On The Optimum Numbers of Stages in Vapour Compression Refrigeration Systems

Abstract

Abstract: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.

Evaluation on Expressions for Optimum Intermediate Condition of Two-Stage Vapor Compression Refrigeration Cycle

“…In this work, we focus on increasing efficiency of VC refrigeration cycle by using a multi-stage technique. The number of stages in the VC refrigeration cycle has been optimized by Bilge and Temir [3]. The study carried out on a VC refrigeration cycle with cooling capacity of 600 kW and using ammonia as a working fluid.…”