수소 전기차용 액체 수소 저장시스템 압력해소밸브 내 스템의이동거리에 따른 극저온 환경에서 열유동 특성 변화Heat Flow Characteristics at the Cryogenic Temperature According to the Distance of Stem in the Liquid Hydrogen Storage System for Hydrogen Electric Vehicles
- Other Titles
- Heat Flow Characteristics at the Cryogenic Temperature According to the Distance of Stem in the Liquid Hydrogen Storage System for Hydrogen Electric Vehicles
- Authors
- 성홍석; 이현복; 이세동; 지수민; 서정세
- Issue Date
- Nov-2023
- Publisher
- 한국기계가공학회
- Keywords
- Pressure Relief Valve(압력 해소 밸브); Hydrogen Vehicle(수소차 ); Fluid Hydrogen(액체 수소) Stem(스템); CFD(전산유체해석)
- Citation
- 한국기계가공학회지, v.22, no.11, pp 35 - 42
- Pages
- 8
- Indexed
- KCI
- Journal Title
- 한국기계가공학회지
- Volume
- 22
- Number
- 11
- Start Page
- 35
- End Page
- 42
- URI
- https://scholarworks.gnu.ac.kr/handle/sw.gnu/68914
- DOI
- 10.14775/ksmpe.2023.22.11.0035
- ISSN
- 1598-6721
2288-0771
- Abstract
- Currently, due to global warming, there is a significant expansion of carbon neutrality policies across the world,focusing on eco-friendly vehicles like hydrogen and electric models. This study examines the fluid flow, direction ofgravity, and distance between the stem and body seats, using CFD to determine the exact specifications of thespring required for the pressure relief valve of the hydrogen tank utilised in a liquid hydrogen electric vehicle.
Under the given boundary conditions, fluid flow was set to both laminar and turbulent, and the direction of gravitywas adjusted to align with and oppose the flow direction at the valve, followed by a comparative and analyticalstudy. The findings revealed that there were no noticeable changes in the pressure difference between the inlet andoutlet, and the temperature difference between the outlet and the inlet did not exhibit any clear trends. Thevariations in the density and volume flow rate at the inlet and outlet varied correspondingly with the temperaturemechanism, displaying a matching trend for each factor. Results showed that the mass flow was greatest at adistance of 5 mm between the body and stem seats, with turbulent flow and direction of gravity in the negative-ydirection.
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