A Simulation Test Research Of Sunshade Component' Shading Rate Based On Photoelectric Conversion

As one of the three areas of energy consumption,evergy consumption of building energy consumption in the proportion has reached 46.7%. The increase of building energy consumption,not only resulted in a shortage of the primary energy,but also contributed to the environmental pollution,global warming and water and soil losses.Therefore,building energy efficiency is becoming more and more important.Building shading is a way of building energy efficiency,which has the advantages of economical,practical and low energy consumption. Architectural shading is divided into three ways-external blinds,sunshade and local shading. One of the most simple and effective method is external blinds. There are two important parameters about the study of architectural shading-shading coefficient and shading rate. For the calculation of two parameters,a conventional method is to use the formula to calculate complexity and another is to use the software simulation. Due to the red tape of conventional method and the limitation of the simulation software,we need to explore new research method.This paper adopts the principle of photoelectric convension,using the output characteristic of the photocell as illumination change to study the changes of shading rate.Before the experiment,the thesis has done some analysis theoretical analysis and experimental test of connecting way to photovoltaic panels and the cooling way. Finally the thesis makes sure monocrystalline silicon photovoltaic modules choosing single chip,using series between the single chip,adopting the way of “heat pipe and water cooling” for cooling.By testing experiments,this paper concludes the relation between the shading rate,intensity of solar radiation and photovlataic component's open circuit voltage. To verify the feasibility of function,relating with architecture external blinds and photovoltaic component,this thesis uses the formula to calculating the change of shading rate in Guangzhou. Comparing the shadingrate testing by the building shading device and VE software simulation,the thesis finds that the shading rate using the device is larger than the simulation software of VE concluded,the biggest difference of 14.15%.Through the numerical and experimental simulation comparison,this thesis analyse the factor causing error.The results show that the influence of temperature on the output characteristic is obvious and the temperature can cause the component output voltage linear decrease. The nonuniformity of photovoltaic modules unit can also cause shading rate of error.