NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Thermophysical Property Need for the Environmentally-Acceptable Halocarbon Refrigerants.


pdf icon Thermophysical Property Need for the Environmentally-Acceptable Halocarbon Refrigerants. (6308 K)
McLinden, M. O.; Didion, D. A.

Thermophysical Properties, 10th Symposium. Proceedings. June 20-23, 1988, Gaithersburg, MD, 1988.

Keywords:

refrigerants; halocarbons; chlorofluorcarbon; thermodynamic properties; thermophysical properties; fluids; transport properties; flammability; environmental effects; chlorine; hydrogen

Abstract:

The need for, and uses of thermodynamic and transport properties in the selection of working fluids for the vapor compression cycle and in equipment design are reviewed. Lists of hydrogen-containing halocarbons, as well as their mixtures, are presented as alternatives to the environmentally-harmful, fully-halogenated chlorofluorocarbons. These fluids range from well-characterized, widely-available refrigerants to materials available only by custom synthesis about which very little is known. Data priorities for these fluids are presented; most essential are critical point, vapor pressure, liquid density, ideal gas heat capacity, and vapor p-V-T data. A critical need exists for these data on a number of candidate working fluids in order not to lose the opportunity to select the best set of future refrigerants.