Experimental Study on a Linear Concentrating Solar Photovoltaic/Thermal System

摘要

A set of solar photovoltaic and thermal combined(PV/T)system is installed and tested in the present study.The PV/T system is designed and constructed by integrating coiled-channel flat-plate collectors with polycrystalline silicon PV modules.The linear Fresnel lens acts as the concentrator.Three systems,i.e.the non-cooling PV system,the non-concentrating PV/T system and the concentrating PV/T system,are tested and analyzed.Experimental results show that a high thermal and electrical combined efficiency,over 65％,is achieved by the PV/T system.Water in the flat plate can significantly decrease the PV module temperature and improve the electricity-conversion efficiency.Comparing with the non-concentrating PV/T system,the concentrating PV/T system can increase the total utilization of solar energy.