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The modified theory of the bi-calorimeter with the dimidiated metallic core is described. Between two blocks of the core a sample of material (solid or gas) is placed and the heating of only one block begins. The temperature of the blocks in function of time is recorded. From the obtained data it is possible to calculate the temperature difference between the blocks and the heat flux running through the sample. Using the Fourier's law the thermal conductivity of the sample material is calculated. The partition of electrical power between the heated and the passive block was independent of temperature. By the application of a thin air layer which separates the block and the sample material, the undefined contact resistance is eliminated.
Czasopismo
Rocznik
Tom
Strony
3--20
Opis fizyczny
Wz., wykr.,Bibliogr. 11 poz.,
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autor
Bibliografia
- [1] OSIPOWA W. A.: Thermal measurements, Izd. ENERGIA, Moskva 1969 (in Russian).
- [2] DULNEV G. N.: The theory of thermal regular regime and its application to the determination of thermal characteristics, Int. J. of Heat Mass Transfer, 1, 1960, 152-160.
- [3] KONDRATJEW G. M.: Thermal Regular Regime, Gosizdat, Moskva 1954 (in Russian).
- [4] CARSLAW H. S. AND JAEGER J. C.: Conduction of Heat in Solids, Oxford 1959, 350.
- [5] MIKHAILOV M. D. AND OZISIK M. N.: Unified Analysis and Solutions of Heat and Mass Diffusion, John Wiley and Sons 1984.
- [6] WILCZEWSKI T., LEWANDOWSK1 W, M., KUBSKI P., BIESZK H., SZYMAŃSKI S., BUZUK M. AND DYMKOWSKA J.: The way of estimation of the heating curves slope in dynamic methods, Proc. of 9th Heat and Mass Transfer Symposium, Augustów 1995, Com. of Thermodynamics and Combustion, PAS Poland, II, 433-440, (in Polish).
- [7] WILCZEWSKI T., LEWANDOWSKI W. M., KUBSKI P., BIESZK H., BUZUK M. AND SZYMAŃSKI S.: The dynamic method of determination of the heat transfer conductivity coefficient in non-steady states, XV Conf. Com. Chemical Engineering and Processing, PAS Gdańsk, Poland, 1995, 129-132.
- [8] NEKHENDZI E. J.: Method of a regular regime for the determination of variable thermal coefficients, Int. J. Heat Mass Tranfer, 35, 1961, 311-320.
- [9] ADAMSKI S.: Investigations of the thermal conductivity coefficient in the air chamber with natural convection aspects, Master’s Thesis, Gdańsk University of Technology, Gdańsk, Poland 2001 (in Polish).
- [10] FODEMSKI T. R.: (Ed.), Heat Measurements, WNT, Warszawa 2001 (in Polish).
- [11] GOGÓŁ W.: Measurements of thermal conductivity, Scientific Notes of Łódź University (Zeszyty Naukowe Politechniki Łódzkiej), Nr 606, Zeszyt 101, Łódź 1991 (in Polish).
Typ dokumentu
Bibliografia
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bwmeta1.element.baztech-article-BGPK-1546-5941