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Главная Архив Оргкомитет Будущие конференции AIHTC
International Heat Transfer Conference 7

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

THE LAPLACE TRANSFORM METHOD FOR MEASURING SIMULTANEOUSLY THERMAL DIFFUSIVITY AND THERMAL CONDUCTIVITY OF FLAT PLATE MATERIALS

Yoshihiro Iida
Department of Materials Science and Chemical Engineering Yokohama National University, Hodogaya, Yokohama, 240, Japan

H. Shigeta
Department of Chemical Engineering, Yokohama National University, Hodogaya, Yokohama 230 Japan

M. Umemoto
Department of Chemical Engineering, Yokohama National University, Hodogaya, Yokohama 230 Japan

M. Kawai
Department of Chemical Engineering, Yokohama National University, Hodogaya, Yokohama 230 Japan

DOI: 10.1615/IHTC7.2760
pages 527-532

Аннотация

A new technique for measuring simultaneously the thermal diffusivity and thermal conductivity of a flat plate sample is presented. A test sample is inserted between a pair of reference samples and a one dimentional heat flow having an arbitrary function is applied from outside of them. The thermal properties are determined from the equations derived from the Laplace transform of the heat conduction and Fourier equations and the Laplace integral values of the temperature responses at four measuring positions. Numerical tests are performed to check the validity of the method and to examine its characteristics. The method is demonstrated by the measurement of both properties of teflon, silicone rubber and soda glass plate. An automatic data analyzer, which is composed of A/D converter, microcomputer and other necessary components, is made on an experimental basis.

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