IIR document

Real energy efficiency of DX NH3 versus HFC.

Number: pap. n. 466

Author(s) : JENSEN S. S.


The paper details the decommissioning of several existing HFC based, air-cooled refrigeration plants servicing a refrigerated warehouse and replacement of these with a central, low charge, dry expansion, NH3 based refrigeration plant. Comparisons are shown between the recorded energy performances of the new DX, NH3 system and those of the previous HFC based systems. The basis of this comparison are the supply authority records of the electrical energy consumed by the HFC plant and the consumption records generated using the SCADA system of the new ammonia plant. The geographic location of the plant is Mackay, North Queensland, Australia. High ambient dry bulb/wet bulb temperatures characterize this region. The paper discusses the technical and economic viability of NH3 DX based solutions for the small to medium capacity range such as this. Technical details and images of the former HFC plant as well as the replacement DX type, central NH3 installation are also provided.

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Pages: 8


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  • Original title: Real energy efficiency of DX NH3 versus HFC.
  • Record ID : 30026201
  • 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.2019.0466


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