Some problems of 'thickness effect curve' measurements in the determination of heat conductivity of semitransparent media using thin plate samples

• Autorzy: Koniorczyk P.
• Języki publikacji: EN

Abstrakty

EN

The present paper is devoted to an analytical analysis of the problems of the 'thickness effect curve' measurements in semitransparent media in which the influence of thickness on the thermal conductivity is observed [1-5]. The method of division of dependence of the thermal conductivity on the thickness z (for the sample thickness l) into three layers of different width (two layers of them are of the same width) is used for the simplified analytical calculations of heat transfer in such media.

Słowa kluczowe

EN

radiative-conductive heat transfer; reduction of thermal conductivity

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2004
• Tom: Vol. 25, no. 1
• Strony: 73--82
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Koniorczyk P.

• Military University of Technology, ul. Kaliskiego 2, 00-908 Warsaw, Poland,

Bibliografia

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• [3] PÖLTZ H. AND JUGEL R.: The thermal conductivity of liquids - IV, Int. J. Heat Mass Transfer, 10, Pergamon Press, 1967.
• [4] ANDRE S. AND DEGIOVANNI A.: A theoretical study of the transient coupled con duction and radiation heat transfer in glass: phonic diffusivity measurements by the flash technique, Int. J. Heat Mass Transfer, 38, Pergamon Press, 1995.
• [5] BOOTH J. R. AND GRIMES J. T.: The determination of radiation k-factor for foam structures using HFM apparatus, Proc. of 'Thermal Conductivity 22' Conference, Technomic Publishing Company, Inc, USA, 1994.
• [6] KONIORCZYK P.: Experimental research and analysis of coupled conduction radiation heat transfer in block polymerized polyamide 6, J. of Tech. Phys., 36, 3, 1995.
• [7] KONIORCZYK P.: Reduction of thermal conductivity in small thickness samples of some selected synthetic materials. The influence of a temperature difference on the thermal conductivity of those materials, J. of Tech. Physics, 36, 4, 1997.
• [8] KONIORCZYK P.: Modelling and numerical analysis of the phenomenon of reduction in the thermal conductivity in small thickness samples of some selected synthetic materials, J. of Tech. Physics, 39, 1, 1998.
• [9] KONIORCZYK P.: The Rosseland theory of diffusion radiation as applied to the study of the phenomenon of reduction in thermal conductivity, J. of Tech. Physics, 40, 2, 1999
• [10] WISNIEWSKI S.: Technical Thermodynamics, WNT, Warsaw 1980, 265-273 (in Polish).
• [11] THE R. P., SPINNEY S. C.: Thermal conductivity of concrete: measurement probe- lems and effect of moisture, I.I.F.-I.I.R.-Commission B1
• [12] KUBICAR L., BOHÁC V.: Contact constriction and free surface effects in pulse tran method, Proc. of the Meeting of the Thermophysical Washington 1972-2. Society Working Group of the Slovak Physical Society THERMOPHYSICS 2002, by Constantine the Philosopher University in Nitra, 2001, 27-35. Ed. Libor Vozar, Issued
• [13] ZAPOTOCZNA-SYTEK G., ZMYWACZYK J., KONIORCZYK P.: Thickness effect curve in autoclaved aerated concrete, Proc. 16 European Conf. on Thermophysical Properties, 2002, Imperial College, London, 1-18 (CD-ROM).