Numerical investigation of influence of non-condensable gas on steam jet condensation

被引：0
|
作者：
Li H. [1 ]
Tian M. [1 ]
Qu X. [2 ]
机构：
[1] School of Energy and Power Engineering, Shandong University, Jinan
[2] School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷
关键词：
CFD; Direct contact condensation; Non-condensable gas; Two phase flow;
D O I：
10.11949/0438-1157.20200728
中图分类号：
学科分类号：
摘要：
The influence of non-condensable gas on the direct contact condensing behavior and heat transfer characteristics of steam jet in subcooled water is investigated by two-dimensional axisymmetric numerical model. Based on Euler-Euler two-fluid model in CFX, the steam condensation is calculated with thermal phase change model. The composition variation of steam-air mixture is realized using species transport equation for the gas phase. The gas mass flow at nozzle outlet is 300 kg/(m2•s), and non-condensable gas is within 15%. The results show that non-condensable gas obstructs the direct contact between steam and subcooled water, forming the thermal resistance and deteriorating the condensation heat transfer. The thermal resistance and the length of jet region increase with the increase of non-condensable gas. While the condensation rate decreases with the increase of non-condensable gas. The presence of non-condensable gas prevents vapor from being condensed completely, and the remaining vapor is independent of the original non-condensable gas. © 2020, Editorial Board of CIESC Journal. All right reserved.
引用
收藏
页码：135 / 141
页数：6
相关论文
共 20 条
  • [1] Kerney P J., Penetration characteristics of a submerged steam jet, AIChE Journal, 18, 3, pp. 548-553, (1972)
  • [2] Chun M H, Kim Y S, Park J W., An investigation of direct condensation of steam jet in subcooled water, IEEE Electron Device Letters, 23, 9, pp. 547-549, (1997)
  • [3] Kim Y S, Park J W, Song C H., Investigation of the stem-water direct contact condensation heat transfer coefficients using interfacial transport models, International Communications in Heat & Mass Transfer, 31, 3, pp. 397-408, (2004)
  • [4] Wu X Z, Yan J J, Shao S F, Et al., Experimental study on the condensation of supersonic steam jet submerged in quiescent subcooled water: steam plume shape and heat transfer, International Journal of Multiphase Flow, 33, 12, pp. 1296-1307, (2007)
  • [5] de With A., Steam plume length diagram for direct contact condensation of steam injected into water, International Journal of Heat and Fluid Flow, 30, 5, pp. 971-982, (2009)
  • [6] Xu Q, Guo L J, Zou S F, Et al., Experimental study on direct contact condensation of stable steam jet in water flow in a vertical pipe, International Journal of Heat and Mass Transfer, 66, pp. 808-817, (2013)
  • [7] Liu G Y, Yan J J, Pan D D, Et al., Research on the steam plume shape and pressure fields of supersonic steam jet in subcooled water, Journal of Engineering Thermophysics, 5, pp. 781-784, (2010)
  • [8] Wu X Z, Yan J J, Pan D D, Et al., Research on flow and heat transfer characteristic of over-expanded supersonic steam jet in water, Journal of Engineering Thermophysics, 12, pp. 2031-2034, (2010)
  • [9] Yuan F, Fan P F, Wu L F, Et al., Research on the penetration length of submerged sonic/supersonic steam jet, Journal of Engineering Thermophysics, 10, pp. 2169-2172, (2015)
  • [10] Choo Y J, Song C., PIV measurements of turbulent jet and pool mixing produced by a steam jet discharge in a subcooled water pool, Nuclear Engineering and Design, 240, 9, pp. 2215-2224, (2010)
12