Modelling and exergetic assessment of a sorptive heat exchanger for the application in a novel desiccant evaporative cooling cycle

摘要

A numerical, dynamic model of a counter-flow parallel plate sorptive heat exchanger was implemented in the modelling language Modelica. Simulation results showing the transient evolution of supply air temperature and humidity ratio are presented. A framework for the 2nd law assessment of sorptive heat exchanger evaluation is presented based on exergy analysis. Simulation results with respect to varying fresh air conditions and regeneration temperature are analyzed under this framework. The exergetic efficiency reaches a maximum at specific fresh air conditions and is highest at low regeneration temperatures. An improved system configuration is finally presented.