Patent ID: 8726691
Filing Date: 2014-05-20
Classification: F25J,F28D,F28F

Abstract:
1. A method of producing an oxygen product comprising: pumping a liquid oxygen stream having a purity of no less than about 90 percent by volume to produce a pumped liquid oxygen stream; heating the pumped liquid oxygen stream within a heat exchanger through indirect heat exchange with at least a compressed air stream to produce the oxygen product; and the pumped liquid oxygen stream being pressurized by the pumping to an oxygen pressure in a range above about 55 bar(a) and no greater than about 150 bar(a) upon entering the heat exchanger, the pumped liquid oxygen stream being heated within the heat exchanger to a temperature at which the oxygen product will be a supercritical fluid and the air being compressed to an air pressure upon entering the heat exchanger equal to about a value given by an equation in which the air pressure=0.00003×(oxygen pressure)