An investigation of heat transfer coefficient during refrigerants condensation in vertical pipe microchannel

• Autorzy: Bohdal T. , Kruzel M. , Sikora M.
• Języki publikacji: EN

Abstrakty

EN

This article presents the results of experimental research of R404A, R407C and R410A high-pressure refrigerants condensation in vertical pipe microchannels with an internal diameter dw below 1 mm. The study determined the local and average heat transfer coefficient in the full range of vapor quality, x = 1-0. On the basis of experimental investigations, the dependence of heat transfer coefficient on the vapor quality x, the mass flux density G and the channel internal diameter dw was obtained.

Słowa kluczowe

EN

heat transfer coefficient; pressure drop; heat flux density; microchannel; vapor quality

PL

współczynnik przenikania ciepła; spadek ciśnienia; gęstość strumienia ciepła; mikrokanał; stopień suchości

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2017
• Tom: Vol. 1, No 2
• Strony: 163--169
• Opis fizyczny: Bibliogr. 13 poz., rys., wykr.

Twórcy

autor

Bohdal T.

• Faculty of Mechanical Engineering, Department of Energetics, Koszalin University of Technology, Raclawicka 15-17, 75-620, Koszalin, Poland

autor

Kruzel M.

• Faculty of Mechanical Engineering, Department of Energetics, Koszalin University of Technology, Raclawicka 15-17, 75-620, Koszalin, Poland

autor

Sikora M.

• Faculty of Mechanical Engineering, Department of Energetics, Koszalin University of Technology, Raclawicka 15-17, 75-620, Koszalin, Poland

Bibliografia

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• 3. Kruzel M. (2012). Impact of variable facility performance to the production costs formation. Materials of the 9th Conference of Students and Young Workers of the Faculty of Mechanical Engineering and the 5th National Conference of Students of Scientific Colleges of Technical Universities, Koszalin University of Technology, pp. 95-104. (in Polish)
• 4. Fronk M. B., Garimella S. (2016). Condensation of carbon dioxide in microchannels. International Journal of Heat and Mass Transfer, Vol. 100, pp. 150-164.
• 5. Garimella S., Agarwal A., Fronk B.M. (2016). The Intermittent and annular flow condensation continuum: pressure drops at the microscale. International Journal of Multiphase Flow, Vol. 84, pp. 129-144.
• 6. Agarwal A., Bandhauer T.M., Garimella S. (2010). Measurement and modeling of condensation heat transfer in non-circular microchannels. International Journal of Refrigeration, Vol. 33, No. 6, pp. 1169-1179.
• 7. Dobson M.K., Chato J.C. (1998). Condensation in smooth horizontal tubes. Journal of Heat Transfer, Vol.120, No. 1, pp. 193-213.
• 8. Wang W.-W., Radcliff T.D., Christensen R.N. (2002). Acondensation heat transfer correlation for millimeter-scale tubing with flow regime transition, Experimental Thermal and Fluid Science, Vol. 26, No. 5, pp. 473-485.
• 9. Traviss D.P., Rohsenow W.M., Baron A.B. (1973). Forced-convection condensation inside tubes: a heat transfer equation for condenser design, ASHRAE Trans., Vol. 79, Part 1, pp. 157-165.
• 10. Kim S.M., Mudawar I. (2012). Universal approach to predicting two-phase frictional pressure drop for adiabatic and condensing mini/micro-channels flows. International Journal of Heat and Mass Transfer, Vol.55, No. 11-12, pp. 3246-3261.
• 11. Shah M.M. (1979) A general correlation for heat transfer during film condensation inside pipes. International Journal of Heat and Mass Transfer, Vol. 22, pp. 547-556.
• 12. Friedel, L. (1979). Improved friction pressure drop correlation for horizontal and vertical two phase flow.3R International, Vol. 18, No. 7, pp. 485-491.
• 13. Mikielewicz D., Wajs J., Andrzejczyk M., Klugmann M. (2016). Pressure drop of HFE7000 and HFE7100 during flow condensation in minichannels. International Journal of Refrigeration, Vol.68, pp. 226-241.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).