선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- In this study, a 10 kW Brayton refrigeration cycle is designed, which is required for cooling an HTS power cable. And the cryogenic turbo expander satisfying it is designed considering the machinability and efficiency in order to contribute to constructing the reverse Brayton refrigerator in the future.
- The boundary condition was set and the analysis was conducted in order to examine the stress and deformation of the impeller. Static structural module of ANSYS 15.
- 5 mm, so that the verification of the mechanical stability is necessary. Therefore, a flow simulation was conducted first to perform structural analysis, and then the von Mises stress of the impeller was confirmed under the pressure that the fluid adds to the vane and the rotation speed. Since an error can take place in the part that was described as if it were processed sharply during the structural analysis, a fillet with a radius of 0.
대상 데이터
- The refrigerants frequently used at cryogenic temperatures include helium, neon, nitrogen, and argon. In this study, the refrigerant, superheated gas near 75 K, is made up of neon and helium. The density of the neon is five times higher than that of helium in the cycle of this paper, so the speed of the fluid is slow.
- 0 was used for the analysis. The material was chosen as STS 304 considering the machinability and thermal deformation since this material has a maximum yield stress of 1400 MPa at 77 K after annealing process [8]. The pressure and temperature conditions of each section were given based on the flow simulation result and the material mechanical property was based on the value of 77K condition.
이론/모형
- In order to examine the performance of the turbo expander, the analysis was conducted by applying the finite element method. An ANSYS 15.
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