Determination of local flow boiling heat transfer coefficient in narrow channel

• Autorzy: Piasecka M. , Poniewski M. , Hożejowska S.
• Języki publikacji: EN

Abstrakty

EN

In the paper two models of heat transfer through the main parts of the test section with a narrow channel, were proposed and discussed: one- and two-dimensional. The area of interest was the issue of heat transfer into refrigerant 123 flowing through a narrow vertical channel of 1 mm height with one wall heated uniformly and others approximately adiabatic. Experimental investigations dealt with forced convection and particular attention was paid to boiling incipience conditions and hysteresis phenomena. Thermosensivite liquid crystals were used for measuring the two-dimensional temperature distribution on the heating surface. An inverse problem was dealt with as, on the basis of temperature measurement on external side of the heating and the measurement of the electric power supplied to the heater, it is possible to determine local heat transfer coefficients on the surface: the heating foil - the boiling fluid flowing along the narrow channel. The resultant local heat transfer coefficients obtained for two models were compared.

Słowa kluczowe

EN

flow boiling; heat transfer; incipience of boiling; inverse problem

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2003
• Tom: Vol. 24, no. 2
• Strony: 55--67
• Opis fizyczny: Bibliogr. 6 poz.,

Twórcy

autor

Piasecka M.

• Politechnika Świętokrzyska, Kielce

autor

Poniewski M.

• Politechnika Świętokrzyska, Kielce

autor

Hożejowska S.

• Politechnika Świętokrzyska, Kielce

Bibliografia

• [1] PIASECKA M: Theoretical and Experimental Investigations into Flow Boiling Heat Transfer in a Narrow Channel, Ph.D. Thesis, Dept. of Mechanical Engineering, Kielce University of Technology, Kielce 2002, (in Polish).
• [2] PIASECKA M., PONIEWSKI M. E.: The onset of refrigerant R-123 flow boiling in a narrow vertical channel, Archives of Thermodynamics, Vol. 24(2003), No. 2, 19-36.
• [3] PIASECKA M., HOŻEJOWSKA S., PONIEWSKI M. E.: Experimental evaluation of flow boiling incipience of subcooled fluid in a narrow channel, submitted for publication in Proc. of 5th Int. Conf. on Boiling Heat Transfer, 04-08.05.2003, Montego Bay, Jamaica.
• [4] CHIN Y.: An Experimental Study on Flow Boiling in Narrow Channel: from Convection to Nucleate Boiling, Ph.D. Thesis, Univ. of Houston, Dept. Mech. Eng. 1997.
• [5] COLLATZ L.: Numerical Methods of Solving Differential Equations, PWN Warszawa, 1960 (in Polish).
• [6] PIASECKA M., PONIEWSKI M. E.: Hysteresis phenomena at the onset of subcooled nucleate flow boiling in microchannels, submitted for publication in Proc. of 1st Int. Conf. on Microchannels and Minichannels, 24-25.04.2003, Rochester, NY, USA.