The thermal resistance of flat powder-filled evacuated panels
The need to develop high thermal resistance insulations that do not use chlorofluorocarbons has resulted in renewed interest in evacuated powder-filled panel insulations. Evacuated panels containing small diameter milled perlite or silica particles have been studied using a linear heat flow measurement technique. Thermal resistivities (R-value for one-inch of thickness) as high as 19.3 ft/sup 2//center dot/h/center dot//degree/F/Btu-in. have been observed for silica panels. Thermal measurements completed for a commercially produced evacuated panel containing perlite have shown thermal resistivities from 9.0 to 18.1 ft/sup 2//center dot/h/center dot//degree/F/Btu-in. Thermal resistance measurements have been repeated to determine changes in thermal performance with time (aging). 8 refs., 7 figs., 3 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6157020
- Report Number(s):
- CONF-890273-1; ON: DE89008243
- Resource Relation:
- Conference: 5. international conference on thermal insulation, San Francisco, CA, USA, 27 Feb 1989; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
POWDERS
R FACTORS
ENERGY CONSERVATION
HEAT FLOW
PARTICLES
PERLITE
SILICA
THERMAL INSULATION
CHALCOGENIDES
IGNEOUS ROCKS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
ROCKS
SILICON COMPOUNDS
SILICON OXIDES
VOLCANIC ROCKS
320107* - Energy Conservation
Consumption
& Utilization- Building Systems- (1987-)