Applied Research On Photovoltaic Adjustable External Shading In Chongqing

In the hot areas of southern China,the summer temperature is high and lasts for a long time,and the intensity of solar radiation is large.The solar radiation that enters the room through the outer window brings many problems such as poor indoor thermal environment and severe glare.But sufficient solar radiation also provides great potential for the application of solar photovoltaic technology.On the one hand,the external solar shading device for photovoltaic activities can improve the indoor light and heat environment,and on the other hand,the use of sufficient solar energy in summer to generate electricity can supplement indoor lighting and night lighting needs.Research scholars at home and abroad have conducted a series of mature studies on the performance of all aspects of external shading facilities and the energy characteristics of photovoltaic systems.However,in terms of the effect of solar shading outside the photovoltaic activities and the multi-target control strategy,there is a lack of corresponding practical application test support.This paper first analyzes the impact and evaluation of solar radiation and sunshade measures on the indoor light and heat environment,and further analyzes the power generation theory and influencing factors of the photovoltaic system on the basis of sunshade facilities.Provide a theoretical basis for the design and regulation of photovoltaic activities outside shading devices.In order to study the influence of different forms of photovoltaic active external shading devices on the indoor light and heat environment and the operation of photovoltaic shading power generation system.This article takes the Chongqing area of China as an example,developed and applied three types of photovoltaic external shading devices in an office building in Chongqing,and carried out different external shading forms under different weather and different angles of indoor illuminance,indoor solar radiation,photovoltaic power generation in summer and winter Amount of experimental testing.Through the analysis of the basic situation of the indoor solar thermal environment,the effect of photovoltaic outdoor sunshade facilities on the indoor solar thermal environment,the photovoltaic system power generation effect and the supplementary effect on artificial lighting,the application of photovoltaic outdoor sunshade devices in this area was verified.Finally,based on the multi-objective requirements of the indoor light and heat environment in Chongqing,the multi-objective optimization was carried out using the grey correlation analysis method.On the basis of this optimization strategy,combined with different angles and different forms of external shading facilities to improve the indoor light and heat environment,three photovoltaic activity external shading forms in summer and winter control strategies were proposed.Provide a reference for the design and regulation of photovoltaic activities outside sunshade measures in Chongqing area.