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Modelling and development of high-pressure-lift ejector for low temperature evaporators in R744 refrigeration systems for supermarkets.

Number: pap. n. 307

Author(s) : BANASIAK K., PARDIÑAS A. A., KRIEZI E. E.

Summary

Decreasing the complexity of R744 commercial refrigeration systems for supermarkets could substantially reduce their cost, promoting worldwide spreading. Typically, the share of the low-temperature (LT) load in the total load for supermarkets is low. Nevertheless, significant investments must be made to cover this demand, including dedicated compressors, inverter, desuperheater, oil management equipment, etc. The objective of this paper is to describe and numerically validate a new concept based on high-pressure-lift ejector to support LT evaporators. This solution reduces the cost of the system by replacing the whole LT compressor section with a fixed geometry ejector. In addition, elimination of the compressor(s) allows overfeeding operation of LT evaporators. The paper explores application range of this concept, using a 0-dimensional model of the refrigeration system.

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  • Original title: Modelling and development of high-pressure-lift ejector for low temperature evaporators in R744 refrigeration systems for supermarkets.
  • Record ID : 30026194
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0307
  • Document available for consultation in the library of the IIR headquarters only.

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