**Publish at : ** 01 Jan 2016

**IJtech :** IJtech
Vol 7, No 2 (2016)

**DOI :** https://doi.org/10.14716/ijtech.v7i2.2980

Novianto, S., Pamitran, A.S., Koestoer, R., Kosasih, E.A., Alhamid, M.I., 2016. Void Fraction of Flow Boiling with Propane in Circular Horizontal Tube. *International Journal of Technology*. Volume 7(2), pp.235-243

187

Sentot Novianto | Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia |

Agus S. Pamitran | Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia |

Raldi Koestoer | Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia |

Engkos A. Kosasih | |

Muhammad Idrus Alhamid |

Abstract

An investigation into flow boiling void fraction was conducted to observe its characteristics and to develop a new correlation of void fraction based on the separated model. The study used a natural refrigerant of R-290, flowed in a horizontal tube of 7.6 mm inner diameter under experimental conditions of 3.7 to 9.6oC saturation temperature, 10 to 25 kW/m2 heat flux, and 185 to 445 kg/m2s mass flux. The void fraction, calculated by the present experimental data, was used for comparison with 31 existing correlations, including model types as follows: homogeneous, slip ratio, K?h correlation, drift flux, and a model based on the Lockhart-Martinelli correlation (Xtt). A new void fraction correlation, as a function of liquid and vapor Reynolds numbers, was proposed, based on the data. The measured pressure drop was compared with some pressure drop correlations that use the newly developed void fraction combination. The best prediction was shown by the homogeneous model.

Void fraction, Pressure drop, Two-phase flow, Boiling, Propane

References

Armand, A.A., 1946. Resistance to Two-phase Flow in Horizontal Tubes. Izv. VTI, Volume 15(1), pp. 16–23

Bestion, D., 1990. The Physical Closure Laws in the CATHARE Code. Nuclear Engineering and Design, Volume 124(3), pp. 229–245

Chen, J.J.J., Spedding, P.L., 1981. An Extension of the Lockhart-Martinelli Theory of Two-phase Pressure Drop and Holdup. International Journal of Multiphase Flow, Volume 7(6), pp. 659–675

Chisholm, D., 1983. Two-phase Flow in Pipelines and Heat Exchangers. George Godwin, London

Dix, G.E., 1971. Vapor Void Fractions for Forced Convection with Subcooled Boiling at Low Flow Rates. University of California, Berkeley

Domanski, P., Didion, D., 1983. Computer Modeling of the Vapor Compression Cycle with Constant Flow Area Expansion Device. Final Report, National Bureau of Standards, National Engineering Lab. 1, Washington DC

El Hajal, J., Thome, J.R., Cavallini, A., 2003. Condensation in Horizontal Tubes, Part 1: Two-phase Flow Pattern Map. International Journal of Heat and Mass Transfer, Volume 46(18), pp. 3349–3363

Fang, X., Xu, Y., Su, X., Shi, R., 2012. Pressure Drop and Friction Factor Correlations of Supercritical Flow. Nuclear Engineering and Design, Volume 242, pp. 323–330

Fauske, H., 1961. Critical Two-phase Steam-water Flows. In: the Proceedings of 1961 Heat Transfer Fluid Mechanical Institute, Stanford University Press, California, pp. 79–89

Gregory, G.A., Scott, D.S., 1969. Correlation of Liquid Slug Velocity and Frequency in Horizontal Cocurrent Gas?liquid Slug Flow. AIChE Journal, Volume 15(6), pp. 933–935

Guzhov, A.I., Mamayev, V.A., Odishariya, G.E., 1967. A Study of Transportation in Gas-liquid Systems. Gases, International Gas Union, Committee on Natural Storage Mass

Harms, T.M., Li, D., Groll, E.A., Braun, J.E., 2003. A Void Fraction Model for Annular Flow in Horizontal Tubes. International Journal of Heat and Mass Transfer, Volume 46(21), pp. 4051–4057

Lockhart, R.W., Martinelli, R.C., 1949. Proposed Correlation of Data for Isothermal Two-phase, Two-component Flow in Pipes. Chemichal Engineering Progress, Volume 45(1), pp. 39–48

Lorentzen, G., 1995. The Use of Natural Refrigerants: A Complete Solution to the CFC/HCFC Predicament. International Journal of Refrigeration, Volume 18(3), pp. 190–197

Massena, W.A., 1960. Steam-water Pressure Drop and Critical Discharge Flow: A Digital Computer Program. General Electric Co., Hanford Atomic Products Operation, Richland, Wash.

