INTERNAL HEAT AND MASS TRANSFER MECHANISM OF SOLAR CPC CONCENTRATOR ADSORBER BASED ON CFD SIMULATION

With the global energy crisis and increasingly serious environmental problems, solar adsorption refrigeration system has been widely concerned because of its environmental protection characteristics and advantages of using renewable energy. In this paper, a new type of solar CPC adsorption refrigeration system is designed. By establishing the CFD model of the adsorption bed and using the finite control volume method, the heat transfer characteristics of the refrigerant in the desorption process of the adsorption bed are simulated and calculated, and the flow characteristics of the refrigerant in the adsorption bed and its influence on the surrounding wall are analyzed according to the changes of the temperature, phase and flow rate of the refrigerant. The results show that the refrigerant near the outlet of the adsorption bed is more likely to absorb heat and desorb. The average velocity of mixed-phase refrigerant is around 1m/s at the transverse section of the pipeline, and the temperature near the wall in the adsorption pipe can reach 360K. In the longitudinal direction, the velocity near the outlet pipeline is faster, and a small area of turbulence appears at the upper side.