American Journal of Applied Sciences

On the Optimum Numbers of Stages in Vapour Compression Refrigeration Systems

Durriye Bilge and Galip Temir

DOI : 10.3844/ajassp.2004.71.75

American Journal of Applied Sciences

Volume 1, Issue 2

Pages 71-75


In this study, cases of single-stage and multi-stage compression have been compared and contrasted through various angles while concentrating on refrigeration systems with 600 kW cooling capacity and working with ammonia. For five different numbers of stages, power consumption, costs of investment, operation and maintenance (O and M), COP and 2nd law efficiencies have been calculated. As the amount of stages increase, power consumption decreases. The payback period of the gain from this decrease has been calculated as far as the increasing investment expenditures are concerned. Dimensionless profit factor has been calculated according to each case and presented in the diagram.


© 2004 Durriye Bilge and Galip Temir. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.