Comparative study of heat transfer and pressure drop during flow boiling and flow condensation in minichannels

Open access


In the paper a method developed earlier by authors is applied to calculations of pressure drop and heat transfer coefficient for flow boiling and also flow condensation for some recent data collected from literature for such fluids as R404a, R600a, R290, R32,R134a, R1234yf and other. The modification of interface shear stresses between flow boiling and flow condensation in annular flow structure are considered through incorporation of the so called blowing parameter. The shear stress between vapor phase and liquid phase is generally a function of nonisothermal effects. The mechanism of modification of shear stresses at the vapor-liquid interface has been presented in detail. In case of annular flow it contributes to thickening and thinning of the liquid film, which corresponds to condensation and boiling respectively. There is also a different influence of heat flux on the modification of shear stress in the bubbly flow structure, where it affects bubble nucleation. In that case the effect of applied heat flux is considered. As a result a modified form of the two-phase flow multiplier is obtained, in which the nonadiabatic effect is clearly pronounced.

[1] Mikielewicz J: Semi-empirical method of determining the heat transfer coefficient for subcooled saturated boiling in a channels. Int. J. Heat Transfer, 17(1973), 1129-1134.

[2] Mikielewicz D., Mikielewicz J., Tesmar J.: Improved semi-empirical method for determination of heat transfer coefficient in flow boiling in conventional and small diameter tubes. Int. J. Heat Mass Trans. 50(2007), 3949-3956.

[3] Mikielewicz D., Mikielewicz J.: A common method for calculation of flow boil- ing and flow condensation heat transfer coefficients in minichannels with account of nonadiabatic effects. Heat Tr. Engng. 32(2011), 1173-1181.

[4] Bohdal T., Charun H., Sikora M.: Comparative investigations of the conden- sation of R134a and R404A refrigerants in pipe minichannels. Int. J. Heat Mass Trans. Issue 9-10, 2011, 1963-1974.

[5] Cavallini A., Censi G., Del Col D., Doretti L., Longo G.A., Rossetto L.: Condensation of Halogenated Refrigerants inside Smooth Tubes. HVAC and Res., 8(2002), 429-451.

[6] Matkovic M., Cavallini A., Del Col D., Rossetto L.: Experimental study on condensation heat transfer inside a single circular minichannel. Int. J. Heat Mass Trans. 52(2009), 2311-2323.

[7] Lu M-C, Tong J-R, Wang C-C.: Investigation of the two-phase convective boiling of HFO-1234yfin a 3.9 mm diameter tube Int. J. Heat Mass Trans. 65(2013), 545-551.

[8] Wang S., Gong M.Q., Chen G.F., Sun Z.H., Wu J.F.: Two-phase heat transfer and pressure drop of propane during saturated flow boiling inside a horizontal tube. Int. J. Refrigeration (2013).

[9] Thome J.R., El Hajal J., Cavallini A.: Condensation in horizontal tubes. Part 2: New heat transfer model based on flow regimes. Int. J. Heat Mass Trans. 46(2003), 3365-3387.

[10] Sun L., Mishima K.: Evaluation analysis of prediction methods for two-phase flow pressure drop in mini-channels. Int. J. Multiphase Flows 35(2009), 47-54.

[11] Zhang M., Webb R.L.: Correlation of two-phase friction for refrigerants in small- diameter tubes. Exp. Therm. Fluid Sci. 25(2001), 3-4, 131-139.

[12] Müller-Steinhagen R.,Heck K.: A simple friction pressure drop correlation for two-phase flow in pipes. Chem. Eng. Progress 20(1986), 297-308.

[13] Tran T.N., Chyu M.-C., Wambsganss M.W. France D.M.: Two-phase pres- sure drop of refrigerants during flow boiling in small channels: an experimental investigation and correlation development. Int. J. Multiphase Flow 26(2000), 11, 1739-1754.

[14] Mikielewicz J.: Influence of phase changes on shear stresses at the interfaces. Trans. IFFM, 76(1978), 31-39 (in Polish).

[15] Kutateładze S.S., Leontiev A.I.: Turbulent Boundary Layers in Compressible Gases. Academic Press, NY 1964.

[16] Wallis G.B.: One Dimensional Two-Phase Flow. McGraw-Hill, 1969.

[17] Copetti J.B., Macagnan M.H., Zinani F., Kunsler N.L.F.: Flow boiling heat transfer and pressure drop of R-134a in a mini tube: an experimental investigation. Exp. Therm. Fluid Sci. 35(2011), 636-644.

[18] Cooper M.G.: Saturation nucleate pool boiling: a simple correlation. Int. Chem. Eng. Symposium 1, 86(184), 785-793

Archives of Thermodynamics

The Journal of Committee on Thermodynamics and Combustion of Polish Academy of Sciences

Journal Information

CiteScore 2016: 0.54

SCImago Journal Rank (SJR) 2016: 0.319
Source Normalized Impact per Paper (SNIP) 2016: 0.598

Cited By


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 252 242 15
PDF Downloads 76 73 2