Performance Research And Exergy Analysis Of CPC Energy-supply Oil-bath Solar Adsorption Refrigeration

Scholars all over the world have done a lot of in-depth research on the optimization of adsorption refrigeration system structure,the improvement of adsorption bed heat transfer efficiency,such as increasing heat transfer area,reducing thermal resistance,or finding more efficient and suitable refrigerant pairs.Traditional solid-state adsorption refrigeration systems are powered by electric heating/water heater heating water bath,direct sunlight,and oil bath.The direct drying refrigeration system is greatly affected by the weather,the electric heating energy supply is too much to consume non renewable energy,and the water bath adsorption refrigeration system is not conducive to improving the system performance because of the large specific heat capacity of water and only reaching the boiling point.Therefore,to find clean,environment-friendly high-temperature heat source and heat transfer medium with good heat conduction effect and low specific heat capacity has become the research direction of adsorption refrigeration energy supply.The main feature of the composite parabolic concentrator is to concentrate the light on the heat pipe so that the maximum heat capacity of the heat pipe can reach 400?,while the specific heat capacity of the heat transfer oil is small,which can maintain good physical and chemical properties and heat conductivity at400?.In view of the above situation,this paper designs and builds a set of adsorption refrigeration system with composite parabolic concentrator?CPC?heating conduction oil for energy supply.This system can effectively solve the problems faced by the different energy supply methods mentioned above.Based on the above design,this article has carried out the following work:1.Designed an oil bath adsorption refrigeration system powered by a compound parabolic concentrate collector?CPC?,which specifically includes an adsorption bed composed of 4×4 adsorption tubes,an evaporation chamber,a condensation box,a liquid collection bottle,etc.Components,and built and debugged.which are built and debugged2.In this paper,the concentrating and collecting process of the compound parabolic concentrate collector?CPC?in different directions?normal south,normal West?,different incident half angles?10°to 60°?,different angles?10°to 60°?,and different months of the year are analyzed theoretically.At the same time,the performance of the compound parabolic concentrate collector?CPC?with different inclination,different velocity?0.0252kg/s,0.0351kg/s,0.0375kg/s?and different number of blocks are tested.3.Two pieces of CPC and three pieces of CPC are used to directly supply energy for the adsorption refrigeration system.The effects of the maximum energy supply temperature and time on the desorption,cop_system and cop_cycle under different inclinations and flow rates are explored.The results show that the maximum temperature of the three CPCs is 114?,the minimum temperature is 106?,the longest time of continuous energy supply is 6h,the maximum desorption of the system is 1.45l,and the minimum is1.15l,The maximum of copsystem is 0.044,the minimum is 0.034,the maximum of copcycle is 0.209 and the minimum is 0.09.In the constant volume heating process,shortening the time when the system reaches the maximum temperature is conducive to improving the performance of the system.4.The theoretical absorption of the absorption refrigeration system with composite parabolic concentrator?CPC?was carried out.The results show that the largest components of the absorption refrigeration system are the adsorption bed and the condenser,and the corresponding proportion of the maximum losses in the system is 54%and 30%,respectively.In the process of constant pressure desorption,the loss of adsorption bed increases with the increase of heating temperature and decreases with the increase of condensing pressure,with the maximum change rate of 73%and 59%respectively;the efficiency decreases with the increase of heating temperature and decreases with the increase of condensing pressure,with the maximum change rate of 20%and 22%respectively.In the process of constant volume cooling,the loss of condenser increases with the increase of heating temperature,and decreases with the increase of condensing temperature,with the maximum change rate of 79%,74%;the efficiency decreases with the increase of heating temperature,with the increase of condensing temperature,with the maximum change rate of 48%,45%;the loss of evaporator increases with the increase of cooling temperature of adsorption bed,With the increase of evaporation temperature,the maximum change rate is 73%and 59%respectively,and the maximum change rate is 0.8%and 2%respectively.Compared with the other two schemes,the operation efficiency of scheme 2 is the best.Specifically,the maximum desorption capacity of the system can be increased by 44%,the maximum heat capacity of the system can be increased by 38%,the maximum cooling capacity of the system can be increased by 38.9%,and the maximum cop of the system can be increased by 16%.The oil bath adsorption refrigeration system powered by the compound parabolic concentrating collector?CPC?proposed in this paper can efficiently and stably output the cooling capacity.After the experiment process is completed,the heat of the heat transfer oil can be transferred through heat Secondary use.The theoretical results obtained in this paper are highly similar to the experimental values.The research in this paper provides a certain reference and value for the improvement of adsorption refrigeration performance and the selection of heat sources...