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Air cycle air conditioning: analysis of different configurations.

Author(s) : GRAZZINI G., MILAZZO A.

Summary

Air conditioning for passenger transportation needs a global approach. For a railway operator, maintenance costs can overcome energy costs and air conditioning failure can seriously affect customer satisfaction. Sealed refrigeration circuits introduce a failure mode, while air cycle refrigeration systems, although less efficient, can be conceived as open cycles, avoiding the need for a closed circuit. From the experience accumulated in existing air cycles for terrestrial use, low pressure cycles seem best suited for this application. These systems expand ambient air through a turbine, lowering its temperature. This cold flow draws heat from the passenger compartment air through a heat exchanger and then is brought back to ambient pressure by a compressor. Part of the compression work comes from the turbine. In this paper, some basic alternative configurations are analyzed. Air humidity is accounted for. Heat recovery is pursued.

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Details

  • Original title: Air cycle air conditioning: analysis of different configurations.
  • Record ID : 2011-0307
  • Languages: English
  • Source: IIR/Eurotherm sustainable refrigeration and heat pump technology conference. Proceedings of the Eurotherm Seminar No. 88, Stockholm, Sweden, June 13-16, 2010.
  • Publication date: 2010/06/13

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