Liquid Requirements for the Cool-Down of Cryogenic Equipment
It Is frequently necessary to estimate the amounts of cryogenic liquid required to cool cryogenic equipment to its operating condition, The purpose of this paper Is threefold: (1) to derive relations for making these estimates; (2) to compute the cool-down requirements for the commonly used liquids (helium, hydrogen, nitrogen, and oxygen) with some commonly used materials (stainless steel, copper, and aluminum); and (3) to present the results of the computations in a readily usable graphical form.
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