METHOD AND SYSTEM FOR SUPPLYING AT LEAST ONE WORKING UNIT IN SUB-COOLING CRYOGENIC LIQUID

摘要

A method for supplying subcooled cryogenic liquid to at least one station (P, P1, P2 . . . ) carrying out machining operations, from a storage tank (10), said tank containing, under a storage pressure higher than atmospheric pressure, the cryogenic fluid in the liquid phase at the bottom of the tank and in the gaseous phase at the top of the tank, said tank being suitable for supplying said station (P) with liquid drawn from the bottom of the tank (10), and for being provided with fluid from the outside, characterised in that it involves: providing at least one heat exchanger, submerged in at least one bath of said cryogenic liquid (20), controlling (3, 4) the level of the or each bath at a predefined level; passing the cryogenic liquid coming from the storage tank (10) through the or each heat exchanger before said liquid arrives at said machining station(s); regulating (1, 6, 12,13, 61, 62 . . . ) the pressure of the cryogenic liquid from the or each submerged exchanger before said liquid arrives at said corresponding machining station.