Performance of Evaporation Heat Transfer Enhancement and Pressure Drop for Liquid Nitrogen

- Journal title : Transactions of the Korean Society of Mechanical Engineers B
- Volume 24, Issue 3, 2000, pp.363-372
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-B.2000.24.3.363

Title & Authors

Performance of Evaporation Heat Transfer Enhancement and Pressure Drop for Liquid Nitrogen

Nam, Sang-Chul; Lee, Sang-Chun; Park, Byung-Duck;

Nam, Sang-Chul; Lee, Sang-Chun; Park, Byung-Duck;

Abstract

An experiment was carried out to evaluate the heat transfer enhancement and the pressure drop characteristics for liquid nitrogen using wire-coil-insert technique under horizontal two-phase conditions. The tube inner diameters were 8 mm and 15 mm, respectively and the tube length was 4.7 m. The helix angle of the wire coil insert was and its length was 4.7 m. Heat transfer coefficients for both the plain and the enhanced test tubes were calculated from the measurements of temperatures, flow rates and pressure drops. A correlation in a power-law relationship of the Nusselt number, Reynolds number and Prandtl number for the heat transfer was proposed which can be available for design of cryogenic heat exchangers. The correlation showed that heat transfer coefficients for the wire-coil inserts were much higher than those for plain tubes, increased by more than times depending upon the range of the equivalent Reynolds number. The correlation was compared with other various correlations in the turbulent flow conditions.

Keywords

Cryogenic Fluid;Cryogenic Heat Exchanger;Wire Coil Inserts;Volumetric Hydraulic Diameter;

Language

Korean

Cited by

References

1.

Randall F. Barron, 1985, Cryogenic system, 2nd edition, Oxford University Press, New Yark, p. 3

2.

宮田嘉明, 安部光一, 1996, LNG:液化から冷熱利用まで,' 日本冷凍協會誌, Vol. 71, No. 819, pp. 3-9

3.

宮田嘉明, 1993, '天然ガス時代のLNG技術,' 日本機械學會誌, Vol. 96, No. 901, pp. 13 -19

4.

Clark, John A., 1968, 'Cryogenic Heat Transfer,' Advances in Heat Transfer, Vol. 5, pp. 325-517

5.

Chen, J. C., 1966 'Correlations of Boiling Heat Transfer to Saturated Fluids in Convective Flow,' Ind. Eng. Chem. Proc. Des. Div., Vol. 5, pp. 322

6.

Zuber, N. and Fried, E., 1961, 'Two-Phase Flow and Boiling Heat Transfer to Cryogenic Liquids,' Combustion and Liquid Rocket Conf, April 1961, Miami, Florida

7.

Kekjiro Mori, Kazumi Kasahara & Uuji Shiota, 1986, 'A Study on Steam-Heating LNG Vaporizers,' 三井造船技報, 第124號, Vol. 37-43

8.

三浦俊泰, 1994, 'LNG冷熟利用汚泥リサイクル設備,' NKK技報, No. 147, pp. 20-21

9.

한승탁, 김종보, 1994, '직접 접촉식 액화천연 가스기화기의 특성에 관한 연구,' 대한기계학회논문집, Vol. 19, No.4, pp. 903-911

10.

Bergles, A. E., Ninnalan, V., Junkan, G. H. and Webb, R. L., 1983, 'Bibliography on Augmentation of Convective Heat and Mass Transfer II,' Heat Transfer Laboratory Report HTL-31, ISU-ERI-Ames-84221, Jowa State Univ., December

11.

Sethumadhavan, R. & Rao, M. R, 1983, 'Turbulent Flow Heat Transfer and Fluid Friction in Helical-Wire-Coil-Inserted Tubes,' Int. J. Heat Mass Transfer, Vol. 26 No. 12, pp. 1833 -1845

12.

Webb, Ralph L., 1994, Principles of Enhanced Heat Transfer, Wiley & Sons, Inc. pp: 1-30

13.

ASHRAE, 1994, ASHRAE Handbook of Fundamentals, New York, pp. 20.5-20.7

14.

Cavallini, A. & Zecchin, R., 1974, 'A Dimensionless Correlation for the Heat Transfer in Forced Convection Condensation,' Proc. 5th Int. Heat Transfer Conf, Tokyo, Vol. 3, pp. 309-313

15.

Webb, Ralph L., 1994, Principles of Enhanced Heat Transfer, Wiley & Sons, Inc. pp. 188 - 191

16.

John. G. Coller, 1972, Convective Boiling and Condensation, Second Ed., McGraw-Hill, UK, pp. 39-41

17.

Sieder, E. N. and G. E. Tate, 1936, 'Heat Transfer and Pressure Drop of Liquids in Tubes,' Ind. Eng. Chern., Vol. 28 : pp. 1429-1435

18.

Kummar, R. & Judd, R. L., 1970, 'Heat Transfer with Coiled Wire Turbulence Promoters,' Canadian Journal of Chemical Engineering, Vol. 48, pp. 378-383