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IIR document

Low GWP refrigerant for stationary applications.

Number: 0623

Author(s) : FLOHR F., MACRI C., LEON A. de

Summary

Refrigerants play an important role in the environmental sustainability of refrigeration, air-conditioning, and heating, both in terms of direct refrigerant emissions and energy efficiency of the equipment operation.
The revised EU F-Gas regulation reduces the further use of hydrofluorocarbons (HFCs) and refrigerant mixtures containing HFCs with high Global Warming Potentials (GWPs).
At the same time, the use of some natural refrigerants with lower GWPs, which are not subject to F-gas regulation, reaches safety limits towards high pressure or flammability.
This is the case in several applications, where the safety guidelines of hydrocarbons (HCs) and the building codes, as well as the surrounding conditions, set limits.
R-474A is classified as an A2L refrigerant according to ISO817. Compared to A3 classified HCs, R-474A can be installed in larger quantities in accordance with safety standards such as EN378 or ISO5149.
The presentation will briefly address the current legal situation in Europe.
Potential areas of application are identified based on existing safety standards.
The main part presents results from studies of oil compatibility, compressor and system performance, and the usability of R-474A in stationary air conditioning (AC) and heat pump (HP) under the use of current series appliances as drop-in to evaluate a possible adoption.
An outlook on the further development program concludes the lecture.

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Pages: 7

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Details

  • Original title: Low GWP refrigerant for stationary applications.
  • Record ID : 30033310
  • Languages: English
  • Source: 11th IIR Conference on Compressors and Refrigerants.
  • Publication date: 2024/09
  • DOI: http://dx.doi.org/10.18462/iir.compr.2024.0623

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