Parametric Study of Fixed-Bed Dehumidification Using a PCM-Containing Adsorbent for Effective Recovery of Heat of Adsorption

Abstract

A xed-bed dehumidifying adsorption process with a phase-change material (PCM)-containing mesoporous silica SBA-15 was simulated, and various key parameters were varied to identify the optimal conditions for adsorption. The e ectiveness of the PCM-containing SBA-15 adsorbent was evaluated based on the performance of the xed-bed dehumidifying adsorption process, i.e. the amount of water adsorbed per unit time. To this end, the enthalpy of fusion and amount of the inserted PCM, along with the uid temperature at the inlet of the adsorbent bed, were investigated as the key parameters governing the adsorption performance. Upon increasing both the enthalpy of fusion and the amount of the inserted PCM, the latent heat storage e ciency increased and the adsorption performance improved. Upon increasing the uid temperature at the inlet, the adsorption performance increased drastically. On modeling the PCMcontaining SBA-15 using the optimized conditions, the amount of adsorbed water was four times larger than that for the experimentally prepared PCM-containing SBA-15 in the initial stages of the process.