Mishima, K., Hibiki, T., 1996. Some Characteristics of Air-water Two-phase Flow in Small Diameter Vertical Tubes. International Journal of Multiphase Flow, Volume 22(4), pp. 703–712

Morooka, S., Ishizuka, T., Iizuka, M., Yoshimura, K., 1989. Experimental Study on Void Fraction in a Simulated BWR Fuel Assembly (Evaluation of Cross-sectional Averaged Void Fraction). Nuclear Engineering and Design,

Volume 114(1), pp. 91–98

Nicklin, D.J., Wilkes, J.O., Davidson, J.F., 1962. Two-phase Flow in Vertical Tubes. Trans. Inst. Chem. Eng., Volume 40(1), pp. 61–68

Nishino, H., Yamazaki, Y., 1963. A New Method of Evaluating Steam Volume Fractions in Boiling Systems. Nippon Genshiryoku Gakkaishi (Japan), Volume 5, pp 39–46

Pamitran, A.S., Choi, K-I., Oh, JT., Hrnjak, P., 2010. Characteristics of Two-phase Flow Pattern Transitions and Pressure Drop of Five Refrigerants in Horizontal Circular Small Tubes. International Journal of Refrigeration, Volume 33(3), pp. 578–588

Pearson, K.G., Cooper, C.A., Jowitt, D., 1984. The THETIS 80% Blocked Cluster Experiment, Part 5: Level Swell Experiments. AEEW-R1767

Petalaz, N., Aziz, K., 1997. A Mechanistic Model for Stabilized Multiphase Flow in Pipes. Technical Report for Members of the Reservoir Simulation Industrial Affiliates Program (SUPRI-B) and Horizontal Well Industrial Affiliates Program (SUPRI-HW), Stanford University, California

Rouhani, S.Z., Axelsson, E., 1970. Calculation of Void Volume Fraction in the Subcooled and Quality Boiling Regions. International Journal of Heat and Mass Transfer, Volume 13(2), pp. 383–393

Steiner, D., 1993. Heat Transfer to Boiling Saturated Liquids. Verein Deutscher Ingenieure, VDI-Geseelschaft Verfahrenstechnik und Chemieingenieurswesen GCV, Düsseldorf

Sun, K.H., Duffey, R.B., Peng, C.M., 1980. A Thermal-hydraulic Analysis of Core Uncovery. In: the Proceedings of the 19th National Heat Transfer Conference, Experimental and Analytical Modeling of LWR Safety Experiments

Tandon, T.N., Varma, H.K., Gupta, C.P., 1985. A Void Fraction Model for Annular Two-phase Flow. International Journal of Heat and Mass Transfer, Volume 28(1), pp. 191–198

Thom, J.R.S., 1964. Prediction of Pressure Drop during Forced Circulation Boiling of Water. International Journal of Heat and Mass Transfer, Volume 7(7), pp. 709–724

Turner, J.M., Wallis, G.B., 1965. The Separate-cylinders Model of Two-phase Flow. Paper no. NYO-3114-6, Thayer's School Eng., Dartmouth College, Hanover, NH, USA

Wallis, G.B., 1969. One-Dimensional Two-phase Flow. McGraw-Hill Inc., New York

Xu, Y., Fang, X., 2014. Correlations of Void Fraction for Two-phase Refrigerant Flow in Pipes. Applied Thermal Engineering, Volume 64(1), pp. 242–251

Yashar, D.A., Wilson, M.J., Kopke, H.R., Graham, D.M., Chato, J.C., Newell, T.A., 2001. An Investigation of Refrigerant Void Fraction in Horizontal, Microfin Tubes. HVAC&R Research, Volume 7(1), pp. 67–82

Zivi, S.M., 1964. Estimation of Steady-state Steam Void-fraction by Means of the Principle of Minimum Entropy Production. Journal of Heat Transfer, Volume 86(2), pp. 247–251