Numerical study of a three-stage adsorption chiller with different mass ratios

Abstract

The performance of three-stage chiller with different mass allocation among upper, middle and bottom beds has been investigated numerically to determine the influence of the heat source temperature on cooling capacity, COP, and chilled water outlet temperature. It is found that the chiller can be driven effectively by the waste heat of temperature 50 °C with the heat sink at environment temperature. Results show that cooling capacity can be improved with the optimum allocation of adsorbent mass to the bottom beds than that to the upper two beds. The improvement in Coefficient of Performance (COP) values ,however, is less significant. It is also seen that the improvement in cooling capacity is more significant for the relatively higher heat source temperature. Results show that cycle performance is strongly influenced by the performance of the chiller. It is also seen that COP shows better result for large value of time cycle.