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A non-flammable, reduced GWP, HFC-134a replacement in centrifugal chillers: DR-11.

Author(s) : KONTOMARIS K., LECK T. J., HUGHES J.

Summary

Air conditioning in large buildings is often provided by centrifugal chillers using HFC-134a. Efforts to mitigate climate change are motivating the identification of HFC replacements with low GWPs. HFO-1234yf, with a GWP(100)= 4, has been found promising as an HFC-134a replacement in centrifugal chillers (Kontomaris et al., 2010). However, HFO-1234yf is marginally (ASHRAE 2L) flammable. A new non-flammable developmental refrigerant, DR-11, with a GWP(100) lower than 600, was evaluated as an HFC-134a replacement in centrifugal chillers. Given the minimal refrigerant emissions from chillers and its higher predicted energy efficiency, DR-11 could enable solutions with comparable or even lower total global warming impact than HFO-1234yf despite its higher GWP. Moreover, the higher predicted DR-11 refrigeration capacity and the lack of DR-11 flammability may allow more cost-effective solutions than HFO-1234yf that can be adopted without any delays for safety code revisions. Flexible climate change regulations would allow acceptance of refrigerants with optimum performance, flammability and GWP trade-offs.

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Details

  • Original title: A non-flammable, reduced GWP, HFC-134a replacement in centrifugal chillers: DR-11.
  • Record ID : 2010-2002
  • Languages: English
  • Publication date: 2010/07/12
  • Source: Source: Proc. 2010 int. Refrig. Air Cond. Conf., Purdue Univ.
    n. 2142; 8 p.; fig.; tabl.; 10 ref.

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