[KSCI] Korea Science Citation Index Service

Heat Transfer Correlation during Gas-Cooling Process of Carbon Dioxide in a Horizontal Tube

Kang Byung-Ha (School of Mechanical and Automative Engineering, Kookmin University)
Choi Yi-Cheol (Graduate School, Kookmin University)
Kim Suk-Hyun (School of Mechanical and Automative Engineering, Kookmin University)

Publication Information

International Journal of Air-Conditioning and Refrigeration / v.14, no.1, 2006 , pp. 19-27 More about this Journal

Abstract

The characteristics of heat transfer and pressure drop have been investigated experimentally during gas-cooling process of carbon dioxide. The results of this study are useful information in the design of a heat exchanger of $CO_2$ refrigerator. The test section consists of 6 series of copper tube, 4.15 and 2.18mm ID, respectively. The inlet temperature, the operating pressure, and the mass flux are varied in the range of $80{\sim}120^{\circ}C,\;{7\sim}10MPa,\;and\;400{\sim}1,900kg/m^2s$ , respectively. The heat transfer coefficient of $CO_2$ is affected by temperature, inlet pressure, and mass flux of $CO_2$ . At the maximum HTC, the temperature of $CO_2$ nearly accords with the psuedocritical temperature. It is found that the pressure drop is substantially affected by mass flux and inlet pressure of $CO_2$ . The results have been compared with those of previous work. The heat transfer correlation at the gas-cooling process has been also suggested which predicts within the error of 20%.

Keywords

Carbon dioxide; Correlation; Gas-cooling; Heat transfer; Pressure drop;

Citations & Related Records

Reference

1	Hwang, Y. and Radermacher, R., 1999, Experimental investigation of the $CO_2$ refrigeration cycle, ASHRAE Trans., Vol.105, Part 1, Paper No. CH-99-22-2
2	Petrov, N.E. and Popov, V. N., 1985, Heat transfer and resistance of carbon dioxide be-ing cooled in the supercritical region, Thermal Engineering, Vol. 32, No.3, pp. 131-134
3	Olsen, D. A., 2000, Heat transfer of supercritical carbon dioxide flowing in a cooled horizontal tube, Preliminary Proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue, July 25-28, USA, pp. 251-258
4	Hwang, Y. and Radermacher, R., 1998, Theoretical of carbon dioxide refrigeration cycle, Int. J. HV AC&R Research, Vol4, No.3, pp, 245-263 DOI ScienceOn
5	Yin, J. M., Bullard, C. W. and Hrnjak, P. S., 2000, Design strategies for R744 gas cooler, Preliminary Proceedings of the 4th IIRGustav Lorentzen Conference on Natural Working Fluids at Purdue, July 25-28, USA, pp.315-322
6	Incropera, F. P. and DeWitt, D. P., 1990, Introduction to Heat Transfer, 2nd ed., John Wiley & Sons, New York, pp. 455-460
7	Fang, X., Bullard, C.W.and Hrnjak, P.S., 2001, Modeling and analysis of gas coolers, ASHRAE Trans., Vol. 107, Part 1. Paper-No, 4411
8	Yoon, S. H., 2002, Studies on the characteristics of evaporation and supercritical gas cooling heat transfer of carbon dioxide, Ph. D. Thesis, Seoul National University, Seoul, Korea
9	Krasnoshchekov, E. A., Kuraeva, I. V. and Protopopov, V. S., 1970, Local heat transfer of carbon dioxide atsupercritical pressure under cooling conditions, High Temperature Institute (Translated from Teplofizika Vysokikh Temperatur), Vol. 7, No.5, pp.856-862
10	Pitla, S. S., Groll, E. A. and Ramadhyani, S., 2001, Convective heat transfer from in-tube cooling of turbulent supercritical carbon dioxide: Part 2-Experimental data and numerical predictions, Int. J. HV AC&R Research, Vol. 7; No.4, pp.367-382 DOI ScienceOn