Aging of polyurethane insulation foamed with second- and third-generation blowing agents

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Description

Results are presented on two studies of the effect of aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators. Both studies are cooperative projects between the Oak Ridge National Laboratory and the Appliance Research Consortium. The first study has been ongoing for four years and involves evaluation of second generation blowing agents: HCFC-141b and HCFC-142/22 blend with CFC-11 for comparison. The second study has recently started and involves third generation blowing agents: HFC-134a, HFC-245fa. and cyclopentane with HCFC-141b for comparison. Both studies consist of periodic thermal measurements on panels made with solid steel and/or plastic skins and ... continued below

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19 p.

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Wilkes, K. E.; Gabbard, W. A. & Weaver, F. J. May 1998.

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Description

Results are presented on two studies of the effect of aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators. Both studies are cooperative projects between the Oak Ridge National Laboratory and the Appliance Research Consortium. The first study has been ongoing for four years and involves evaluation of second generation blowing agents: HCFC-141b and HCFC-142/22 blend with CFC-11 for comparison. The second study has recently started and involves third generation blowing agents: HFC-134a, HFC-245fa. and cyclopentane with HCFC-141b for comparison. Both studies consist of periodic thermal measurements on panels made with solid steel and/or plastic skins and a core of foam to simulate refrigerator walls, and measurements on thin slices with cut faces to characterize the core foam. Laboratory data are presented on four years of aging of panels containing second generation blowing agents. Preliminary data are presented for the third generation blowing agents. The data on panels are compared with predictions of computer models of foam aging.

Physical Description

19 p.

Notes

OSTI as DE98004290

Source

  • International appliance technical conference, Columbus, OH (United States), 4-6 May 1998

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  • Other: DE98004290
  • Report No.: ORNL/CP--95971
  • Report No.: CONF-980523--
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/290940 | External Link
  • Office of Scientific & Technical Information Report Number: 645477
  • Archival Resource Key: ark:/67531/metadc694466

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  • May 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 12, 2015, 6:16 p.m.

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Wilkes, K. E.; Gabbard, W. A. & Weaver, F. J. Aging of polyurethane insulation foamed with second- and third-generation blowing agents, article, May 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc694466/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.