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2015 | 60 | 1 | 161-169
Tytuł artykułu

Modelling of a passive autocatalytic hydrogen recombiner – a parametric study

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Operation of a passive autocatalytic hydrogen recombiner (PAR) has been investigated by means of computational fluid dynamics methods (CFD). The recombiner is a self-active and self-adaptive device used to remove hydrogen from safety containments of light water nuclear reactors (LWR) by means of a highly exothermic reaction with oxygen at the surface of a platinum or palladium catalyst. Different turbulence models (k-ω, k-ɛ, intermittency, RSM) were applied in numerical simulations of: gas flow, heat and mass transport and chemical surface reactions occurring in PAR. Turbulence was found to improve mixing and mass transfer and increase hydrogen recombination rate for high gas flow rates. At low gas flow rates, simulation results converged to those obtained for the limiting case of laminar flow. The large eddy simulation technique (LES) was used to select the best RANS (Reynolds average stress) model. Comparison of simulation results obtained for two- and three-dimensional computational grids showed that heat and mass transfer occurring in PAR were virtually two-dimensional processes. The effect of hydrogen thermal diffusion was also discussed in the context of possible hydrogen ignition inside the recombiner.
Wydawca

Czasopismo
Rocznik
Tom
60
Numer
1
Strony
161-169
Opis fizyczny
Daty
wydano
2015-03-01
otrzymano
2014-08-14
zaakceptowano
2014-11-27
online
2015-03-12
Twórcy
  • Faculty of Chemical and Process Engineering, Warsaw University of Technology, 1 Waryńskiego Str., 00-645 Warsaw, Poland, Tel.: +48 22 234 6435, Fax: +48 22 825 1440, a.rozen@ichip.pw.edu.pl
Bibliografia
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  • 2. International Atomic Energy Agency. (2011). Mitigation of hydrogen hazards in severe accidents in nuclear power plants. Vienna: IAEA. (IAEA-TECDOC-1661).
  • 3. Reinecke, E. A., Bentaib, A., Kelm, S., Jahn, W., Meynet, N., & Caroli, C. (2010). Open issues in the applicability of recombiner experiments and modelling to reactor simulations. Prog. Nucl. Energy, 52, 136–147.[WoS]
  • 4. Fineschi, F., Bazzichi, M., & Carcassi, M. (1996). A study of the hydrogen recombination rates of catalytic recombiners and deliberate ignition. Nucl. Eng. Des., 166, 481–494.
  • 5. Heitsch, M. (2000). Fluid dynamic analysis of a catalytic recombiner to remove hydrogen. Nucl. Eng. Des., 201, 1–10.
  • 6. Gera, B., Sharma, P. K., & Singh, R. K. (2010). Numerical study of passive catalytic recombiner for hydrogen mitigation. CFD Letters, 2, 123–136.
  • 7. Prabhudharwadkar, D. M., & Iyer, K. N. (2011). Simulations of hydrogen mitigation in catalytic recombiner: Formulation of a CFD model. Nucl. Eng. Des., 241, 1758–1767.
  • 8. Meynet, N., Bentaib, A., & Giovangigli, V. (2014). Impact of oxygen starvation on operation and potential gas-phase ignition of passive auto-catalytic recombiners. Combust. Flame, 161, 2192–2202.[WoS]
  • 9. Klauck, M., Reinecke, E.-A., Kelm, S., Meynet, N., & Bentaib, A., & Allelein, H.-J. (2014). Passive autocatalytic recombiners operations in the presence of hydrogen and carbon monoxide: Experimental study and model development. Nucl. Eng. Des., 266, 137–147.[WoS]
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  • 11. Drinovac, P. (2006). Experimental studies on catalytic hydrogen recombiners for light water reactors. PhD Thesis, RWTH Aachen University, Germany.
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  • 15. Monarch Instrument. (2014). Table of total emissivity. Metals. Retrieved in August 2014, from .
  • 16. Friedel, E., Rosen, A., & Kasemo, B. (1994). A laser induced fluorescence study on OH desorption from Pt in H2O/O2 and H2O/H2 mixtures. Langmuir, 10, 699–708.
  • 17. Prabhudharwadkar, D. M., Aghalayam, P. A., & Iyer, K. N. (2011). Simulations of hydrogen mitigation in catalytic recombiner: Surface chemistry modelling. Nucl. Eng. Des., 241, 1746–1757.
  • 18. Schefer, R. W. (1982). Catalyzed combustion of H2/air mixtures in a flat plate boundary layer: Numerical model. Combust. Flame, 45, 171–190.
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1515_nuka-2015-0002
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