A new generation cooling cum desalination system employing multi-bed and two-evaporators : a simulation study

Abstract

This project presents the thermodynamic model of the adsorption cooling and desalination (ACCD) system and evaluate each component of the system. A simulation using the energy and mass balance is conducted to determine the optimal operating conditions of the system. Unlike the conventional system where the adsorption and desorption period is the same, this study presents a different timing scheme where the adsorption period is increased while the desorption time is reduced. Subsequently, a parametric study was done by varying the cycle time and hot water temperature to determine the best performing material out of the seven tested materials. The cycle time varied from 960s to 2240s while the waste heat temperature was varied from 60°C to 90°C. The performance of each system was compared based on specific daily water production (SDWP), cooling capacity and coefficient of performance (COP). It was found that the proposed system achieved a higher SDWP, COP and SCP than the conventional system. The results concluded that all the silica gel and AQSOA-Z05 based ACCD system were suitable to be used in low waste-heat temperature conditions. Their SDWP were higher than the conventional adsorption cooling system. The recommended operating parameters would be presented at the end of the report.