Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities

The conductive components of the pyro-breaker in the quench protection system (QPS) have high current density, a large number of electrical contacts and high thermal flux. The water system needs to meet the requirements of cooling and arc extinguishing at the same time. In a previous study, the bott...

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Autores principales:	Jun He, Ke Wang, Jiangang Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	superconducting fusion quench protection pyro-breaker convective heat transfer coefficient enhancement numerical simulation Technology T
Acceso en línea:	https://doaj.org/article/9f92e036314f4eae935c0e02ec492dd9
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spelling	oai:doaj.org-article:9f92e036314f4eae935c0e02ec492dd92021-11-25T17:26:42ZNumerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities10.3390/en142275651996-1073https://doaj.org/article/9f92e036314f4eae935c0e02ec492dd92021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7565https://doaj.org/toc/1996-1073The conductive components of the pyro-breaker in the quench protection system (QPS) have high current density, a large number of electrical contacts and high thermal flux. The water system needs to meet the requirements of cooling and arc extinguishing at the same time. In a previous study, the bottleneck of the steady-state capacity appeared in the barrel conductor of the commutation section, which has a cylindrical cavity. The thermal stability of the commutation section at 100 kA level was simulated in ANSYS/Workbench. The results indicate a certain level of enhancement of the convective heat transfer coefficient of the cavity is required to reach the current capacity. However, the fluid flow inside the cavity is very complex, and the convective heat transfer coefficient is difficult to calculate. In this paper, Computational fluid dynamics (CFD) is applied to the optimization of the cooling water system of the pyro-breaker. By studying the enhancement method of convective heat transfer, optimization of the structure and processing method of the water channel are proposed. The convective heat transfer coefficients of the cylindrical cavity in these optimizations were calculated in CFX. A set of optimizations of the cavity, which can meet the requirements of China Fusion Engineering Test Reactor (CFETR), were obtained and verified by experiments.Jun HeKe WangJiangang LiMDPI AGarticlesuperconducting fusionquench protectionpyro-breakerconvective heat transfer coefficient enhancementnumerical simulationTechnologyTENEnergies, Vol 14, Iss 7565, p 7565 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	superconducting fusion quench protection pyro-breaker convective heat transfer coefficient enhancement numerical simulation Technology T
spellingShingle	superconducting fusion quench protection pyro-breaker convective heat transfer coefficient enhancement numerical simulation Technology T Jun He Ke Wang Jiangang Li Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities
description	The conductive components of the pyro-breaker in the quench protection system (QPS) have high current density, a large number of electrical contacts and high thermal flux. The water system needs to meet the requirements of cooling and arc extinguishing at the same time. In a previous study, the bottleneck of the steady-state capacity appeared in the barrel conductor of the commutation section, which has a cylindrical cavity. The thermal stability of the commutation section at 100 kA level was simulated in ANSYS/Workbench. The results indicate a certain level of enhancement of the convective heat transfer coefficient of the cavity is required to reach the current capacity. However, the fluid flow inside the cavity is very complex, and the convective heat transfer coefficient is difficult to calculate. In this paper, Computational fluid dynamics (CFD) is applied to the optimization of the cooling water system of the pyro-breaker. By studying the enhancement method of convective heat transfer, optimization of the structure and processing method of the water channel are proposed. The convective heat transfer coefficients of the cylindrical cavity in these optimizations were calculated in CFX. A set of optimizations of the cavity, which can meet the requirements of China Fusion Engineering Test Reactor (CFETR), were obtained and verified by experiments.
format	article
author	Jun He Ke Wang Jiangang Li
author_facet	Jun He Ke Wang Jiangang Li
author_sort	Jun He
title	Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities
title_short	Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities
title_full	Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities
title_fullStr	Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities
title_full_unstemmed	Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities
title_sort	numerical analysis of the convective heat transfer coefficient enhancement of a pyro-breaker utilized in superconducting fusion facilities
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9f92e036314f4eae935c0e02ec492dd9
work_keys_str_mv	AT junhe numericalanalysisoftheconvectiveheattransfercoefficientenhancementofapyrobreakerutilizedinsuperconductingfusionfacilities AT kewang numericalanalysisoftheconvectiveheattransfercoefficientenhancementofapyrobreakerutilizedinsuperconductingfusionfacilities AT jiangangli numericalanalysisoftheconvectiveheattransfercoefficientenhancementofapyrobreakerutilizedinsuperconductingfusionfacilities
_version_	1718412365475610624

Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities

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