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Journal of Energy in Southern Africa

On-line version ISSN 2413-3051
Print version ISSN 1021-447X


VICATOS, George  and  KRAFFT, E.. Comparison between two different solution-pumping methods in absorption refrigeration machines. J. energy South. Afr. [online]. 2010, vol.21, n.3, pp.16-22. ISSN 2413-3051.

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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