Experimental Investigation of Convection Heat Transfer of CO<sub>2</sub> at Supercritical Pressures in a Vertical Circular Tube at Low Re

LI Zhi-hui; JIANG Pei-xue

Volume 31 Issue 1

Feb. 2010

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LI Zhi-hui, JIANG Pei-xue. Experimental Investigation of Convection Heat Transfer of CO2 at Supercritical Pressures in a Vertical Circular Tube at Low Re[J]. Nuclear Power Engineering, 2010, 31(1): 33-37.

Citation:

LI Zhi-hui, JIANG Pei-xue. Experimental Investigation of Convection Heat Transfer of CO₂ at Supercritical Pressures in a Vertical Circular Tube at Low Re[J]. Nuclear Power Engineering, 2010, 31(1): 33-37.

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Experimental Investigation of Convection Heat Transfer of CO₂ at Supercritical Pressures in a Vertical Circular Tube at Low Re

LI Zhi-hui^1,2,
JIANG Pei-xue²

1. State Nuclear Power Technology R&D Centre, Beijing, 100190, China;
2. Key Laboratory for Thermal Science and Power Engineering of Ministry of Educations, Tsinghua University, Beijing, 100084, China

Received Date: 2008-12-29
Rev Recd Date: 2009-11-16

Available Online: 2025-07-29

Publish Date: 2010-02-01

Abstract

Abstract

Convection heat transfer during upward flow of CO₂ at supercritical pressures in a vertical circular tube（d=2mm） at low Reynolds numbers ranged from 750 to 1 970 has been experimentally investi-gated.The results show that the local wall temperature decrease was observed in upward flow at low heat fluxes and the local wall temperature peak at high heat fluxes with upward flow for Re=1970 which were not observed.The trend of wall temperature and the regularity of heat transfer are similar for upward and down-ward flows.
- Supercritical pressure,
- CO₂,
- Low Reynolds numbers,
- Convection heat transfer