Browse > Article
http://dx.doi.org/10.5855/ENERGY.2016.25.2.001

Assessment of the MELCOR 1.8.6 condensation heat transfer model under the presence of noncondensable gases  

Yoo, Ji Min (School of Mechanical Engineering, Pusan National University (PNU))
Lee, Dong Hun (School of Mechanical Engineering, Pusan National University (PNU))
Yun, Byong Jo (School of Mechanical Engineering, Pusan National University (PNU))
Jeong, Jae Jun (School of Mechanical Engineering, Pusan National University (PNU))
Publication Information
Journal of Energy Engineering / v.25, no.2, 2016 , pp. 1-20 More about this Journal
Abstract
A condensation heat transfer model is very important for the safety analysis of nuclear power plants. Especially, condensation under the presence of noncondensable gases (NCGs) is an important issue in nuclear safety because the presence of even a small quantity of NCGs in the vapor largely reduces the condensation rate. In this study, the condensation heat transfer model of the severe accident analysis code MELCOR 1.8.6 has been assessed using a set of condensation experiments performed under the thermal-hydraulic conditions similar to those inside a containment during design-basis accidents or severe accidents. Experiment conditions are categorized into 4 types according to the shape of the condensation surface: vertical flat plates, outer surface of vertical pipes, inner surface of vertical pipes, the inner surface of horizontal pipes. The results of the calculations show that the MELCOR code generally under-predicts the condensation heat transfer except the condensation on inner surface of vertical pipes.
Keywords
Condensation heat transfer; Noncondensable gases; The MELCOR code; MELCOR 1.8.6;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Nusselt, W. (1916). The surface condensation of water vapour. Zeitschrift des Vereines Deutscher Ingenieure, 60, 541-546.
2 Rohsenow, W. M., et al. (1956). Effect of vapour velocity on laminar and turbulent film condensation. Trans. ASME, 78, 1637-1643.
3 Chen, S. L., et al. (1987). General film condensation correlations. Experimental Heat Transfer, Vol. 1, No. 2, 93-107.   DOI
4 Dhir, V. K., and Lienhard, J. (1971). Laminar film condensation on plane and axisymmetric bodies in nonuniform gravity. Journal of Heat Transfer, 93(1), 97-100.   DOI
5 Shah, M. M. (1979). A general correlation for heat transfer during film condensation inside pipes. International Journal of Heat and Mass Transfer, 22(4), 547-556.   DOI
6 Collier, J. G., and Thome, J. R. (1994). Convective boiling and condensation. (3rd ed). CLARENDON PRESS·OXFORD.
7 Dobson, M. K., and Chato, J. C. (1998). Condenation in smooth horizontal tubes. Heat Transfer, 120(1), 193-213.   DOI
8 Jung, D., et al. (2003). Flow condensation heat transfer coefficients of pure refrigerants. International Journal of Refrigeration, 26(1), 4-11.   DOI
9 Cavallini, A., et al. (2006). Condensation in horizontal smooth tubes: a new heat transfer model for heat exchanger design. Heat Transfer Engineering, 27(8), 31-38.   DOI
10 Longo, G. A., and Gasparella, A. (2007). Heat transfer and pressure drop during HFC-134a condensation inside a commercial brazed plate heat exchanger. International Congress Refrigeration, Beijing.
11 Bae, S. H. (2015). Thermal-hydraulic performance analysis of a passive containment cooling system using the MARS code. Pusan National University Master thesis.
12 안태환 외. (2015). 경사유로 관내 응축 실험장치 PICON 구축 보고서. 안전기술보고서, NSTAR-15NS11-04.
13 Wen Fu, et al. (2015). Assessment of the MELCOR and RELAP5-3D code for condensation in the presence of noncondensable gas. NURETH-16, Chicago.
14 Gauntt, R. O. (2005). MELCOR Computer Code Manuals - Vol. 2 : Reference Manuals, Version 1.8.6 September 2005. NUREG/CR-6119, Vol. 2, Rev. 3, SAND2005-5713, Sandia National Laboratories, Albuquerque, New Mexico.
15 Kevin Hogan, et al. (2010). Implementation of a generalized diffusion layer model for condensation into MELCOR. Nuclear Engineering and Design, 240, 3202-3208.   DOI
16 Tuomo Sevon. (2010). MELCOR simulations of steam condensation in a condenser tube. Research report. VTT-R-01503-10.
17 Incropera, F. P., Dewitt, D. P., Bergman, T. L. and Lavine, A. S. (2007). Introduction to heat transfer, 5th Edition, Chapter 7, John Wiley & Sons.
18 Cheng, X., et al. (2001). Experimental data base for containment thermalhydraulic analysis. Nuclear Engineering and Design, 204, 267-284.   DOI
19 Mimouni, S., et al. (2011). CFD modelling of wall steam condensation by a two-phase flow approach. Nuclear Engineering and Design, 241, 4445-4455.   DOI
20 Ambrosini, W., et al. (2006). On various forms of the heat and mass transfer analogy: Discussion and application to condensation experiments. Nuclear Engineering and Design, 236, 1013-1027.   DOI
21 Ladislav Vyskocil. (2014). CFD simulation of airsteam flow with condensation. Nuclear Engineering and Design, 279, 147-157.   DOI
22 Dehbi, A. (2013). Prediction of steam condensation in the presence of noncondensable gases using a CFD-based approach. Nuclear Engineering and Design, 258, 199-210.   DOI
23 Kuhn, S. Z. (1997) An investigation of condensation from steam-gas mixtures flowing downward inside a vertical tube. Nuclear Engineering and Design, 177, 53-69.   DOI
24 Dehbi, A, (1991). The effects of noncondensable gases on steam condensation under turbulent natural convection conditions. Ph.D. dissertation, MIT, Department of Nuclear Engineering, Cambridge, MA.
25 Pan Tong and Guangming Fan. (2015). An experimental investigation of pure steam and steam-air mixtures condensation outside a vertical pin-fin tube. Experimental Thermal and Fluid Science, 69, 141-148.   DOI
26 Pan Tong and Guangming Fan. (2015) Experimental study of steam-air condensation over a vertically longitudinal finned tub. International Journal of Heat and Mass Transfer, 89, 1230-1238.   DOI
27 Kuhn, S. Z. (1995). Investigation of heat transfer from condensing steam-gas mixtures and turbulent films flowing downward inside a vertical tube. Ph.D. dissertation, University of California at Berkeley.
28 H. S. Park and H. C. No. (1998). Assessment of RELAP5/MOD3.2 for steam condensation experiments in the presence of noncondensibles in a vertical tube of PCCS. International Agreement Report.
29 Siddique, M. (1992) The effects of noncondensable gases on steam condensation under forced convection conditions. Ph.D. dissertation, MIT.
30 Wu, T. (2005). Horizontal in-tube condensation in the presence of a noncondensable gas. Ph.D. dissertation, Purdue University.
31 Wu T., and Vierow, K. (2006). Local heat transfer measurements of steam/air mixtures in horizontal condenser tubes. International Journal of Heat and Mass transfer, 49, 2491-2501.   DOI