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Test Procedures for Advanced Insulation Panels.


pdf icon Test Procedures for Advanced Insulation Panels. (495 K)
Fanney, A. H.; Saunders, C. A.; Hill, S. D.

Alliance for Responsible Atmospheric Policy; U.S. Environmental Protection Agency; Environment Canada and United National Environmental Program. International CFC and Halon Alternatives Conference, 1994. Stratospheric Ozone Protection for the 90's. October 24-26, 1994, Washington, DC, 1994 AND National Institute of Building Sciences/Building Environment and Thermal Envelope Council. Super Insulations and the Building Envelope. Proceedings. November 14, 1995, Washington, DC, 149-161 pp, 1995, 1994.

Keywords:

halons; ozone; thermal measurement; calorimeters; heat flow; thermal resistance; metal cladding; powder filling; insulation systems

Abstract:

Advanced insulation technologies are being developed in order to meet increasing stringent minimum efficiency standards for appliances and building envelopes. Numerous advanced insulation concepts have been developed to the stage that full-scale prototypes and, in some cases, commercial products are available. These concepts include powder, aerogel, foam, glass fiber filled evacuated panels, and low conductivity gas 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. The National Institute of Standards and Technology (NIST) has undertaken a research program to develop thermal measurement techniques appropriate for advanced insulation panels. This paper describes the design of a calorimetric apparatus, compares the calorimetric 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 various physical parameters on the overall thermal resistance of a metal-clad powder-filled vacuum insulation system.