| Autor: |
Wilkes, Kenneth E., Gabbard, W. Alex, Weaver, Fred J., Booth, J. Richard |
| Předmět: |
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| Zdroj: |
Journal of Cellular Plastics; Sep/Oct2001, Vol. 37 Issue 5, p400, 29p |
| Abstrakt: |
Laboratory data are presented on the effect of constant-temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC141b and with three of its potential replacements—HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90°F, 40°F, and -10°F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels containing foam enclosed between solid plastic sheets, and thin slices of core foam cut from similar panels. Results are presented for the first two years of a multi-year aging study. Preliminary comparisons of measured data with predictions of a mathematical aging model are presented. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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