Thermal Conductivities of Alternatives to CFC-11 for Foam Insulation

Published

April 1, 2001

Author(s)

Richard A. Perkins, L -. Cusco, J -. Howley, Arno R. Laesecke, S -. Matthes, M L. Ramires

Abstract

The present work examines the thermal conductivities of several dilute vapors which are potential alternatives to chlorofluorocarbons (CFCs) for cellular-plastic foams. Thermal conductivity data are reported in the vapor phase, from 280 to 340 K, for trichlorofluoromethane (CFC-11) 1,1,1-trifluoro-2,2-dichloroethane (HCFC-123), 1-fluoro-1,1-dichloroethane (HCFC-14lb), 1,1,2-trifluoroethane (HFC-143), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), 1,1,1,2,3,3-hexafluoropropane (HFC-236ea), 1,1,1,3,3,3-hexafluoropropane (HFC-236fa), 1,1,2,2,3-pentafluoropropane (HFC-245ca), 2-(difluoromethoxy)-1,1,1-trifluoroethane (HFE-245fal), 2-(trifluoromethoxy)-1,1,1-trifluoroethane (HFE-263fb1), octafluorocyclobutane (RC318), 1,1,1-trifluoroacetone, and a 75 mol % cyclopentane + 25 mol % pentane mixture. These data were obtained with a transient hot-wire instrument and are estimated to have an uncertainty of 2% (2ς confidence) at these low densities.

Citation

Journal of Chemical and Engineering Data

Volume

46

Issue

No. 2

Pub Type

Journals

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Keywords

alternative refrigerant, CFC-11, cyclopentane, dilute gas, foam blowing, HCFC-123, HCFC-141b, HFC-143, HFC-227ea

Citation

Perkins, R. , Cusco, L. , Howley, J. , Laesecke, A. , Matthes, S. and Ramires, M. (2001), Thermal Conductivities of Alternatives to CFC-11 for Foam Insulation, Journal of Chemical and Engineering Data, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=831744 (Accessed December 4, 2024)