Once-Through Steam Generator (OTSG) is widely used in nuclear reactor system due to its advantages of compactness. The heat transfer performance of DOTSG is studied in this paper. In order to minimize the DOTSG volume and reduce the pressure drop of coolant, the pitch of inner helical tube is optimized with Pontryagin Maximum Principle (PMP). The double-tube is divided to three regions according to the coolant phase in secondary side. With given heat transfer load, choosing a combination function of minimum tube length and minimum pressure drop constructed with linear weighted method as objective function, the pitch optimization proceeds from superheated region to boiling region, and then to sub-cooled region in sequence, using Maximum Principle and gradient method. Then the pitch and temperature distribution along the axis is obtained respectively. The results show that the optimal pitch keeps constant along the axial direction in sub-cooled region and superheated region, but varies in boiling region. In boiling region, compared with minimum tube length optimization, the optimal tube length is 6.4% longer while the pressure drop is 36.3% smaller; and compared with minimum pressure drop optimization, the optimal pressure drop is 29.1% larger while the optimal tube length is 4.6% smaller. With the optimal pitch, the temperature distribution is in agreement with the general physic rules, which proves the correctness and the feasibility of the Maximum Principle method used for the structural optimization of DOTSG in this paper.
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2014 22nd International Conference on Nuclear Engineering
July 7–11, 2014
Prague, Czech Republic
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-4590-5
PROCEEDINGS PAPER
Helical Pitch Optimization of Double-Tube Once-Through Steam Generator Available to Purchase
Huawei Fang,
Huawei Fang
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Xinyu Wei,
Xinyu Wei
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Shoujun Yan,
Shoujun Yan
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Jiashuang Wan,
Jiashuang Wan
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Fuyu Zhao
Fuyu Zhao
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Huawei Fang
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Xinyu Wei
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Shoujun Yan
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Jiashuang Wan
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Fuyu Zhao
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Paper No:
ICONE22-30468, V02AT09A061; 12 pages
Published Online:
November 17, 2014
Citation
Fang, H, Wei, X, Yan, S, Wan, J, & Zhao, F. "Helical Pitch Optimization of Double-Tube Once-Through Steam Generator." Proceedings of the 2014 22nd International Conference on Nuclear Engineering. Volume 2A: Thermal Hydraulics. Prague, Czech Republic. July 7–11, 2014. V02AT09A061. ASME. https://doi.org/10.1115/ICONE22-30468
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