Numerical Calculation And Experimental Study Of Solar Semiconductor Refrigeration System

The consumption of non-renewable energy and the destruction of the ecological environment caused by the large use of HCFC-based refrigerants.As a renewable and clean energy source,solar energy has become the main energy source for future energy use development.Here,the advantages of solar photovoltaic power generation technology and semiconductor refrigeration technology are clean and pollution-free.Therefore,the integration of the two technologies has a very broad application prospect.This paper introduces the principle of solar photovoltaic power generation and the basic principles of semiconductor refrigeration,combining the two.On the basis of theory,the mathematical heat transfer model of the refrigeration system is established.The feasibility of the calculation method of the system cooling capacity and refrigeration coefficient is verified by comparison with the experimental values.In the experiment,the selection and design of the experimental components of the solar semiconductor refrigeration system were completed.The experimental research on the hot-end air-cooling,water-cooling and heat pipe cooling methods of the cooling fins was carried out,and the optimal heat dissipation mode and the best working voltage of the cold end of the refrigeration chip were obtained.The scope is further optimized on the basis of the optimal heat dissipation scheme,and the refrigeration air-conditioning box is designed to analyze the influence of different ambient temperature and voltage on its refrigeration performance.The research shows that: 1)When the hot end adopts three kinds of heat dissipation methods,such as air cooling,water cooling and heat pipe,under different voltages,the cooling capacity of the three heat dissipation modes has the same trend,and increases with the increase of voltage;Compared with the heat dissipation method,the water cooling method has the highest cooling capacity,and the water cooling heat dissipation is the best heat dissipation method,and the optimal working voltage range is determined to be 8V~12V.2)The heat transfer simulation results of the refrigeration system show that the cold junction temperature decreases with the increase of voltage,which is consistent with the experimental value at 6V~10V voltage;the error between the simulated value and the experimental value is 4.85%,and the lowest is 0.97%.3)Reconstruction of the optimized refrigeration system at different ambient temperatures,the cooling capacity and the refrigeration coefficient change trend,the temperature difference between the air outlet of the refrigeration system and the ambient temperature becomes larger as the ambient temperature increases.4)Reconstruction of the optimized refrigeration system at different voltages,with the increase of voltage,the cooling capacity gradually increased,at 12 V voltage,the highest temperature reached 25 ?,up to 96 W.The refrigeration coefficient can be reduced with the increase of voltage.Under different ambient temperatures,the cooling coefficient decreases.5)Compared with the water-cooled cooling system,the optimized cooling system has a small difference in cooling capacity between the optimized cooling system and the water-cooled cooling system at 10 V and 12 V.Under different refrigeration chip voltages,the refrigeration coefficient of the optimized refrigeration system is greatly improved,and the refrigeration coefficient is increased the most at 8V voltage,increasing by 28%.