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TECHNICAL NOTES

Evaporation Heat Transfer and Pressure Drop in Horizontal Tubes With Strip-Type Inserts Using Refrigerant 600a

[+] Author and Article Information
S.-S. Hsieh, K.-J. Jang

Department of Mechanical Engineering

Y.-C. Tsai

Department of Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan 80424, R.O. China

J. Heat Transfer 122(2), 387-391 (Dec 20, 1999) (5 pages) doi:10.1115/1.521489 History: Received July 08, 1999; Revised December 20, 1999
Copyright © 2000 by ASME
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References

Collier, J. G., 1981, Convective Boiling and Condensation, 2nd ed., McGraw-Hill, New York.
Schlager,  L. M., Pate,  M. B., and Bergles,  A. E., 1990, “Evaporation and Condensation Heat Transfer and Pressure Drop in Horizontal, 12.7 mm Micro-fin Tubes with Refrigerant 22,” ASME J. Heat Transfer,, 112, pp. 1041–1045.
Singh,  A., Ohadi,  M. M., and Dessiatoun,  E., 1991, “Flow Boiling Heat Transfer Coefficients of R-134a in a Microfin Tube,” ASME J. Heat Transfer, 118, pp. 497–499.
Liu,  X., 1997, “Condensing and Evaporating Heat Transfer and Pressure Drop Characteristics of HFC-134a and HCFC-22,” ASME J. Heat Transfer, 119, pp. 158–163.
Hsieh,  S.-S., Jang,  K.-J., and Huang,  M.-T., 1999, “Evaporative Heat Transfer and Enhancement Performance of Serpentine Tube With Strip-Type Inserts Using Refrigerant-134a,” ASME J. Heat Transfer, 121, pp. 752–757.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mech. Eng., 75, Jan., pp. 3–8.
Wen,  M.-Y., and Hsieh,  S.-S., 1994, “Evaporative Heat Transfer and Enhancement Performance of Rib-Roughened Tube Annuli With Refrigerant 114,” Int. J. Heat Mass Transf., 37, pp. 425–436.
Wambsganss,  M. W., France,  D. M., Jendrzejczyk,  J. A., and Tran,  T. N., 1993, “Boiling Heat Transfer in a Horizontal Small-Diameter Tube,” ASME J. Heat Transfer, 115, pp. 963–972.
Gnielinski,  V., 1976, “New Equations for Heat and Mass Transfer in Turbulent Pipe and Channel Flow,” Int. Chem. Eng., 16, pp. 359–368.
Petukhov, B. S., 1970, “Heat Transfer and Friction in Turbulent Pipe Flow With Variable Properties,” Advances in Heat Transfer, Vol. 6, J. P. Hartnett and T. F. Irvine, Jr., eds., Academic Press, New York, pp. 503–564.
Taitel,  Y., and Dukler,  A. E., 1976, “A Model for Predicting Flow Regime Transitions in Horizontal and Near Horizontal Gas-Liquid Flow,” AIChE J., 22, pp. 47–55.
Reid,  R. S., Pate,  M. B., and Bergles,  A. E., 1991, “A Comparison of Augmentation Techniques During in-Tube Evaporation of R-114,” ASME J. Heat Transfer, 113, pp. 451–458.

Figures

Grahic Jump Location
The geometry of the inserts in present study
Grahic Jump Location
Flow pattern map for test tubes
Grahic Jump Location
Local heat transfer enhancement factor for tubes with inserts at q=9.1 kW/m2 and q=31.2 kW/m2
Grahic Jump Location
dP/dz versus x for different test tubes in present study under (a) adiabatic condition (b) heated condition
Grahic Jump Location
f (two-phase friction factor) versus x for different test tubes

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