Fresh Questions, Practical Answers: PVsyst Q&A Series #16

1. What issues should be considered when simulating a photovoltaic power station on water using PVsyst? [Teacher Chen]: 1) Energy balance coefficient Installing PV modules on the water surface, in actual operation, due to the evaporation of water vapor on the water surface, the ambient temperature on the water surface will be lower than that on normal land, so the temperature of the modules will also be lower. According to the energy balance theory, the temperature of the modules is related to the ambient temperature, the irradiance on the inclined surface of the modules, the transformation efficiency of the modules, the absorption coefficient of the modules, and the U value (also known as the K value). U · (Tcell - Tamb) = Alpha · Ginc · (1 -Effic) Additionally, U = Uc + Uv · v, where Uc is a constant and Uv is a variable related to wind speed. →…