Experimental Investigation Of The Effect Of Meteorological Factors And Dust Deposition On The Performance Of Solar Cell Modules

Energy is an important basis for the survival and development of humankind,with the development of economy and the progress of the society,the demand for energy grows larger and larger,and the growing depletion of the traditional fossil energy,which cannot meet the needs of human economic development.Looking for the renewable alternative energy is imperative,and solar photovoltaic power generation as a clean renewable energy,has been paid attention in various countries and widely used.After years of development,the solar photovoltaic technology is approaching maturity,but the efficiency of solar cell modules is still relatively low,especially for the commercial solar cell modules,generally less than 20%.Furthermore,during the actual operation,its performance will be affected by a variety of factors,for e.g.,the module temperature and dust deposition on the surface.The solar cell modules temperature is related to meteorological factors such as ambient temperature,solar radiation intensity,wind speed and wind direction.In order to improve the performance of solar cell modules,maximize access to energy from the sun,it is necessary to study the influence of meteorological factors on the solar cell modules temperature and the effect of dust deposition on the performance of solar cell modules.Firstly,according to the existing theory of photovoltaic power generation,establishing the mathematical model of the solar cell modules temperature and ambient temperature,solar radiation intensity,wind speed and wind direction.Then set up the experiment platform,under no-load and load conditions,validating the established mathematical models based on the measured data.Based on that,analyzes the effect of the wind speed,solar radiation intensity,and ambient temperature on the temperature of solar cell modules.The calculation results show: the temperature of solar cell modules decreases linearly with the increase of wind speed,increases linearly with the increase of solar radiation intensity,and increases linearly with the increase of ambient temperature.When the wind speed increases,the temperature decrease rate of the solar cell modules is affected by the solar radiation intensity,the greater the solar radiation intensity,the greater the temperature decrease rate,and the temperature decrease rate has nothing to do with the ambient temperature.When the solar radiation intensity increases,the temperature increase rate of the solar cell modules is affected by the wind speed,the smaller the wind speed,the higher the temperature increase rate,and the temperature increase rate has nothing to do with the ambient temperature.The temperature of solar cell modules varies with ambient temperature,and their variation degree is almost the same.Secondly,the effect of dust deposition on the temperature of solar cell modules was studied by comparing the experiment under the condition of no-load and load.The results show that: the effect of dust deposition on the solar cell modules temperature is mainly affected by the transmittance decrease which caused the solar radiation absorption energy decrease.In the sunlight,the dust deposition can reduce the module temperature,and the module temperature decreased with the increase in dust density.Finally,the influence of dust deposition on the relative transmittance of solar cell modules and the relative output power rate of solar cell modules is quantitatively analyzed by laying different density of dust on the solar panels.The research results show that: with the increase of dust density,the relative transmittance of solar cell modules decreased logarithmically,the relative output power rate decreased linearly,but for the same dust deposition density,the percentage reduction of the relative output power rate is lower than that of the relative transmittance,which is due to the photoelectric conversion efficiency increased as the dust deposition reduced the module temperature.Dust deposition has a great influence on the working current of the solar cell modules,but it has little influence on the working voltage,so the decrease of the output power of the solar cell modules is mainly affected by the decrease of the working current.