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Numerical analysis of CO2 transcritical cycles using semihermetic reciprocating compressors for small cooling applications: study of the internal heat exchanger influence under real working conditions.

Author(s) : RIGOLA J., ABLANQUE N., PÉREZ-SEGARRA C. D., et al.

Summary

The aim of this paper is to show the possibilities that CO2 offers for commercial refrigeration, considering a single stage transcritical cycle, using semihermetic reciprocating compressors, under small cooling capacity systems. This work is a numerical study of whole refrigerating equipments in general, and reciprocating compressors in particular, using CO2 as fluid refrigerant under real transcritical cycle application, specially focused on high-medium back pressure working conditions. Based on both numerical simulation model for hermetic reciprocating compressors, and a detailed numerical simulation of single stage vapour compression unit behaviour developed by the authors, an extensive numerical analysis is presented in order to understand the thermal and fluid dynamic behaviour of these systems, and the influence of using internal heat exchangers in order to improve the cycle performance. In that sense, the results obtained not only for the semihermetic reciprocating compressor numerically modelled, but also for the transcritical refrigeration cycle simulated under real application conditions for high-medium back pressure capacity systems show the possibilities of these equipments using carbon dioxide as fluid refrigerant.

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Pages: ICR07-D1-1089

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Details

  • Original title: Numerical analysis of CO2 transcritical cycles using semihermetic reciprocating compressors for small cooling applications: study of the internal heat exchanger influence under real working conditions.
  • Record ID : 2008-0508
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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