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Title: Performance Assessment and Improvement of Photovoltaic-Thermal System based on Energy, Exergy, Economic and Environment Analysis
题目：基于能源-㶲-经济-环境分析的PVT系统性能评估与改进
Authors: ZHOU Yuan, WANG Jiangjiang, QIN Yanbo, LIU Boxiang
作者：周源，王江江，秦研博，刘博想
单位：华北电力大学动力工程系
Journal of Thermal Science, 2024, 33(6): 2166-2178.
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摘要
Abstract: 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 CO2 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, Al2O3, and SiO2. Simulation results show that the Al2O3-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 Al2O3 increases from 1% to 5%.
摘要：为了降低光伏电池板温度、提高光电转换效率，本文设计了一种带有平行冷却流道的PV/T系统，并结合实验与仿真研究手段，构建了涵盖能源、㶲、经济和环境性能的4E分析方法全面评估了PV/T系统性能。首先，以水为冷却介质进行实验研究，结果表明PV/T系统可减少日CO2排放量1682.47–1705.98克，与无冷却的PV系统相比，PV/T的冷却模块可使电效率和环境性能分别提高12.19％和6.2％。当水的质量流量从0.017 kg/s增加到0.023 kg/s时，电效率、热效率和总效率分别提高了3.82％、11.36％和8.27％。其次，基于实验结果建立了数值模拟模型，用于仿真PV/T 系统在采用不同纳米流体作为冷却介质（包括 Ag、Al2O3 和 SiO2）时的运行情况。模拟结果表明，基于 Al2O3 纳米流体的 PV/T 系统具有较高的应用价值，电效率可达 15.13%。当 Al2O3 的体积分数从 1% 增加到 5% 时，其热效率可提高 5.43%。
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引用格式
ZHOU Yuan, WANG Jiangjiang, QIN Yanbo, LIU Boxiang, Performance Assessment and Improvement of Photovoltaic-Thermal System based on Energy, Exergy, Economic and Environment Analysis, Journal of Thermal Science, 2024, 33(6): 2166-2178.
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