Grant No.2023JC010).

摘　　要：A photovoltaic thermal(PV/T)system with parallel cooling channels was designed in this work to decrease the PV panel temperature and improve its photoelectric conversion efficiency.A 4E analysis method(includes energy,exergy,economic,and environmental aspects)was formulated to comprehensively evaluate the performances of the PV/T system,combining experimental and simulation studies.Firstly,the experiment was performed using water as the cooling medium.Results show that the PV/T system can reduce daily CO_(2) emissions by 1682.47-1705.98 g,and compared to the PV system,the added cooling module can increase electrical efficiency and environmental performance by 12.19%and 6.2%,respectively.When the mass flow of water rose from 0.017 kg/s to 0.023 kg/s,the electrical,thermal,and overall efficiencies were improved by 3.82%,11.36%,and 8.27%,respectively.Secondly,a numerical simulation model was constructed based on the experimental results to predict operations of the presented PV/T system using nanofluids as the cooling medium,including Ag,Al_(2)O_(3),and SiO_(2).Simulation results show that the Al_(2)O_(3)-nanofluid-based PV/T system has a higher application value,enabling an electrical efficiency of up to 15.13%.Its thermal efficiency can be enhanced by 5.43%when the volume fraction of Al_(2)O_(3);increases from 1%to 5%.

关 键 词：photovoltaic/thermal system parallel cooling channels 4E analysis method NANOFLUID numer analysis 

分 类 号：TM914.4[电气工程—电力电子与电力传动]