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Ejector refrigeration systems for waste heat recovery applications: effects of condensation on performance.

Number: pap. n. 588

Author(s) : LITTLE A. B., GARIMELLA S.

Summary

As worldwide electricity demand increases and stresses electricity grids to the point of collapse, energy-saving devices have assumed increasing importance. Waste heat recovery systems are currently being considered for applications in air conditioning and refrigeration, like the ejector-based chiller considered here. The key ejector component is a steady-state device with no moving parts, obviating the need for lubricating oils, maintenance, or expensive repairs. An ejector-based chiller is constructed and experiments are conducted to demonstrate cooling over a range of conditions with a miniaturized ejector. It has been hypothesized that the occurrence of condensation at some operational conditions can be used to passively enhance momentum transfer and reduce losses within the ejector. This study experimentally determines the effect of flow condensation on ejector performance and, with analytical treatments of the expected degree of condensation within the ejector itself, uses this information to provide guidance on achieving maximum ejector efficiency and system COP.

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Pages: 9 p.

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Details

  • Original title: Ejector refrigeration systems for waste heat recovery applications: effects of condensation on performance.
  • Record ID : 30015676
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0588

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