Method of testing the heat insulation action of bodies especiall

Details Method of testing the heat insulation action of bodies especiall Method of testing the heat insulation action of bodies especiall

1995-03-14

1997-04-22

Gutierrez, Diego F. F.

Thermal measuring and testing

Thermal testing of a nonthermal quantity

374 44, G01N 2500, G01N 2518

Patent

active

056224303

ABSTRACT:
A method of testing heat insulation shaped bodies for purposes of evaluation wherein a shaped heat insulation body is placed in a measuring space where the initial temperature of the heat insulation body is measured under ambient conditions prior to heating. The shaped heat insulation body is then subjected to thermal radiation for contactless heating for a sufficient period of time to heat the body to an elevated temperature. Then the radiation is removed and the initial temperature decrease of the body is measured with contactless temperature measurement to obtain a temperature/time profile. The thermal conduction coefficient .vertline.k.vertline. is calculated as follows: ##EQU1## and compared with a standard thermal conduction coefficient, wherein (t) is time, .theta..sub.o is the temperature the surface of said body after heating, .theta..sub.u is the temperature of the surroundings, and .theta.(t) is the surface temperature at the time (t).

REFERENCES:
patent: 4246785 (1981-01-01), Sellers et al.
patent: 4630938 (1986-12-01), Piorkowska et al.
patent: 5248198 (1993-09-01), Droege
Vlasov, V. et al., "Automatic Determination of the Thermal Diffusivity of Heat Insulators," J. Eng. Physics, vol. 11, No. 3 (Sep. 1966).
Taylor, R., "Construction of Apparatus for Heat Pulse Thermal Diffusivity Measurements from 300-3000K," J. Phys. E: Sci. Instrum., vol. 13, No. 11 (Nov. 1980).

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