A Numerical Study of Wet Steam Condensation over a Corrugated Plate Separator

Abstract:

To provide steam of appropriate quality and to improve the efficiency of steam-water separation over corrugated plates, it is necessary to study the condensation behavior of wet steam moving over a corrugated plate separator. In this paper, classical nucleation theory and a droplet growth model are used to describe the process of wet steam condensation on corrugated plates. The CFX software water droplet condensation model was employed to simulate the process and to allow analysis of the characteristics of wet steam condensation. The results show that: (1) the nucleation rate increases gradually over time and exhibits a positive correlation with the temperature of the wet steam, (2) departure from the saturated state decreases gradually along the flow direction, leading to a concurrent decrease in the steam condensation rate and (3) the steam condensation rate is elevated with increases in the local pressure gradient.

• Periodical: Advanced Materials Research (Volumes 986-987)
• Pages: 805-809
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.986-987.805
• Online since: July 2014
• Authors: Xiao Yi Liu*, Rui Feng Tian, Yan Xin Gao, Lan Xin Sun, Chang Qi Yan
• Keywords: Condensation, Corrugated Plate Separator, Numerical Simulation, Wet Steam

References

[1] J.B. Young. The Spontaneous Condensation of Steam in Supersonic Nozzles. Physico Chemical Hydrodynamics, July 1982, 3(2), pp.57-82.

[2] Lan Xin Sun turbine dehumidification level two-phase flow numerical study. Journal of Harbin Engineering University, 2006: 17-19.

[3] Guha A, Young J.B. Time-Marching Prediction of Unsteady Condensation Phenomena due to Supercritical Heat Addition. IMech E, 199l, C423/057.

[4] South Korea together, Liu Gang, Wang Z. non-equilibrium homogeneous condensation droplets Growth Model of Wet Steam. Chinese Society of Engineering Thermophysics, conference papers, 2009, pp.1-10.

[5] A.J. White, S. Senoo. Numerical simulation of unsteady wet steam flows with non-equilibrium condensation in the nozzle and the steam turbine. ASME joint US-European fluid engineering summer meeting, 2006, p.61.

DOI: 10.1115/fedsm2006-98202

[6] J.B. Young. The spontaneous condensation of steam in supersonic nozzles. Physical Chemical Hydrodynamics, 1982, 3(1): 57～82lows of condensing steam. J. Propul, Power, 1993, 9(4), p.579～587.

[7] A.J. White, J.B. Young. Time-marching method for the prediction of two dimensional, unsteady flows of condensing steam. J. Propul, Power, 1993, 9(4), p.579～587.

DOI: 10.2514/3.23661

[8] Guangqi Liu, Malian Xiang, Jie Liu, Data Handbook of Chemistry and Chemical properties, inorganic volume. Industrial Equipment and Information Engineering, Publishing Center of Chemical Industry Press, 2002, p.1334.

[9] Sidi Fu. The condensation in the high-speed fluid. Beijing: Science Press, 1988, pp.12-26.