Physical and Technical Data of Liquid Hydrogen

Abstract

Very detailed and extensive literature exists about the physical and technical data for hydrogen. The following data in the form of tables and diagrams represent a small selection of values which are often used and were chosen with respect to the handling of liquid hydrogen including safety aspects. The data is not limited to liquid hydrogen alone because liquid hydrogen can always be a potential source of large amounts of gaseous hydrogen due to evaporation. The diagrams (in particular figs. 133 to 147) only take para-hydrogen into consideration in the interest of a concise description. In many cases, the originals which were used as a model and which contained a maximum of information, were simplified and schematized for the sake of clarity. For more detailed information refer to the sources as well as appropriate computer programs¹, i.e., mainly to R. D. McCarty, J. Hord, H. M. Röder; National Bureau of Standards Monograph 168, Selected Properties of Hydrogen (Engineering Design Data), 523 p. (1981), in which there is also a detailed compilation of relative literature. For the permission to publish this data as well as the support provided, the author wishes to express his gratitude to the National Bureau of Standards and especially to J. Hord of the NBS Boulder Division.