Adsorption Cooling Performance Simulation of Silica Gel-Water Pair
Global warming is the current issue that we have right now which is caused by the greenhouse gases. Refrigeration technology such as the adsorption cooling system does not release greenhouse gases in the air. This is due to the fact that the system only uses water as its working fluid. In this project, the silica gel-water is used as a working pair for the adsorption cooling system. The water is the adsorbate, while the silica gel is the adsorbent. The first objective of this study is to compare the simulation result from MATLAB software and the experimental result based on the previous research. The second and third objective are to determine the optimum adsorption/desorption time as well as precooling/preheating time based on the MATLAB simulation. Several mathematical equations are needed in order to develop one stage with two beds adsorption cooling system in MATLAB. The required equations are the adsorption kinetics, adsorption isotherms, COP (Coefficient of Performance), mass balance, heat and energy balance for system beds, condenser as well as evaporator. Adsorption, desorption, preheating and precooling are the processes in this system. By using these processes, four distinct modes are generated and named as Mode A, B, C and D. In this study, there are 3 conditions for the inlet temperature of chilled water, hot water and cooling water. The comparison between the simulation result and experimental result will be made in terms of the COP and the temperature profile of adsorber as well as evaporator.
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