Study On The Influence Factors Of PV System Efficiently Using Solar Energy

Energy is the lifeblood of the public production development, also is the core contentof the national strategy around the world. At the same time, due to the limited andnon-renewable of fossil energy, it will eventually be exhausted, and brings increasingenvironmental pollution. The development and utilization of renewable energy havebecome the only way of energy development. Solar energy is an important part ofrenewable energy, has large reserves, wide distribution and other characteristics. Recently,solar photovoltaic gets rapid development because it can convert solar energy directly intoelectricity. Conversely, low conversion efficiency has been restricting the development ofphotovoltaic power generation.Hohhot has good lighting conditions, and the solar energy utilization rate is high. So,this paper studies the influence of different ways on installing the PV system performance.In Hohhot, simulation and experimental study of the solar radiation that PV modulesgained under different installations, such as installation fixed angle, two-axis tracking,vertical axis tracking, and the north-south axis tracking. The results show that: the radiationof tracking device obtained is higher than horizontal plane, besides, the solar radiation oftwo-axis tracking, vertical axis tracking increase80%and68%; the characteristic ofmonthly utilization factor is high in summer and low in winter; the instantaneousutilization factor of two-axis tracking, vertical axis tracking and north-south axis trackinghas the characteristics of high at noon and low in the morning and evening; theinstantaneous utilization factor of37°angle changes smoothly throughout the day; for thegrid photovoltaic systems, vertical axis tracking has the lower cost, simple structure, so thechoice of the vertical axis tracking can get higher returns.This paper studies the performance of the PV/T system. This paper designed a"labyrinth" PV/T system, to improve the efficiency of photovoltaic components. Theresults show that: when the inlet water temperature is constant, the power of PV modulesincreased9.1%; when the water quality is constant, the power of PV modules increased7.3%, and the cooling water temperature can above35℃, what’s more, the primary-energysaving efficiency may reach up to about50%, greatly improving the utilization of solarenergy. Shadows of the PV modules will change its output characteristics. This paper studiesthe performance of the PV modules and PV system under the partially shaded conditions.This paper studies the output characteristics of the PV modules in different proportionsshadowing, as well as the PV systems in10%proportion shadowing. The results showedthat: any block of photovoltaic modules shade will cause the system output powerattenuation;10%shading of the PV module can result in85%power losses, and outputpower loss increases with the area of block; centralized shading caused more power lossesthan scattered shading.