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Use of HFC-410A in refrigeration plants to reduce refrigerant charge.

Author(s) : RIVET P.

Summary

As they are more environmental friendly, compared with HCFCs and HFCs, natural refrigerants are being developed in refrigeration plants. But CO2, HCs and NH3 have limitations due to some of their characteristics, respectively, working pressure, flammability and toxicity. In European countries, where HCFCs are banned in new plants, HFCs are widely used in small and medium refrigeration plants (food industries and retail sectors). They have zero ODP, are energy-efficient enough from -40 to 0°C and plant investment, as well as running costs are competitive. However, their GWPs are high, even if today, refrigerant charges and containment have been improved. In refrigeration applications, food production, storage, distribution, retail, the HFC R404A is mainly used for high temperature (-10 to -15°C) and low temperature (-30 to -40°C). This paper considers the value of replacing R404A by R410A in refrigeration fields, to reduce refrigerant charges, mainly in centralized plants (direct expansion with distributed refrigerant) The charge reduction is around 40%, mainly due to much smaller mass and volume flow (gas and liquid). Due to smaller volume flow, the use of smaller tubes and more compact exchangers like microchannels will drive further charge reductions. It should also be noted that, due to better GWP for R410A, combined with the large charge reduction, the direct warming impact is reduced by close to 70%. For some time now, R410A is being used to replace R407C and R404A, in small and medium water chillers, HVAC units and heat pumps. One of the reasons could be the charge reduction.

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Details

  • Original title: Use of HFC-410A in refrigeration plants to reduce refrigerant charge.
  • Record ID : 2009-1452
  • Languages: English
  • Subject: Environment, General information
  • Source: RCR 2009. 1st IIR Workshop on Refrigerant Charge Reduction in Refrigerating Systems.
  • Publication date: 2009/04/06

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