Large scale production of densified hydrogen to the triple point and below

[摘要] Recent demonstration of advanced liquid hydrogen storage techniques using Integrated Refrigeration and Storage technology at NASA Kennedy Space Center led to the production of large quantities of densified liquid and slush hydrogen in a 125,000 L tank. Production of densified hydrogen was performed at three different liquid levels and LH2 temperatures were measured by twenty silicon diode temperature sensors. Overall densification performance of the system is explored, and solid mass fractions are calculated. Experimental data reveal hydrogen temperatures dropped well below the triple point during testing, and were continuing to trend downward prior to system shutdown. Sub-triple point temperatures were seen to evolve in a time dependent manner along the length of the horizontal, cylindrical vessel. The phenomenon, observed at two fill levels, is detailed herein. The implications of using IRAS for energy storage, propellant densification, and future cryofuel systems are discussed.

[发布机构] NASA Kennedy Space Center, Cryogenics Test Laboratory, Kennedy Space Center, FL; 32899, United States^1;NASA Glenn Research Center, Mail Code: LTF0, Cleveland; OH; 44135, United States^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cylindrical vessels;Large scale productions;Liquid hydrogen storage;NASA Kennedy Space Center;Slush hydrogen;Storage technology;Time dependent;Triple point temperatures