Modeling the instabilities of the condensation process of the R134a and 404A refrigerants in pipe minichannels in the conditions of periodic hydrodynamic disturbances

• Autorzy: Kuczyński W. , Denis A.
• Języki publikacji: EN

Abstrakty

EN

In the present paper, an attempt was made to model the periodic hydrodynamic instabilities of the condensation process of a refrigerant in pipe minichannels. For this purpose, a homogenous thermodynamic model with an equilibrium condition on both sides was used, which was based on the equations of the balance of the mass, momentum and energy. These equations were used for numerical modeling of flow disturbances with a phase change. This model takes into account the complexity of multiphase flows. The accuracy of the model calculations was verified by means of the experimental results obtained. A satisfactory compliance was found for this comparison, which confirms the usefulness of the computational model proposed for the determination of the influence of periodically generated hydrodynamic disturbances on the condensation process of R134a and R404A refrigerants in pipe minichannels.

Słowa kluczowe

EN

condensation; minichannels; modeling of instabilities

PL

kondensacja; minikanały; modelowanie niestabilności

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2017
• Tom: Vol. 1, No 2
• Strony: 179--187
• Opis fizyczny: Bibliogr. 21 poz., rys., wykr.

Twórcy

autor

Kuczyński W.

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

autor

Denis A.

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

Bibliografia

• 1. Ardron K.H., Duffey R.B. (1977). Acoustic wave propagation in a flowing liquid-vapor mixture. Int. J. Multiphase Flow, Vol. 4, pp. 303-322.
• 2. Bilicki Z., Downar-Zapolski P. (1992). Wave phenomena in two-liquid and homogenous two-phase flow models. Trans. IFFM, Vol. 94, pp. 19-42.
• 3. Bohdal T., Kuczyński W. (2005). Investigation of boiling of refrigeration medium under periodic disturbance conditions. Int. J. of Experimental Heat Transfer, Vol.18 , No. 3, pp. 135-151.
• 4. Bohdal T., Kuczyński W. (2011). Boiling of R404A Refrigeration Medium Under the Conditions of Periodically Generated Disturbances. Heat Transfer Engineering, Vol. 32 , No. 5, pp. 359-368.
• 5. Celmerowski A. (2008). Modeling and simulation of physical systems Matlab/Simulink. Publishing House of the Bialistok University of Technology. Bialistok. (in Polish)
• 6. Comakli O., Karsli S., Yilmaz M. (2002). Experimental investigation of two phase flow instabilities in a horizontal in-tube boiling system. E. Conv. and Management, No. 43, pp. 249-268.
• 7. Kacprowski J. (1960). Outline of Electroacoustics. Communications Publishing Houses. Issue II, Warsaw. (in Polish)
• 8. Kakac S., Bon B. (2008). A review of two-phase flow dynamic instabilities in tube boiling systems, Int. J. of Heat and Mass Transfer, Vol.51, No. 3-4, pp. 399-433.
• 9. Kuczyński W., Charun H., Bohdal T. (2012). Influence of hydrodynamic instability on the heat transfer coefficient during condensation of R134a and R404A refrigerants in pipe minichannels. International Journal of Heat and Mass Transfer, Vol. 55, pp. 1083-1094.
• 10. Nakoryakov V.E., Pokusaev B.G., Pribaturin N.A., Shreiber I.R. (1988). The wave dynamics in vapor liquid medium. Int. J. of Multiphase Flow, Vol. 14, No. 6, pp. 655-671.
• 11. Ramshaw J.D., Trapp J.A. (1978). Characterisyics, stability and short-wavelenght phenomena in two-phase flow equation systems. Nuc. Sci. and Engineering, Vol. 66, pp. 378-396.
• 12. Tian Ch., Dou Ch., Yang X., Li X. (2005). Instability of automotive air conditioning system with a variable displacement compressor. Part 1. Experimental investigation. Int. J. Refrigeration, Vol. 28, pp. 1102-1110.
• 13. Tarnowski W. (2004). Modeling of systems. Publishing House of the Koszalin University of Technology, Koszalin. (in Polish)
• 14. Tarnowski W. (2001). Simulation and Optimalization in MATLAB. Publishing of the WSM Gdynia, Gdynia. (in Polish)
• 15. Kuczyński W. (2013) Modeling of the propagation of a pressure wave during the condensation process of R134a refrigerant in a pipe minichannel under the periodic conditions of hydrodynamic disturbances, International Journal of Heat and Mass Transfer, Vol.56, pp. 715-723.
• 16. Kuczyński W. (2013). Characterization of pressure-wave propagation during the condensation of R404A and R134a refrigerants in pipe mini-channels that undergo periodic hydrodynamic disturbances. International Journal of Heat and Fluid Flow, Vol. 40, pp. 135-150.
• 17. Kartaschoff P. (1985). Frequency and Time. Publishing Houses of Communications, Warsaw. (in Polish)
• 18. Tian Ch., Dou Ch., Yang X., Li X. (2005). Instability of automotive air conditioning system with a variable displacement compressor. Part 2. Experimental investigation. Int. J. Refrigeration, Vol. 28, pp. 1111-1123.
• 19. Xu J., Chen T. (2000). Acoustic wave prediction in flowing steam-water two-phase mixture. Int. J. of Heat and Mass Transfer, Vol. 43, pp. 1079-1088.
• 20. Zauderer E. (1983). Partial differential equation of applied mathematics. Wiley, New York.
• 21. Zhang T., Wen J., Peles Y., Catano J., Zhou R., Jensen M. (2011). Two-phase refrigeration flow instability analysis and active control in transient electronics cooling systems. Int. J. of Multiphase Flow, Vol. 37, pp. 84-97.

Uwagi

PL

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