Patent ID: 7891197
Filing Date: 2011-02-22
Classification: F17C

Abstract:
1. A method which may be used for the uninterrupted supply of liquid subcooled carbon dioxide at a nearly constant pressure of greater than about 40 bar, the method comprising: a) supplying liquid carbon dioxide at low pressure; b) introducing said low pressure liquid into a low pressure tank for temporary storage, said low pressure being less than 40 bar; c) pumping said low pressure liquid, with a pump means, from said low pressure tank into a high pressure tank, wherein the pressure of said liquid is increased by said pumping; d) storing said increased pressure liquid in said high pressure tank, wherein said increased pressure liquid is pumped into an upper region of said high pressure tank via an upper feed line or a lower region of said high pressure tank via a lower feed line depending upon a pressure in said high pressure tank; and e) removing said increased pressure liquid from said high pressure tank in a state of thermodynamic disequilibrium between the liquid and gas phases, the liquid phase in said high pressure tank is between about 0° C. and about 10° C.