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Global warming impact of low GWP chiller refrigerants.

Number: pap. ID: 597

Author(s) : KONTOMARIS K.

Summary

This paper compares the global warming impacts of large tonnage chillers for three low GWP refrigerant candidates based on Hydro-Fluoro-Olefins and the incumbent refrigerants they intend to replace. HFO-1234yf and XP10 are potential replacements for HFC-134a. Developmental refrigerant DR-2 is a potential replacement for HCFC-123. Four representative scenarios were examined defined according to the levels of electricity carbon intensity and refrigerant emissions. Under all scenarios, DR-2 would enable the lowest warming impact and electricity consumption among refrigerants not subject to phase-out. When a midpressure refrigerant is required to meet chiller size restrictions, HFO-1234yf and XP10 would enable warming impact reductions relative to HFC-134a, except in the case of simultaneously high electricity carbon intensity and low refrigerant emissions. HFO-1234yf would enable modestly or significantly lower warming impacts per chiller than XP10. XP10, however, could be adopted earlier and more widely than HFO-1234yf because XP10 could replace HFC-134a in existing chillers without extensive equipment and no safety code modifications. Moreover, XP10 consumes less electricity than HFO-1234yf to deliver a target cooling rate. Case studies are presented where the lowest warming impact is not necessarily achieved with the refrigerant with the lowest GWP, but one having a more advantageous combination of GWP and energy efficiency.

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Pages: 8 p.

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Details

  • Original title: Global warming impact of low GWP chiller refrigerants.
  • Record ID : 30002214
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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