Investigations on flow boiling heat transfer in minichannels

• Autorzy: Piasecka M.
• Języki publikacji: EN

Abstrakty

EN

The experimental investigations cover heat transfer of refrigerants R-123 and R-ll flowing through vertical miniehannels of 40 nun wide rectangular section and depths of 1, 1.5 and 2 mni. The heating foil, supplied with controlled direct current, constitutes one of the surfaces of the asymmetrically heated minichannel. The liquid crystal thermography technique is applied in order to measure the two-dimensional temperature field of the heating surface. The investigations focus on the transition from single phase forced convection to nucleate boiling, i.e. in the zone of boiling incipience. The work aims to examine and analyze how the selected parameters (inlet pressure, inlet liquid subcoofing, liquid flow velocity) affect nucleate boiling incipience for various geometry (changeable depth) of the minichannel. Furthermore, the investigations are intended to develop a correlation for the calculations of the Nusselt number under the conditions of boiling incipience in the minichanni:! as a function of changeable parameters in the investigations.

Słowa kluczowe

EN

minichannel; boiling; heat transfer

PL

minikanał; wrzenie; transport ciepła

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Turbulence : international journal
• Rocznik: 2004
• Tom: Vol. 10
• Strony: 111--122
• Opis fizyczny: Bibliogr. 14 poz.

Twórcy

autor

Piasecka M.

• Kielce University of Technology, Chair of Thermodynamic and Fluid Mechanics, al. Tysiąclecia Panstwa Polskiego 7, PL - 25-314 Kielce

Bibliografia

• 1. Piasecka M., Theoretical and experimental investigations into flow boiling heat transfer in a narrow channel, Ph.D. thesis, Dept. Mechanical Engineering, Kielce University of Technology, Kielce 2002 (in Polish).
• 2. Piasecka M., Poniewski M.E., Flow boiling incipience of subcooled Freon 123 in narrow rectangular channel, Proc. 3rd Int. Conf. on Transport Phenomena in Multiphase Systems, Baranow Sandomierski 2002, 419-424.
• 3. Piasecka M., Poniewski M.E., The onset of refrigerant R-123 flow boiling in a narrow vertical channel, Archives of Thermodynamics 2003, 24, 19-35.
• 4. Piasecka M., Poniewski M.E., Hysteresis phenomena at the onset of subcooled nucleate flow boiling in microchannels, ASME, Proc. 1st Int. Conf. on Microchannels and Minichannels, Rochester 2003, 581-588.
• 5. Piasecka M., Poniewski M.E., Hysteresis phenomena at the onset of subcooled nucleate flow boiling in microchannels, Heat Transfer Eng. J. 2004, 25, 3, 44-51.
• 6. Piasecka M., Hozejowska S., Poniewski M.E., Experimental evaluation of flow boiling incipience of subcooled fluid in a narrow channel, Proc. 5th Int. Conf. on Boiling Heat Transfer, Montego Bay 2003, 18.
• 7. Piasecka M., Hozejowska S., Poniewski M.E., Experimental evaluation of flow boiling incipience of subcooled fluid in a narrow channel, Int. J. Heat and Fluid Flow 2004, 25, 159-172.
• 8. Piasecka M., Poniewski M.E., Theoretical and experimental analysis of flow boiling heat transfer in minichannel, Proc. 5th Minsk Int. Seminar-Heat Pipes, Heat Pumps, Refrigerators, Minsk 2003, 228-247.
• 9. Piasecka M., Poniewski M.E., Influence of selected parameters on boiling heat transfer in minichannels, ASME, Proc. 2nd Int. Conf. on Microchannels and Minichannels, Rochester 2004, 515-522.
• 10. Piasecka M., Poniewski M.E., Flow boiling incipience in minichannels, Proc. 3rd Int. Symp. on Two-phase Flow Modelling and Experimentation, Pisa 2004 (in print).
• 11. Bilicki Z., The relation between the experiment and theory for nucleate forced boiling, Proc. 4th World Conf. on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, Brussels 1997, 2, 571-578.
• 12. Bohdal T., Development of bubbly boiling in channel flow, Experimental Heat Transfer 2001, 14, 3, 199-215.
• 13. Piasecka M., Hozejowska S., Poniewski M.E., Determination of local flow boiling heat transfer coefficient in narrow channel, Archives of Thermodynamics 2003, 24, 55-67.
• 14. Hozejowski L., Hozejowska S., Piasecka M., Application of harmonic polynomials as complete solutions of Laplace equation in an inverse heat conduction problem, PAMM, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 2003, 2, 1, 362-363.