극저온 환경의 인쇄기판형 열교환기 열적성능에 대한 실험적 연구

• Published in: 설비공학 논문집, 27(8) Vol. 27; no. 8; pp. 426 - 431
• Main Authors: 김동호(Dong Ho Kim), 나상준(Sang Jun Na), 김영(Young Kim), 최준석(Jun Seok Choi), 윤석호(Seok Ho Yoon)
• Format: Journal Article
• Language: Korean
• Published: 대한설비공학회 2015
• Subjects: 기계공학; Heat transfer correlation(열전달 상관식); Printed circuit heat exchanger(인쇄기판형 열교환기); Cryogenic heat exchanger(극저온 열교환기)
• ISSN: 1229-6422; 2465-7611
• DOI: 10.6110/KJACR.2015.27.8.426

The advantages of a printed circuit heat exchanger (PCHE) are the compactness and efficiency derived from its heat-transfer characteristics; furthermore, a PCHE for which a diffusion bonding method was used during production can be applied to extreme environments such as a cryogenic condition. In this study, a micro-channel PCHE fabricated by diffusion bonding was investigated in a cryogenic environment regarding its thermal performance and the pressure drop. The test rig consists of an LN2 storage tank, vaporizers, heaters, and a cold box, whereby the vaporized cryogenic nitrogen flows in hot and cold streams. The overall heat-transfer coefficients were evaluated and compared with traditional correlations. Lastly, we suggested the modified heat-transfer correlations for a PCHE in a cryogenic condition.