The purpose of this study is to propose a dynamic heat transfer model for predicting transient heat recovery steam generator (HRSG) behaviors involving phase changes in heat exchanger tubes. The model deals with any combination of phase states by switching the equations for heat transfer coefficient, specific volume, and friction factor corresponding to their physical characteristics. The model also constrains the change of mass flow calculated by momentum balance to satisfy thermodynamic relationships which are neglected by conventional models. The simulation results show that the proposed model predicts the transient pressure drop, outlet mass flow changes and the reduction in heat transfer coefficient caused by dryout during heating or evaporating processes. In addition, the model improves the accuracy of mass flow transients compared to those obtained by conventional models.
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2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference
July 30–August 3, 2012
Anaheim, California, USA
Conference Sponsors:
- Nuclear Engineering Division
- Power Division
ISBN:
978-0-7918-4496-0
PROCEEDINGS PAPER
Dynamic Heat-Exchanger Model for Any Combination of Water and Steam States Available to Purchase
Eunkyeong Kim,
Eunkyeong Kim
Hitachi, Ltd., Hitachi, Ibaraki, Japan
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Takuya Yoshida,
Takuya Yoshida
Hitachi, Ltd., Hitachi, Ibaraki, Japan
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Tatsurou Yashiki
Tatsurou Yashiki
Hitachi, Ltd., Hitachi, Ibaraki, Japan
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Eunkyeong Kim
Hitachi, Ltd., Hitachi, Ibaraki, Japan
Takuya Yoshida
Hitachi, Ltd., Hitachi, Ibaraki, Japan
Tatsurou Yashiki
Hitachi, Ltd., Hitachi, Ibaraki, Japan
Paper No:
ICONE20-POWER2012-54203, pp. 769-776; 8 pages
Published Online:
October 30, 2013
Citation
Kim, E, Yoshida, T, & Yashiki, T. "Dynamic Heat-Exchanger Model for Any Combination of Water and Steam States." Proceedings of the 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. Volume 2: Plant Systems, Structures, and Components; Safety and Security; Next Generation Systems; Heat Exchangers and Cooling Systems. Anaheim, California, USA. July 30–August 3, 2012. pp. 769-776. ASME. https://doi.org/10.1115/ICONE20-POWER2012-54203
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