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Investigations of heat transfer and components efficiencies in two-phase isobutane injector.

Number: pap. 2604

Author(s) : SMIERCIEW K., BUTRYMOWICZ D., BERGANDER M. J., et al.

Summary

Renewable energy sources may be applied to drive refrigeration and air-conditioning systems, e.g. solar radiation, geothermal resources, heat derived from biomass or waste heat rejected form various thermal processes. In this case absorption refrigeration systems and ejection systems may be used for cooling applications. In both these systems the crucial problem is development of a suitable liquid pump. Energy consumption to drive these systems is not a major problem here as in most cases amount of energy required to drive a mechanical pump is a contribution of at most a few percent of the overall energy balance of the system and in most cases is of the order of magnitude 1%. Therefore, the most important problem is a special difficulty to select of a commercially available liquid pump for the thermal driven cycle (absorption or ejection one). Two-phase injector can be applied as a liquid pump in the ejection refrigeration systems. Paper deals with experimental investigations of the two-phase vapor-liquid injector as a liquid pump in refrigeration systems. The selected experimental results of the injector are presented for the case of isobutane as a working fluid. Investigations covered heat transfer coefficient as well as evaluation of the efficiencies of the components of the injector. It was demonstrated that these efficiencies depend on operation parameters and may not be treated as contact quantities.

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Pages: 8

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Details

  • Original title: Investigations of heat transfer and components efficiencies in two-phase isobutane injector.
  • Record ID : 30024669
  • Languages: English
  • Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2018/07/09

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