Analysis of a Solar Space Cooling System Using Liquid Desiccants

[+] Author and Article Information
P. Gandhidasan

Mechanical Engineering Department, Texas Tech University, Lubbock, TX 79409

J. Energy Resour. Technol 112(4), 246-250 (Dec 01, 1990) (5 pages) doi:10.1115/1.2905767 History: Received May 12, 1990; Revised October 16, 1990; Online April 16, 2008


For tropical countries, solar space cooling is an attractive proposition. Dehumidification of air in hot, humid climates is almost as important as cooling. Removal of moisture from the air is much easier to achieve than cooling the air. The proposed cooling system operates on the ventilation mode. The ambient air is dehumidified using liquid desiccants followed by adiabatic evaporative cooling. The desiccant soon becomes saturated with the water extracted from the air and can be regenerated by using solar energy. For this system, a simple expression is derived in this paper to predict the amount of heat removed from the space to be conditioned in terms of known initial parameters through a simplified vapor pressure correlation and effectiveness of the dehumidifier and the heat exchanger. The effect of ambient air conditions, solution concentration, the cooling water temperature and the effectiveness of the dehumidifier and the heat exchanger on the performance of the cooling system are also discussed in this paper.

Copyright © 1990 by The American Society of Mechanical Engineers
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