Earticle

초록

영어

Liquid hydrogen (LH2) has a higher density than gaseous hydrogen, so it has high transport efficiency and can be stored at relatively low pressure. In order to use efficient bulk hydrogen in the industry, research for the LH2 supply system is needed. In the high-pressure hydrogen station based on LH2 currently being developed in Korea, a heat exchanger is used to heat up supercritical hydrogen at 700 bar and 60 K, which is pressurized by a cryogenic high-pressure pump, to gas hydrogen at 700 bar and 300 K. Accordingly, the heat exchanger used in the hydrogen station should consider the design of high-pressure tubes, miniaturization, and freezing prevention. A helical heat exchanger generates secondary flow due to the curvature characteristics of a curved tube and can be miniaturized compared to a straight one on the same heat transfer length. This paper evaluates the heat transfer performance through parametric study on the distance between coils, guide effect, and anti-icing design of helical heat exchanger. The helical heat exchanger has better heat transfer performance than the straight tube exchanger due to the influence of the secondary flow. When the distance between the coils is uniform, the heat transfer is enhanced. The guide between coils increases the heat transfer performance by increasing the heat transfer length of the shell side fluid. The freezing is observed around the inlet of distribution tube wall, and to solve this problem, an anti-icing structure and a modified operating condition are suggested.

목차

Abstract
1. INTRODUCTION
2. 나선형 열교환기 기초 설계
2.1. 열교환기 배관 선정
2.2. 나선형 열교환기 분배관 길이
2.3. 나선형 열교환기의 2차 유동 및 효과
2.4. 나선형 열교환기 형상 및 해석 모델
3. 열유동 해석 결과 및 성능 비교
3.1. 직선형 및 나선형 열교환기의 성능 비교
3.2. 가이드 유무에 따른 성능 및 유선 비교
3.3. 코일 간 거리에 따른 열교환 성능 비교
4. 열교환기 방빙 설계 방안
4.1. 열교환기 내 국부적인 결빙
4.2. 방빙 설계 방안
4.3. 최종 방빙 설계 방안
5. 결론
REFERENCES

키워드

저자

• Hojun Cha [ Department of Smart Manufacturing Engineering, Changwon National University, Changwon, Korea ]
• Youngjun Choi [ Department of Smart Manufacturing Engineering, Changwon National University, Changwon, Korea ]
• Seokho Kim [ Mechanical engineering, Changwon National University, Changwon, Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537