Refrigerants today are often thousands of times more polluting than carbon dioxide (CO 2 ). 1 Ozone Depletion Potential, UNEP (2006). Linde strongly advocates the use of refrigerant gases with zero ozone depletion potential and fully supports the phase out of HCFC’s. With minor modifications to system design, it is anticipated that new equipment making use of these new refrigerant alternatives will achieve increased performance.It should be stressed that GWP is not and should not be the only metric to evaluate a refrigerant’s environmental impact. These next-generation refrigerants and their blends are typically either non-flammable (ASHRAE safety classification 1) or have lower flammability (ASHRAE safety classification A2L).In an effort to determine the impact of new lower GWP alternative refrigerants on systems, the industry and various research organizations have been investigating the performance of these refrigerants in HVAC&R systems and components. However, many HFC refrigerants have relatively high global warming potentials. New equipment can be designed for optimal energy performance using new alternative refrigerants, while incorporating the additional safety features necessary to use A2L and A3 refrigerants. Global Warming Potential, or GWP, is a measure of how destructive a climate pollutant is. Note that with the exception of carbon dioxide, all of these existing alternatives are either mildly flammable (ASHRAE safety classification 2L for ammonia and R32) or have higher flammability (ASHRAE safety classification 3 for propane and isobutane). The GWP of a gas refers to the total contribution to global warming resulting from the emission of one unit of that gas relative to one unit of the reference gas, CO 2, which is assigned a value of 1. Global Warming Potential Values The following table includes the 100-year time horizon global warming potentials (GWP) relative to CO2. One small 30-lb tank holds the equivalent of the COEnsuring exceptionally leak-tight systems and near-perfect reclamation, or changing course to safer alternatives in refrigeration systems, are two options for addressing the risk to the climate posed by high-GWP refrigerants.
The AR5 values are the most recent, but the second assessment report (1995) and fourth In addition, national and international efforts to phase-down the global use of these and other high-GWP refrigerants may affect future price and availability. Since existing systems using HFC refrigerants are not specifically designed to use flammable refrigerants, retrofit is limited to A1 alternatives. It is hoped these efforts will impact the market within the next several years.Wonderful post.
range, for example, from 2 up to about 14,000. Thanks for the useful post.See the latest technology that is defining a new standard in medical grade refrigeration.
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global warming potential of refrigerants