극저온 액체수소 기화기용 인쇄기판 열교환기의 동결 조건에 관한 실험적 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 35; no. 2; pp. 240 - 248
• Main Authors: 김우경(WOOKYOUNG KIM), 김보겸(BOKYEM KIM), 손상호(SANGHO SOHN), 이공훈(KONG HOON LEE), 김정철(JUNGCHUL KIM)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2024
• Subjects: 기계공학; Vaporizer(기화기); Printed circuit heat exchanger(인쇄기판 열교환기); Freezing(동결); Cryogenic liquid hydrogen(극저온 액체수소); Flow and thermal characteristic(열유동 특성)
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/JHNE.2024.35.2.240

The purpose of this study is to investigate the freezing phenomena in printed circuit heat exchanger (PCHE) for cryogenic liquid hydrogen vaporizer. Local freezing phenomena in hot channels should be avoided in designing PCHE for cryogenic liquid hydrogen vaporizer. Hence, the flow and thermal characteristics of PCHE is experimentally investigated to figure out the conditions under when freezing occurs. To conduct lab-scale PCHE experiment, liquid nitrogen is used as a working fluid in cold channels instead of using liquid hydrogen. Glycol water is used as a working fluid in hot channels. Based on the experimental data, ratio between mass flow rates of cold channels and that of hot channels is proposed as contour map to avoid the freezing phenomena in PCHE.