JOURNAL BROWSE
Search
Advanced SearchSearch Tips
An Experimental Study on Tube-Side Heat Transfer Coefficients and Friction Factors of the Enhanced Tubes Used in Regenerators of Absorption Chillers
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
An Experimental Study on Tube-Side Heat Transfer Coefficients and Friction Factors of the Enhanced Tubes Used in Regenerators of Absorption Chillers
Kim, Nea-Hyun;
  PDF(new window)
 Abstract
Enhanced tubes are used widely in the heat exchangers of absorption chillers. In regenerators, corrugated, ribbed or floral tubes are commonly used. In this study, the tube-side heat transfer coefficients and friction factors of enhanced tubes were obtained experimentally using the Wilson Plot method. The results showed that the heat transfer coefficients and the friction factors were the largest for the corrugated tube, followed by the ribbed tube. The heat transfer coefficients and friction factors of the floral tube matched those of the smooth tube within 4%, which suggests that the heat transfer and friction characteristics of the floral tube may be accounted for properly by the hydraulic diameter. The B(e+) and g(e+) were obtained from the experimental data of the corrugated and ribbed tube. The B(e+) and g(e+) of the corrugated tube matched those of the existing correlation within 20%. The present results may be used for an assessment of the heat transfer and friction characteristics of the enhanced tubes for regenerators.
 Keywords
Enhance Tube;Heat Transfer Coefficient;Friction Factor;Regenerator;
 Language
Korean
 Cited by
 References
1.
Webb, R. L. and Kim, N.-H., Principles of Enhanced Heat Transfer, 2nd Ed., Taylor and Francis Pub., 2005.

2.
Yoon, J. I., Oh, H. K., and Kashiwagi, T., “Characteristics of heat and mass transfer for a falling film type absorber with insert spring tubes,” Trans. of the KSME(B), Vol. 19, No. 6, pp. 1501-1509, 1995.

3.
Kawamata, O., Otani, T., Ishitulia, N., and Aliyanchi, T., "Development of high performance heat transfer tubes for absorber of absorption refrigerator," Hitachi Corporation, Vol. 8, pp. 57-62, 1985.

4.
Furukawa, M., Sasaki, N., Kaneko, T., and Nosetani, T., "Enhanced heat transfer tubes for absorber of absorption chiller/heater," Trans. of the JAR, Vol. 10, No. 2, pp. 219-226, 1993. DOI: http://doi.org/10.11322/tjsrae.10.219 crossref(new window)

5.
Yoon, J. I., Kwon, O. K., and Moon, C. G., “Experimental investigation of heat and mass transfer on absorber with several enhanced tubes,” KSME International Journal, Vol. 13, No. 9, pp. 640-646, 1999.

6.
An, F.-L. and Kim, N.-H., “Pool boiling performance of LiBr solution on low-fin tubes,” J. Enhanced Heat Transfer, Vol. 21, No. 4-5, pp. 307-321, 2014. DOI: http://dx.doi.org/10.1615/JEnhHeatTransf.2015013111 crossref(new window)

7.
Nikuradse, J., "Laws of flow in rough pipes," VDI Forshungsheft, NACA TM-1292, 1933.

8.
Dipprey, D. F. and Sabersky, R. H., "Heat and momentum transfer in smooth and rough tubes at Various Prandtl numbers," Int. J. Heat Mass Trans., Vol. 6, pp. 329-353, 1963. DOI: http://dx.doi.org/10.1016/0017-9310(63)90097-8 crossref(new window)

9.
Webb, R. L., Eckert, E. R. G. and Goldstein, R. J., "Heat transfer and friction in tubes with repeated rib roughness," Int. J. Heat Mass Trans., Vol. 14, 601-617, 1971. DOI: http://dx.doi.org/10.1016/0017-9310(71)90009-3 crossref(new window)

10.
Webb, R. L., Narayanamurthy, R. and Thors, P., "Heat transfer and friction characteristics of internal helical rib roughness," J. Heat Transfer, Vol. 122, pp. 134-142, 2000. DOI: http://dx.doi.org/10.1115/1.521444 crossref(new window)

11.
Mehta, M. H. and Raja Rao, M., "Analysis and correlation for turbulent flow heat transfer and friction coefficients in spirally corrugated tubes for steam condenser application," Proc. Nat'l Heat Trans. Conf., HTD-96, Vol. 3, pp. 307-312, 1988.

12.
Wilson, E. E., "A basis of rational design of heat-transfer apparatus," Trans. ASME, Vol. 37, pp. 47-70, 1915.

13.
Kline, S. J. and McClintock, F. A., "The description of uncertainties in single sample experiments," Mechanical Engineering, Vol. 75, pp. 3-9, 1953.

14.
Prandtl, L., Essentials of Fluid Dynamics, Blackie and Son Pub., London, 1969.

15.
Dittus, F. W. and Boelter, L. M. K., "Heat transfer in automobile radiators of the tubular type," Univ. Calif. Pub. Eng., Vol 2, pp. 443-461, 1930.