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Thermal-hydraulic characteristics of helical coiled once-through steam generators in inclining condition of ocean
School of Energy and Power Engineering, Northeast Electric Power University, Jilin, China.
School of Energy and Power Engineering, Northeast Electric Power University, Jilin, China.
School of Energy and Power Engineering, Northeast Electric Power University, Jilin, China.
School of Energy and Power Engineering, Northeast Electric Power University, Jilin, China.
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2024 (English)In: Annals of Nuclear Energy, ISSN 0306-4549, E-ISSN 1873-2100, Vol. 200, article id 110378Article in journal (Refereed) Published
Abstract [en]

This paper develops a one-dimensional thermal–hydraulic analysis program to simulate the main thermal–hydraulic parameter changes of helical coil once-through steam generator (HCOTSG) under inlet thermal–hydraulic parameters perturbation in inclining and vertical conditions. The inclining process is divided into the process of rotating from the vertical position to the inclining position and the stable inclining process. The rotating process is regarded as swaying motion. The swaying and inclining motions are achieved by modifying the momentum equation. What's more, the code was verified through experiments on two-phase heat transfer and friction pressure drop, as well as comparisons with the design parameters of the HCOTSG of the International Reactor Innovative and Secure (IRIS) reactor. The results of the simulation indicate that the direction of incline has an obvious impact on the safety of the HCOTSG, with inclination towards the y-axis having the greatest impact. In the stable inclining process, an increase in the angle of inclining results in a rise in primary-side outlet temperature and a reduction in heat transfer, while the secondary-side pressure drop increases. Furthermore, the HCOTSG underwent testing with eight types of transient perturbations, including four sudden perturbations and four linear perturbations. Results indicated that during sudden perturbations, apart from the secondary-side pressure drop, there were no substantial differences in simulated results between the inclined and vertical states at the same time during the transition process. However, during linear perturbations, due to the slow changes in parameters, the differences between the inclined and vertical states at the same time were more distinct. Regardless of the perturbation type, the inclined state led to a deterioration in the dynamic condition of the system compared to the vertical state.

Place, publisher, year, edition, pages
Elsevier BV , 2024. Vol. 200, article id 110378
Keywords [en]
Code simulation, Helical coil once-through steam generator, Inclination conditions, Transient perturbation
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-343483DOI: 10.1016/j.anucene.2024.110378ISI: 001178794400001Scopus ID: 2-s2.0-85184019203OAI: oai:DiVA.org:kth-343483DiVA, id: diva2:1837856
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QC 20240215

Available from: 2024-02-15 Created: 2024-02-15 Last updated: 2024-04-04Bibliographically approved

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Xiang, Yan

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