Browse > Article
http://dx.doi.org/10.3795/KSME-B.2012.36.1.067

Numerical Study of Gap Size Ratio Effect for Noncondensable Gas Ventilation in Condensers  

Je, Jun-Ho (Dept. of Mechanical Engineering, Pohang University of Science and Technology)
Kim, Soo-Jea (Dept. of Mechanical Engineering, Pohang University of Science and Technology)
Choi, Chi-Woong (Chemistry Department, University of Wyoming)
Kim, Moo-Hwan (Division of Advanced of Nuclear Engineering, Pohang University of Science and Technology)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.1, 2012 , pp. 67-74 More about this Journal
Abstract
A numerical analysis was carried out to estimate the effect of the gap size ratio on the performance of condensers under noncondensable gas ventilation using the porous medium approach (PMA). In the PMA, the details of the tube bundle in the condenser are considered to be those of a porous medium, and the flow resistance term is added in the momentum equation. Three-dimensional analysis of the condensation for a McAllister condenser was conducted with the PMA using Fluent and user-defined functions (UDFs). The gap size effect on the condensation was negligible under pure steam conditions. However, the gap size effect was dominant in condensation with noncondensable gas and external venting. As the gap size decreased, the condensation rate increased for noncondensable gas in an external venting system.
Keywords
Porous Medium Approach; Condensation; Condenser; Non-Condensable Gas; Gap Size Ratio;
Citations & Related Records

Times Cited By SCOPUS : 0
연도 인용수 순위
  • Reference
1 Berman, L.D., 1969, "Determining the Mass Transfer Coefficient in Calculations on Condensation of Steam Containing Air," Thermal Engineering, Vol. 16, No. 10, pp.95-99.
2 Zang, C., Sousa, A. C. M. and Venart, J. E. S., 1991, "Numerical Simulation of Different Types of Steam Surface Condensers," Journal of Energy resources Technology, Vol. 113, pp. 63-70.   DOI
3 Zang, C., Sousa, A. C. M. and Venart, J. E. S., 1993, "The Numerical and Experimental Study of a Power Plant Condenser, Journal of heat transfer, Vol. 115, pp. 435-445.   DOI   ScienceOn
4 Zang, C. and Bokil, A., 1997, "A Quasi-Three- Dimensional Approach to Simulate the Two-Phase Fluid Flow and Heat Transfer in Condensers" International Journal of heat and mass transfer, Vol. 40, No. 15, pp. 3537-3546   DOI   ScienceOn
5 Ormiston, S. J., Raithby, G. D. and Carlucci, L. N., 1995, "Numerical Modeling of Power Station Steam Condensers Part 1: Convergence Behavior of a Finite- Volume Model," Numerical Heat Transfer, Part B, Vol. 27, pp. 81-102.   DOI   ScienceOn
6 Butterworth, D., 1979 April , "The Correlation of Crossflow Pressure Drop Data by Means of the Permeability Concept," AERE-R-9435.
7 Rhodes, D.B. and Carlucci, L.N., 1983, Predicted and Measured Velocity Distributions in a Model Heat Exchanger, Int. Conference on Numerical Methods in Nuclear Engineering, Chalk River, Ontario, pp. 935-948.
8 Carlucci, L.N., 1986, "Computation of Flow and Heat Transfer in Power Plant Condensers," Proceedings of the 8th International heat transfer conference, San Francisco, CA, USA.
9 Bell, B., 2001, "Modeling Shell-and-Tube Condensers with Fluent Using the Porous Medium Approach," Fluent. Inc.
10 Gnielinski, V., 1976, "New Equations for Heat and Mass Transfer in Turbulent Pipe and Channel Flow," International Chemical Engineering, Vol. 16, pp. 359-368.
11 Fujii, T., Uehara, H., Hirata, K. and Oda, K., 1972, "Heat Transfer and Flow Resistance in Condensation of Low Pressure Steam Flowing Through Tube Banks," International Journal of Heat and Mass Transfer, Vol. 15, pp. 247-260.   DOI   ScienceOn
12 Karlsson, T. and Vamling, L., 2005, "Flow Fields in Shell-and-Tube Condensers," International Journal of Refrigeration, Vol. 28, pp. 706-713.   DOI   ScienceOn