Abstract
Chlorofluorocarbons (CFCs) are important components of refrigeration equipment, plastic for insulation for buildings and appliances, and solvent cleaning processes. The Montreal Protocol to Protect Stratospheric Ozone Layer and recent revisions to the protocol require a rapid phase-out of the production and use of CFCs and a transition to alternative materials and technologies. It is important that the alternative technologies selected do not exacerbate the global warming problem while attempting to preserve stratospheric ozone. A study was conducted to evaluate the total global warming impact of proposed alternatives to SFCs and this paper focuses on the aspects of that study relevant to refrigeration and air-conditiong. The concept of total equivalent warming impact (TEWI) is developed as a measure of the combined global warming impacts of the refrigirant losses to the atmosphere and the CO 2 emissions from fossil fuels to generate power to run the refrigeration and air-conditioning systems. Equipment using alternatives to CFCs has lower TEWIs than current systems in almost all cases, with dramatic reductions possible in some applications.
Published Version
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