Patent ID: 7201002
Filing Date: 2007-04-10
Classification: F17C

Abstract:
1. In combination a) pressurized fluid contained in a storage vessel, in both liquid and vapor regions, b) a first heat exchanger in the vapor region of the vessel, c) and a first pressure regulator having an inlet side in communication with liquid in the vessel, and having an outlet side in communication with the first heat exchanger, whereby if pressure in the vessel rises to the setting of the regulator, it opens and admits liquid from the vessel to the heat exchanger, to vaporize in that exchanger causing vapor in the vessel to condense, and reducing pressure in the vessel, d) a second pressure regulator having an inlet side in communication with liquid in the vessel, and a discharge side in series communication with a second heat exchanger, whereby user required flow of liquid passes through the second pressure regulator and second heat exchanger, e) and a third pressure regulator having an inlet side in communication with vapor in the first heat exchanger, and also in communication via a check valve with the inlet side of the second heat exchanger, and with the outlet side of the second pressure regulator, whereby vapor generated in the first heat exchanger flows to the user in by-passing relation to the second pressure regulator, and flows through the third pressure regulator, as for example in the event of absence of user required flow from the vessel, there being no direct interconnection of the first and second regulators outside the vessel, f) and wherein said liquid is LNG and said vapor is vaporized LNG.