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Abstract
Evacuated powder insulation systems have long been known to exceed the thermal performance of existing commercially available insulators, such as fiber glass and CFC-blown foam. Evacuated powder panel insulation consists of ultra-fine particle powders encapsulated at a low pressure in a thin, low conductivity gas permeation barrier. The powder provides a rigid support structure. The outstanding thermal performance is achieved by drastically reducing the effective thermal conductivity of the powder. This is accomplished by evacuating the powder support system, thereby minimizing the conductive heat transfer through the gas trapped in the void spaces between individual powder particles. The present study investigates the feasibility of a composite panel: a series of individually evacuated panels encapsulated in a rigid closed cell foam matrix. The panels were encapsulated in a thin glass sheet barrier to preserve the vacuum.
Evacuated powder insulation systems have long been known to exceed the thermal performance of existing commercially available insulators, such as fiber glass and CFC-blown foam. Evacuated powder panel insulation consists of ultra-fine particle powders encapsulated at a low pressure in a thin, low conductivity gas permeation barrier. The powder provides a rigid support structure. The outstanding thermal performance is achieved by drastically reducing the effective thermal conductivity of the powder. This is accomplished by evacuating the powder support system, thereby minimizing the conductive heat transfer through the gas trapped in the void spaces between individual powder particles. The present study investigates the feasibility of a composite panel: a series of individually evacuated panels encapsulated in a rigid closed cell foam matrix. The panels were encapsulated in a thin glass sheet barrier to preserve the vacuum.
Date
11/1995
11/1995
Author(s)
L Glicksman; N Solomou; J Hong
L Glicksman; N Solomou; J Hong
Page(s)
27-52
27-52
Source
Oak Ridge National Lab
Oak Ridge National Lab
Keyword(s)
rigid foam; perlite; thermal insulation;
rigid foam; perlite; thermal insulation;