VACUUM INSULATING PANEL

Theoretical aspects and practical possibilities for realization of a n ew type of thermal insulation, vacuum panel insulation (VPI), are give n. From a functional point of view, it is a flat all metal Dewar flask with an array of supporting beads. They span metal foils at desired d istances and limit conduction by internal, near-point contacts. Model studies and first reports show that it can be more energy efficient an d environmentally acceptable than mineral or glass wools and blown (CF C) foams, widely used today. Three main contributions to heat transfer are compared: radiation, conductivity of supports and envelope as wel l as of the residual atmosphere. Some results of our VPI sample prepar ation and processing are given.