Browse > Article

An Experimental Study on Heat Transfer and Pressure Drop Characteristics during Supercritical Process of Carbon Dioxide in a Horizontal Tube  

최이철 (국민대학교 대학원)
강병하 (국민대학교 기계ㆍ자동차공학)
김석현 (국민대학교 기계ㆍ자동차공학부)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.16, no.5, 2004 , pp. 414-420 More about this Journal
Abstract
The heat transfer and pressure drop characteristics associated with the gas cooling of the supercritical carbon dioxide in a horizontal tube have been investigated experimentally. This problem is of particular interest in the design of a gas cooler of cooling systems using $CO_2$refrigerant. The test section is consisted of 6 series of 455 mm in length, 4.15 mm ID copper tube, respectively. The effects of the inlet temperature, pressure and mass flow rate on the heat transfer and pressure drop of $CO_2$in a horizontal tube is studied in detail. The heat transfer coefficient of $CO_2$is varied by temperature, inlet pressure, and mass flow rate of $CO_2$. This has maximum value at near the pseudocritical temperature. The pressure drop is changed by inlet pressure and mass flow rate of $CO_2$. The results have been compared with those of previous work. The heat transfer correlation at the supercritical gas cooling process is also suggested.
Keywords
Carbon dioxide; Supercritical process; Gas cooling; Heat transfer; Pressure drop;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Modeling and analysis of gas coolers /
[ Fang,X.;Bullard,C.W.;Hrnjak,P.S. ] / ASHRAE Trans.
2 Heat transfer of super-critical carbon dioxide flowing in a cooled horizontal tube /
[ Olsen,D.A. ] / Preliminary Proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue
3 Experimental investigation of the CO₂refrigeration cycle /
[ Hwang,Y;Radermacher,R. ] / ASHRAE Trans.
4 Friction-factor equation spans all fluid-flow regimes /
[ Churchill,S.W. ] / Chemical Engineering
5 /
[ Incropera,F.P.;DeWitt,D.P. ] / Introduction to Heat Transfer (2nd ed.)
6 Studies on the characteristics of evaporation and supercritical gas cooling heat transfer of carbon dioxide /
[ Yoon,S.H. ] / Ph. D. thesis. Seoul National University, Seoul Korea
7 Design strategies for R744 gas cooler /
[ Yin,J.M.;Bullard,C.W.;Hrnjak,P.S. ] / Preliminary Proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue
8 Heat transfer and resistance of carbon dioxide being cooled in the supercritical region /
[ Petrov,N.E.;Popov,V.N. ] / Thermal Engineering
9 Convective heat transfer form in-tube cooling of turbulent supercritical carbon dioxide: Part 2-Experimental data and numerical predictions /
[ Pitla,S.S.;Groll,E.A.;Ramadhyani,S. ] / Int. J. HVAC & R Research   DOI   ScienceOn
10 Local heat transfer of carbon dioxide at supercritical pressure under cooling conditions /
[ Krasnoshchekov,E.A.;Kuraeva,I.V.;Protopopov,V.S. ] / High Temperature Institute (Translated from Teplofizika Vyso-kikh Temperatur)
11 The oretical of carbon dioxide refrigeration cycle /
[ Hwang,Y.;Radermacher,R. ] / Int. J. HVAC&R Research   DOI   ScienceOn