Thermo-Flow Performances for the Main-Auxiliary Integrated Natural Draft Dry Cooling System

ZHANG Zongyang, HOU Yichen, ZHOU Hanyu, JIA He, CHEN Lei, KONG Yanqiang, WANG Weijia, YANG Lijun, DU Xiaoze

热科学学报 ›› 2024, Vol. 33 ›› Issue (3) : 1010-1025.

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热科学学报 ›› 2024, Vol. 33 ›› Issue (3) : 1010-1025. DOI: 10.1007/s11630-024-1937-9  CSTR: 32141.14.s11630-024-1937-9

Thermo-Flow Performances for the Main-Auxiliary Integrated Natural Draft Dry Cooling System

  • ZHANG Zongyang, HOU Yichen, ZHOU Hanyu, JIA He, CHEN Lei, KONG Yanqiang, WANG Weijia*, YANG Lijun, DU Xiaoze
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Thermo-Flow Performances for the Main-Auxiliary Integrated Natural Draft Dry Cooling System

  • ZHANG Zongyang, HOU Yichen, ZHOU Hanyu, JIA He, CHEN Lei, KONG Yanqiang, WANG Weijia*, YANG Lijun, DU Xiaoze
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摘要

近年来,主辅机散热器上下层布置的自然通风空冷系统引起了电力行业的关注。首先,本文建立了两种主辅机集成空冷系统的物理模型,即构型A和构型B。在构型A中,主机空冷散热器布置在上层,辅机空冷散热器布置在下层;在构型B中,主辅机空冷散热器的布置方式相反。进而,针对TMCR和TRL1工况,得到了构型A和构型B的单元-局部-整体的流动换热特性,并通过数值模拟进行了比较。研究结果表明,对于辅机空冷散热器,构型A的冷却性能明显优于构型B,两者相差5.46%至7.55%;而对于主机空冷散热器,构型B显示了较好的冷却性能,二者相差1.15%至2.99%。考虑到辅机冷却系统对冷却性能要求较高,建议采用构型A。本文研究可为主辅机集成自然通风空冷系统的设计及工程应用,提供一定的理论指导。

Abstract

Recently, natural draft dry cooling system with the main-auxiliary integrated air-cooled heat exchangers in the up and lower layers, has drawn attention to the electric power industry. This research firstly develops two physical models for the integrated cooling system, namely Case A and Case B. In Case A, the main air-cooled heat exchanger is arranged in the upper layer and the auxiliary air-cooled heat exchanger arranged in the lower layer, while in Case B, the two heat exchanger systems are arranged in the opposite way. And then, directing at the engineering TMCR and TRL 1 working conditions, the unit-local-overall thermo-flow characteristics of Case A and Case B are obtained and compared by numerical simulation. The findings show that, for the auxiliary air-cooled exchanger, Case A has obviously higher cooling performances than Case B, with the difference varying from 5.46% to 7.55%. Whereas, for the main air-cooled exchanger, Case B shows the recovered cooling performances, with the difference changing from 1.15% to 2.99%. Case A is preferably recommended to the engineering application in consideration of more strict cooling demand of the auxiliary cooling system. Conclusively, this research will provide some theoretical guidelines for the design and construction of the main-auxiliary integrated natural draft dry cooling system.

关键词

integrated dry cooling system / main air-cooled heat exchanger / auxiliary air-cooled heat exchanger / upper layer and lower layer / thermo-flow performances

Key words

integrated dry cooling system / main air-cooled heat exchanger / auxiliary air-cooled heat exchanger / upper layer and lower layer / thermo-flow performances

引用本文

导出引用
ZHANG Zongyang, HOU Yichen, ZHOU Hanyu, JIA He, CHEN Lei, KONG Yanqiang, WANG Weijia, YANG Lijun, DU Xiaoze. Thermo-Flow Performances for the Main-Auxiliary Integrated Natural Draft Dry Cooling System[J]. 热科学学报, 2024, 33(3): 1010-1025 https://doi.org/10.1007/s11630-024-1937-9
ZHANG Zongyang, HOU Yichen, ZHOU Hanyu, JIA He, CHEN Lei, KONG Yanqiang, WANG Weijia, YANG Lijun, DU Xiaoze. Thermo-Flow Performances for the Main-Auxiliary Integrated Natural Draft Dry Cooling System[J]. Journal of Thermal Science, 2024, 33(3): 1010-1025 https://doi.org/10.1007/s11630-024-1937-9

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基金

The financial supports for this research, from the National Natural Science Foundation of China (Grant No. 52006065) and Fundamental Research Funds for Central Universities (2022BJ0273, 2023JC001), are gratefully acknowledged.

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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