1500 A, 400 mH급 초전도 직류 리액터용 극저온 냉각 시스템 구조 설계 및 열 해석 Structure Design and Thermal Analysis of Cryogenic Cooling System for a 1500 A, 400 mH Class HTS DC Reactor원문보기
이 논문에서는 대 전류, 고온 초전도 직류 리액터를 위한 전도 냉각 시스템의 구조 설계에 대해 논의하고자 한다. 초전도 자석, 보 빈, 전류 리드, 고정용 구조물 그리고 열 교환기가 포함된 전도 냉각 시스템 부품의 크기를 3D CAD 프로그램을 사용하여 계산하였다. 또한, 최적의 설계 변수를 결정하고 열적-기계적 특성을 분석하기 위해서 유한 요소법 모델을 제작하였다. 리액터 자석의 운전 전류와 인덕턴스는 각각 1,500 A 400 mH이며, 이에 따른 극저온냉동기의 냉각 용량을 결정하기 위해 초전도 직류 리액터에서 발생하는 열 부하를 계산하였다. 또한, 대 전류가 흐르는 1 단부전도 냉각 시스템의 작동 테스트를 수행하였다. 구리 바는 40 K까지 냉각되었고 초전도 리드는 안정적으로 작동했다. 실험 결과로써, 1 단부 영역의 총 열 부하는 190 W였다. 본 연구 결과는 상용 초전도 직류 리액터의 설계 및 제조에 있어 효과적으로 활용 될 것이다.
이 논문에서는 대 전류, 고온 초전도 직류 리액터를 위한 전도 냉각 시스템의 구조 설계에 대해 논의하고자 한다. 초전도 자석, 보 빈, 전류 리드, 고정용 구조물 그리고 열 교환기가 포함된 전도 냉각 시스템 부품의 크기를 3D CAD 프로그램을 사용하여 계산하였다. 또한, 최적의 설계 변수를 결정하고 열적-기계적 특성을 분석하기 위해서 유한 요소법 모델을 제작하였다. 리액터 자석의 운전 전류와 인덕턴스는 각각 1,500 A 400 mH이며, 이에 따른 극저온 냉동기의 냉각 용량을 결정하기 위해 초전도 직류 리액터에서 발생하는 열 부하를 계산하였다. 또한, 대 전류가 흐르는 1 단부전도 냉각 시스템의 작동 테스트를 수행하였다. 구리 바는 40 K까지 냉각되었고 초전도 리드는 안정적으로 작동했다. 실험 결과로써, 1 단부 영역의 총 열 부하는 190 W였다. 본 연구 결과는 상용 초전도 직류 리액터의 설계 및 제조에 있어 효과적으로 활용 될 것이다.
This paper discusses a structure design and thermal analysis of cryogenic conduction cooling system for a high current HTS DC reactor. Dimensions of the conduction cooling system parts including HTS magnets, bobbin structures, current leads, support bars, and thermal exchangers were calculated and d...
This paper discusses a structure design and thermal analysis of cryogenic conduction cooling system for a high current HTS DC reactor. Dimensions of the conduction cooling system parts including HTS magnets, bobbin structures, current leads, support bars, and thermal exchangers were calculated and drawn using a 3D CAD program. A finite element method model was built for determining the optimal design parameters and analyzing the thermo-mechanical characteristics. The operating current and inductance of the reactor magnet were 1,500 A, 400 mH, respectively. The thermal load of the HTS DC reactor was analyzed for determining the cooling capacity of the cryo-cooler. Hence, we carried out the operating test of conduction cooling system of the 1st stage area with high current flow. The cooper bars was cooled down to 40 K and HTS leads operated stably. As a experiment result, the total heat load of the 1st stage area is 190 W. The study results can be effectively utilized for the design and fabrication of a commercial HTS DC reactor.
This paper discusses a structure design and thermal analysis of cryogenic conduction cooling system for a high current HTS DC reactor. Dimensions of the conduction cooling system parts including HTS magnets, bobbin structures, current leads, support bars, and thermal exchangers were calculated and drawn using a 3D CAD program. A finite element method model was built for determining the optimal design parameters and analyzing the thermo-mechanical characteristics. The operating current and inductance of the reactor magnet were 1,500 A, 400 mH, respectively. The thermal load of the HTS DC reactor was analyzed for determining the cooling capacity of the cryo-cooler. Hence, we carried out the operating test of conduction cooling system of the 1st stage area with high current flow. The cooper bars was cooled down to 40 K and HTS leads operated stably. As a experiment result, the total heat load of the 1st stage area is 190 W. The study results can be effectively utilized for the design and fabrication of a commercial HTS DC reactor.
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문제 정의
This paper discusses a structure design of cryogenic conduction cooling system for high current HTS DC reactor. The inductance and the operating current of the HTS DC reactor were 400 mH and 1500 A, respectively.
제안 방법
The inductance and the operating current of the HTS DC reactor were 400 mH and 1500 A, respectively. Dimensions of conduction cooling system parts including HTS magnets, bobbin structures, current leads, support bars, and thermal exchangers were calculated and drawn using a 3D CAD program. A finite element method mol was developed for determining the optimal design parameters and analyzing the thermal characteristics.
The authors designed a conduction cooling system for a toroid-type HTS DC reactor magnet and analyzed its thermal characteristics. The operating current and inductance of the reactor magnet were 1,500 A, 400 mH, respectively.
8 m, and the total wire length of the toroid-type HTS DC reactor magnet is about 3,054 m. The basic structure was referred to the previous research [2], and the major dimensions of the HTS DC reactor were modified to minimize the cooling capacity of the cryo-coolers in this paper. Two layered GdBCO HTS wires were used for the reactor magnet.
The optimal heat load of HTS DC reactor was calculated and analyzed by FEM simulation. The conduction cooling system including cryo-coolers, cryostat, cooling blocks, current leads was assembled to demonstrate the efficient operation of the design. As a result of experiment test, the saturation temperature of copper bars with the operating current of 1500 A was cooled down to 40 K and HTS leads operated stably.
The current lead system, including current feedthroughs, brass loop current leads, copper bars and HTS leads was designed using a 3D CAD program using calculation results. In the 1st stage area, four current feedthroughs were used for vacuum condition.
대상 데이터
In this study, a conduction cooling system was used for cooling the toroid-type HTS DC reactor magnet. In this cooling method, the single-stage (RDK-400) and two-stage (RDK-415D) type Gifford-McMahon (GM) cryo-cooler (Sumitomo Corp.
8. The DPC module for an HTS DC reactor magnet is composed of two D-shape coils, two bobbins, two side plates and joint parts (joint plate, wire holder).
Two copper blocks were attached to the input and output points of HTS leads to hold HTS wires for testing. To monitor the change of temperature, eight silicon diode sensors (DT-760) were attached to the cooling blocks, current leads, HTS leads and radiation shield. The cool down and saturation temperatures in the current leads system were measured and compared to the simulation results.
이론/모형
A 1/10 numerical model of the toroid-type DPC HTS DC reactor magnet was built in the Matlab program as shown in Fig. 2. The flux density of HTS DC reactor magnet was calculated by a numerical method based on Biot-Sawart law. The highest magnetic flux density area of the D-shape coil needs to be considered for determining the critical current of HTS coil.
성능/효과
The magnetic flux density results were shown in Fig. 3. The maximum perpendicular and the parallel flux density were 1.57 T and 4.37 T, respectively. The values obtained by the numerical calculation were applied to all of the DPCs in order to determine the parameters of the magnet.
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