| 摘要 |
A method of liquefying a gas comprises precooling such gas at a first, superatmospheric pressure in a first heat exchanger; and introducing the precooled gas into a cryogenerator to effect condensation thereof. The resulting saturated liquid-wet vapor mixture is passed to a liquid separator and then to a second heat exchanger maintained in a bath of such liquid contained in a thermally isolated reservoir to effect sub-cooling of the saturated liquid and condensation of the wet vapor and sub-cooling of the resulting condensate at a second pressure, such sub-cooling and such condensation resulting in evaporation of a portion of the liquid bath in the reservoir. The sub-cooling is regulated by adjusting the second pressure between a maximum corresponding to the first, superatmospheric pressure and a minimum corresponding to the pressure in the reservoir. The vapor resulting from such evaporation is passed to the first heat exchanger to effect the precooling. Liquid is added from the condensate stream after the liquid separator to the liquid bath to replenish the evaporated liquid.
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