Dynamic study of liquid desiccant regeneration system operating in vacuum condition

Abstract

This study represents the development of a mathematical model for a newly proposed Absorption-based Liquid Desiccant Regeneration (ALDR) system operating in vacuum condition. The dynamic model is developed based on the internal and external enthalpy balances and mass balances in generator and condenser in the ALDR system. The relevant governing equations are developed and the dynamic operation is then simulated to study the dynamic performance of the system. The model is able to predict the relevant parameters such as the internal and external temperature in each component, solution concentration, vacuum pressure and thermal power throughout the regeneration process. The approach used is simpler as detailed enthalpy at each state point can be avoided. The rate of evaporation and condensation in the regeneration system is also being focused here. This information will be useful for the elaboration of control system in the future.