인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
피인용 0
초록·키워드
Liquefied hydrogen (LH₂) must be stored at an ultra-cryogenic temperature of approximately 20 K. If external heat ingress is not effectively minimized, boil-off gas (BOG) generation increases, leading to fuel loss, reduced system efficiency, and potential safety risks. Therefore, reliable experimental methods for evaluating the thermal insulation performance of multilayer insulation (MLI) used in cryogenic storage tanks are essential. Although liquid nitrogen is commonly used as a surrogate cryogen, it cannot sufficiently reproduce the operating conditions of LH₂ storage systems. In this study, a 4 K experimental procedure based on a flat-plate boil-off calorimeter was established in accordance with ASTM C1774. The proposed procedure consists of moisture removal through helium purging, stepwise vacuum conditioning, cryocooler cool-down, liquid helium filling, and BOG flow rate measurement. To verify the applicability of the procedure, an experiment was conducted using a 40-layer MLI specimen (Coolcat 2NW). A steady-state average BOG flow rate of 8,290 mL/min was measured, from which a heat load of Q=0.5059 W and an effective thermal conductivity of k<sub>eff</sub>=0.3147 mW/(m·K) were derived. The established procedure provides a systematic basis for future repeatability studies and comparative evaluations of various insulation materials, thereby contributing to improved reliability in the thermal design of LH₂ storage tanks.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
최근 본 자료 전체보기
