Absorberand Regenerator Models for Liquid Desiccant Air Conditioning Systems: Validation and Comparison Using Experimental Data

Abstract

Solar assisted air conditioning systems using liquid desiccants represent a promising option to decrease high summer energy demand caused by electrically driven vapor compression machines. The main components of liquid desiccant systems are absorbers for dehumidifying and cooling of supply air and regenerators for concentrating the desiccant. However, high efficient and validated reliable components are required and the design and operation have to be adjusted to each respective building design, location, and user demand. Simulation tools can help to optimize component and system design. The present paper presents new developed numerical models for absorbers and regenerators, as well as experimental data of a regenerator prototype. The models have been compared with a finitedifference method model as well as experimental data. The data are gained from the regenerator prototype presented and an absorber presented in the literature.

Modeling and optimization of vacuumed regeneration process for liquid desiccant dehumidification system

“…Researchers investigated the heat and mass transfer characteristics of the system to find out affecting parameters. M. Krause developed a model for absorber and regenerator in liquid desiccant air conditioning unit and validated the model using experimental data [14]. Resistances can be related to the overall heat transfer coefficient by using the heat transfer coefficient of both fluid sides and thermal conductance of the solid wall as below [6].…”