Patent ID: 6327872
Filing Date: 2001-12-11
Classification: F17C,F25J,Y10S

Abstract:
A method of producing a pressurized liquid carbon dioxide stream comprising:introducing a feed stream composed of carbon dioxide vapor into a purifying filter;condensing said purified feed stream within a condenser having a sump;introducing an intermediate liquid stream from said sump into first and second pressure accumulation chambers;heating said first and second pressure accumulation chambers to pressurize liquid contained therein to a delivery pressure;delivering said pressurized liquid carbon dioxide stream from said first and second pressure accumulation chambers;the intermediate liquid stream being alternately introduced into said first and second pressure accumulation chambers and said pressurized liquid carbon dioxide stream being alternately delivered from said first and second pressure accumulation chambers such that prior to one of said first and second pressure accumulation chambers becoming empty, the intermediate liquid stream is introduced into the other of said first and second pressure accumulation chamber to ensure continual delivery of said pressurized liquid carbon dioxide stream; andventing each of said first and second pressure accumulation chambers to said condenser prior to introduction of said intermediate liquid stream therein.