On-line version ISSN 2413-3051
Print version ISSN 1021-447X
J. energy South. Afr. vol.21 n.3 Cape Town 2010
George Vicatos; E. Krafft
Department of Mechanical Engineering, University of Cape Town
This paper presents a pumping method in absorption refrigeration where a vapour-driven pump is to replace the electricity-driven pump. The vapour pump is driven by a fraction of the generator's hot, high-pressure, vapour mixture. The refrigerator is thus exclusively heat-powered and rendered independent of the availability of electricity as the main energy source. The design and operation of the vapour pump is presented. The results obtained by a computer simulation program show a decrease in performance (COP), which is confirmed by the data obtained from a 1 kW cooling capacity refrigerator. Peak performances occur at higher generator temperatures when compared to a cycle using an electricity-driven pump.
Keywords: vapour pump, absorption refrigeration
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Received 20 June 2009
Revised 20 August 2010