Performance Optimization of a System Integrating Solar Absorption Compression Refrigeration and Vacuum Membrane-based Dehumidification
For solar absorption cooling systems,it is difficult to generate lower chilled water for dehumidifying and cooling,as well as facing intermittency problems.In this work,the novel SACV system for indoor temperature and humidity control is proposed,which integrates the SSAR subsystem,the VCR subsystem,and the VMD subsystem.The VMD subsystem and the VCR subsystem solve the dehumidification difficulty and all-weather cooling problems,respectively.A thermodynamic model of the SACV system is established and validated.The effect of collector area and hot water flowrate on the collector outlet hot water temperature is analyzed,as is the effect on the performance of the collector,the SSAR subsystem,and the SACV system.In addition,the performance of the SSAR subsystem and the SACV system has been optimized.The results showed that the increase in the collector outlet hot water temperature resulted in the optimal performance of the SSAR subsystem.The SACV system operates at optimum performance by varying the collector outlet hot water temperature by varying the hot water flowrate.The collector area increased by 73.7%,the SSAR subsystem reached optimum performance with a 0.24%improvement and a 69.64%increase in cooling capacity,while the SACV system performance increased by 4.71%and power consumption decreased by 36.18%.However,the cost of the system has increased,so it is necessary to consider the performance of system and economic benefits.
Solar absorption refrigerationMembrane dehumidificationCollector outlet hot water temperatureOptimizatio
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