To obtain a copy of a specific publication, users should contact the publication's publisher directly.
Abstract
Advanced insulation technologies are being developed in order to meet incresing stringent minimum efficiency standards for appliances and building envelopes. Numerous advanced insulation concepts have been developed to the stage that fullscale prototypes and, in some cases, commercial products are available. These concepts include powder, aerogel, foam, glass fiber filled evacuated panels, and low conductivity as based systems, some of which are operated at a vacuum whereas others are operated at atmospheric pressure. These emerging insulation technologies offer the potential for extremely high thermal resistance values. NIST has undertaken a research program to develop thermal measurement techniques for advanced insulation panels. This paper describes the design of a calorimetric apparatus, compares the results to measurements made using a heat flow meter apparatus for homogenous materials, and describes the procedure used to determine the thermal resistance of an advanced insulation panel. Finite-element modelling results are presented which show the effect of varoius physical parameters on the overall thermal resistance of a metal clad powder filled vacuum insulation system.
Advanced insulation technologies are being developed in order to meet incresing stringent minimum efficiency standards for appliances and building envelopes. Numerous advanced insulation concepts have been developed to the stage that fullscale prototypes and, in some cases, commercial products are available. These concepts include powder, aerogel, foam, glass fiber filled evacuated panels, and low conductivity as based systems, some of which are operated at a vacuum whereas others are operated at atmospheric pressure. These emerging insulation technologies offer the potential for extremely high thermal resistance values. NIST has undertaken a research program to develop thermal measurement techniques for advanced insulation panels. This paper describes the design of a calorimetric apparatus, compares the results to measurements made using a heat flow meter apparatus for homogenous materials, and describes the procedure used to determine the thermal resistance of an advanced insulation panel. Finite-element modelling results are presented which show the effect of varoius physical parameters on the overall thermal resistance of a metal clad powder filled vacuum insulation system.
Date
11/1995
11/1995
Author(s)
A Fanney; C Saunders; S Hill
A Fanney; C Saunders; S Hill
Page(s)
149-161
149-161
Source
Oak Ridge National Lab
Oak Ridge National Lab
Keyword(s)
thermal resistance; insulation panel; superinsulation; energy efficient; thermal measurement; calorimetric; heat flow meter;
thermal resistance; insulation panel; superinsulation; energy efficient; thermal measurement; calorimetric; heat flow meter;