Research progress on solar photovoltaic/thermal system based on microencapsulated phase change material suspension
In the solar photovoltaic/thermal(PV/T)system,the high temperature of photovoltaic cell will lead to the decrease of solar power generation efficiency.Microencapsulated phase change material suspension(MEPCMS)is a kind of latent heat functional fluid.MEPCMS can function as cooling medium in solar PV/T system to effectively reduce the temperature of photovoltaic cell and improve its energy utilization rate.In view of easy leakage and poor thermal conductivity of microencapsulated phase change material,modification methods are proposed for photothermal conversion to improve the comprehensive performance.Based on the performance evaluation index,the factors affecting the performance of solar PV/T system are analyzed.It is found that flow rate,concentration,and solar irradiation are the key factors affecting the heat transfer performance of MEPCMS in the solar PV/T system.Appropriately increasing its concentration and flow rate can enhance the heat transfer performance of working medium,which can reduce the photovoltaic panel temperature and increase its solar radiation and thermoelectric output.However,it is necessary to reasonably match the concentration and flow rate of working medium with solar irradiation.Future research can focus on improving the heat transfer performance of MEPCMS in the solar PV/T system,exploring the relationship between operating parameters and solar irradiation,optimizing the collector structure,and solving the intermittency of solar energy with its heat storage.
microencapsulated phase change material suspensionphotovoltaic/thermal systemheat transfer performancethermoelectric efficiency
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