Simulation And Experimental Study On Photovoltaic/Thermal Systems

This thesis presents a simulation and experimental study of a Photovoltaic/ Thermal Systems (PV/T) and solar cells in Tianjin. Most of the absorbed solar radiation by solar cells is not converted to electricity but increases their temperature, reducing their electrical efficiency. The photovoltaic temperature can be lowered by heat extraction with a proper natural or forced air circulation. An interesting alternative to plain solar cells is to use hybrid Photovoltaic/Thermal (PV/T) systems, which consist of solar cells coupled to heat extraction devices, providing electricity and heat simultaneously.The thesis introduce the principle of the solar cells and solar heat absorber,and analyzes development level and using actuality of the PV/T systems at home and abroad and makes a summarize for this question.We do an experimental study on amorphous silicon cell PV/T systems and solar cells. Base on the radiation of Tianjin, the total PV efficiency of amorphous silicon cells is 4.4%,and multi-crystal silicon cells is 8.5%.when cooling by a natural air circulation , the total PV efficiency of amorphous silicon cells is 4.56%,thermal efficiency is 26.1%,integrated energy efficiency is 38.1%. when cooling by a forced air circulation , the total PV efficiency of amorphous silicon cells is 4.61%,thermal efficiency is 32.8%,integrated energy efficiency is 44.9%.Set up a heat transfer model of amorphous silicon cell PV/T systems. simulation on the Photovoltaic/Thermal Systems and solar cells based on the weather parameter in Tianjin. The result of the simulation is a little bigger than the experiment.