| Today's society is an era of rapid economic development and energy consumption,but at the same time there is an energy crisis,the problem such as atmospheric pollution,global warming and other issues,curb the further development and utilization of traditional energy,the new energy use has been paid more and more attention.With the clean and environmentally friendly,large storage capacity,widely distributed solar energy has become the focus of modern energy,came into being the solar photovoltaic power generation has been an unprecedented development in real life.Among them,high concentrated photovoltaic system with its high conversion efficiency much attention of domestic and foreign scholars.Therefore,this paper makes a comparative analysis of the power generation characteristics of high concentrating photovoltaic cells under different working conditions to optimize the power generation performance of gallium arsenide batteries.The composition and working principle of Fresnel concentrating photovoltaic generation system are introduced,and do experimental study for the output characteristics of Fresnel concentrating photovoltaic system with the influence of irradiation intensity and heat dissipation method etc.The influence of the output characteristics of the gallium arsenide cell was investigated by adding the thermoelectric generator to form the Fresnel concentrating photovoltaic-thermoelectric generation system.The results show that use water cooling heat dissipation than use finned heat dissipation of the best power output increased by 15.25% and 15.25% respectively when the irradiance is 660 W / m2 and 768 W / m2,and using water cooling has been bigger than using finned heat dissipation of the open circuit voltage,and the output is more stable.With the decrease of irradiation intensity,the open circuit voltage of solar cells with finned air dissipation is increasing,both of the variation trend is opposite.When the irradiance is 840 W / m2,the short circuit current ISC and the open circuit voltage UOC of the gallium arsenide battery are reduced by 0.041 A and 0.4V respectively after increasing the temperature difference.After increased thermoelectric generator and the best efficiency of the solar cell is reduced by 2.66%.To do the numerical simulation of the temperature distribution of the solar cell backplane by ANSYS Icepak,analyzed the relationship between the backplane temperature of the gallium arsenide battery and the irradiance intensity,the ambient wind speed and wind direction.The results show that when the irradiance is 852 W / m2 and the wind speed is 2.3m/s,the maximum temperature of the battery with cooling wind transverse fins is 1.79 times higher than in the direction of the fins,the lowest temperature rises 2.28 times,the cooling effect of cooling air along the fins is much better than sideways fins.When the other weather parameters are constant,the center highest temperature of the battery backplane decreases from 103.09 ? to 66.87 ? when the wind speed from 1m/s to 4m/s,the range is 35.13%.Finally,the simulation results are compared with the actual temperature cloud images taken by the infrared imager.The results show that the simulated temperature fluctuates near the actual temperature curve.Through the test of the temperature field of the disc focal spot,it is determined that the reasonable installation range of the solar cell is 655mm-715 mm with the irradiation intensity.Design and installation of the disc type concentrating photovoltaic system,including four concentrating batteries are series arranged in two rows and two columns,the chip cutting and assembly,the application of the insulation between the baffle and the battery array,and the design of the water cooling system and fixed,so as to ensure that the gallium arsenide battery work safely in the disc concentrator. |
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