Total energy warming impact (TEWI): An approach to evaluate the overall greenhouse warming potential of cleaning systems
- Buffalo Research Lab., NY (United States)
In order to evaluate and compare the overall greenhouse warming of application-specific, alternative CFC solvent cleaning systems including not in kind options, it is necessary to consider both the direct and the indirect contributions which are due, respectively, to the emission of the solvent vapor, and to the CO{sub 2} emissions resulting from the energy required to operate the system over its normal lifetime. The Total Energy Warming Impact (TEWI) is defined as the sum of these factors. In a joint industry/government effort co-funded by the Alternative Fluorocarbons Acceptability Study (AFEAS) and the U.S. Department of Energy (DOE), this study has been carried with solvent cleaning systems, as well as for refrigeration, air conditioning and foam blowing applications. Cleaning options considered include organic solvents such as hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), chlorinated and oxygenated hydrocarbons, aqueous and semi-aqueous systems; and {open_quotes}no clean{close_quotes} technologies. Along with the TEWI, other factors to consider when choosing an alternative CFC solvent system include: cleaning efficiency worker safety, toxicity, operating costs, investment, floor space, energy efficiency, reliability; and environmental issues such as discharge to sewers and waterways, and air quality.
- OSTI ID:
- 214906
- Report Number(s):
- CONF-950801-; TRN: 96:000922-0391
- Resource Relation:
- Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
- Country of Publication:
- United States
- Language:
- English
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