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IIR document

Natural circulation defrosting with propane in horizontal evaporators of large capacity air-to water heat pump.

Number: pap. 1194

Author(s) : OLTERSDORF T., BRAUNGARDT S., SONNER C., et al.

Summary

This paper presents natural circulation defrosting for a large capacity horizontally mounted evaporator designed for a propane refrigeration cycle. This defrosting method is based on a two-phase thermosiphon. It is mounted as an additional loop next to a nominal refrigeration circuit to allow switching between the completely different requirements for refrigerant charge either in nominal heat pump operation or in defrosting mode. A fin-and-tube heat exchanger with 5mm round tube with a conventional 32 port nozzle distributor was successfully tested. Considered design criteria, thermal performance and analysis of the defrosting process are presented.

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Pages: 8 p.

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Details

  • Original title: Natural circulation defrosting with propane in horizontal evaporators of large capacity air-to water heat pump.
  • Record ID : 30019201
  • Languages: English
  • Source: 12th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
  • Publication date: 2016/08/21
  • DOI: http://dx.doi.org/10.18462/iir.gl.2016.1194

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