Energetic and exergetic analysis of a commercial ammonia–water absorption chiller
by S. El May, I. Boukholda, A. Bellagi
International Journal of Exergy (IJEX), Vol. 8, No. 1, 2011

Abstract: The results of an energetic and exergetic analysis of a commercial water/ammonia air-cooled absorption chiller with a cooling capacity of 10 kW are presented and discussed. The comparison with a conventional-single effect chiller operating under the same conditions shows that to reach similar performances to those of pre-absorber equipped installation an additional heat transfer area in the air-cooled absorber is necessary to ensure the absorption of totality of the refrigerant. The second law analysis reveals that the highest exergy dissipation (75%) is located in the driving compartment and that the irreversible absorption process is responsible for an important part (45%) of the COP degradation.

Online publication date: Tue, 30-Nov-2010

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