Flow and heat transfer characteristics of supercritical CO2 in vertical tube

被引：0

作者：

Zhu B. ^{[1
]}

Wu X. ^{[1
]}

Zhang L. ^{[1
]}

Sun E. ^{[1
]}

Zhang H. ^{[1
]}

Xu J. ^{[1
]}

机构：

[1] Beijing Key Laboratory of Multiphase Flow and Heat Transfer, North China Electric Power University, Beijing

来源：

Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 04期

关键词：

Experiment; Flow; Heat transfer; Heat transfer correlation; Supercritical carbon dioxide;

D O I：

10.11949/j.issn.0438-1157.20180695

中图分类号：

学科分类号：

摘要：

The heat transfer characteristics of supercritical carbon dioxide in vertical upward tubes under uniform heating were studied experimentally. The inner diameter of the experimental section is 10 mm. The experimental parameters are: pressure 7.5-21 MPa, heat flux 50-413 kW•m-2, mass flux 519-1500 kg•m-2•s-1. The flow heat transfer characteristics in the riser tube were tested under uniform heating conditions. The effects of heat flux, pressure and buoyancy force on the heat transfer characteristics in the circular tube were analyzed. The results show that with the increase of heat flux the heat transfer deterioration occurs, and the peak point of wall temperature moves towards the inlet section. Heat transfer deterioration occurs when the fluid temperature is less than the pseudo-critical temperature and the wall temperature is greater than the pseudo-critical temperature. When increasing pressure, the deterioration of heat transfer is restrained due to the change of physical property tends to be gentle. Buoyancy forces are bad for heat transfer when heat transfer deterioration occurs. Based on the experimental data, the physical properties change and buoyancy influence on heat transfer are considered comprehensively, new supercritical carbon dioxide heat transfer correlations is established, within the range of the experiment condition, deviation from the mean and standard deviation of the predicted values and experimental values were 1.2% and 16.29% respectively. © All Right Reserved.

引用

页码：1282 / 1290

页数：8

共 25 条

[1] Hu L., Chen D.Q., Huang Y.P., Et al., Investigation on the performance of the supercritical Brayton cycle with CO2-based binary mixture as working fluid for an energy transportation system of a nuclear reactor, Energy, 89, pp. 874-886, (2015)
[2] Dong L., Summarization on power technology of supercritical carbon dioxide, China Environmental Protection Industry, 5, pp. 48-52, (2017)
[3] Zhang X.R., Yamaguchi H., An experimental study on evacuated tube solar collector using supercritical CO2, Applied Thermal Engineering, 28, pp. 1225-1233, (2008)
[4] Moullec Y.L., Conceptual study of a high efficiency coal-fired power plant with CO2 capture using a supercritical CO2 Brayton cycle, Energy, 49, pp. 32-46, (2013)
[5] Liu S.H., Huang Y.P., Liu G.X., Et al., Investigation of correlation for forced convective heat transfer to supercritical carbon dioxide flowing in a vertical tube, Nuclear Power Engineering, 38, 1, pp. 1-5, (2017)
[6] Kim D.E., Kim M.H., Experimental study of the effects of flow acceleration and buoyancy on heat transfer in a supercritical fluid flow in a circular tube, Nuclear Engineering and Design, 240, pp. 3336-3349, (2010)
[7] Bae Y.Y., Mixed convection heat transfer to carbon dioxide flowing upward and downward in a vertical tube and an annular channel, Nuclear Engineering and Design, 241, pp. 3164-3177, (2011)
[8] Kim D.E., Kim M.H., Experimental investigation of heat transfer in vertical upward and downward supercritical CO2 flow in a circular tube, International Journal of Heat and Fluid Flow, 32, pp. 176-191, (2011)
[9] Shiralkar B.S., Griffith P., The effect of swirl inlet conditions flow direction and tube diameter on the heat transfer to fluids at supercritical pressure, Journal of Heat Transfer, 92, 3, pp. 465-471, (1970)
[10] Shiralkar B.S., Griffith P., Deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes, Journal of Heat Transfer, 91, 1, pp. 27-36, (1969)

← 1 2 3 →