Effect of Operating Conditions on the Performance of Two-Bed Closed-Cycle Solid-Sorption Heat Pump Systems

[+] Author and Article Information
W. Zheng, W. M. Worek

Department of Mechanical Engineering (m/c 251), The University of Illinois at Chicago, 842 W. Taylor Street, Chicago, IL 60607-7022

G. Nowakowski

Gas Research Institute, 8600 W. Bryn Mawr Avenue, Chicago, IL 60631-3562

J. Sol. Energy Eng 117(3), 181-186 (Aug 01, 1995) (6 pages) doi:10.1115/1.2847770 History: Received May 01, 1994; Revised January 01, 1995; Online February 14, 2008


The effect of two operating parameters, the regeneration temperature and the ambient temperature, on the performance of two-bed, closed-cycle solid-sorption heat pumps is investigated. The results show that increasing the regeneration temperature can improve both the COP and cooling capacity, and the effect on cooling capacity is more significant than the COP. Increasing the regeneration temperature from 180°C to 260°C, the cooling capacity increases by 50 percent and the COP improves 20 percent. When the ambient temperature drops, the system performance increases significantly. When the ambient temperature decreases by 10°C from the design point of 35°C, the COP and cooling capacity increases by 50 percent and 40 percent, respectively. Also, the bed cycling speed should be increased to achieve the optimum system performance when the regeneration temperature is higher or the ambient temperature becomes lower.

Copyright © 1995 by The American Society of Mechanical Engineers
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