The thermal resistance of flat powder-filled evacuated panels

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6157020

Graves, R S; Yarbrough, D W; McElroy, D L

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
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320107* -- Energy Conservation
Consumption
& Utilization-- Building Systems-- (1987-)
CHALCOGENIDES
ENERGY CONSERVATION
HEAT FLOW
IGNEOUS ROCKS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PERLITE
POWDERS
R FACTORS
ROCKS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
THERMAL INSULATION
VOLCANIC ROCKS