IIR document

Discussion of the feasibility of the Einstein refrigeration cycle.

Author(s) : MEJBRI K., BEN EZZINE N., GUIZANI Y., et al.

Type of article: Article, IJR article


A careful modelling of the thermodynamic properties of the water-ammonia-butane system, the working fluid mixture used in the Einstein cycle, with the Patel-Teja cubic equation of state is performed. Numerical simulation is used to investigate the feasibility limits of this refrigeration cycle. Two modified configurations of the cycle are considered. A conflict between the evaporator and the condenser/absorber operating conditions is noted. The condenser/absorber operation needs a higher system pressure, which limits the refrigeration temperature in the case of air cooling. On the other hand, the condensation of ammonia and the presence of a small quantity of water in the evaporator limit also the refrigeration temperature. In the case of a water-cooled machine, with a condenser/absorber temperature of 30 °C, the cycle COP reaches 0.19 which is still low.

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Pages: 60-70


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  • Original title: Discussion of the feasibility of the Einstein refrigeration cycle.
  • Record ID : 2006-0735
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 1
  • Publication date: 2006/01


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