Refrigeration – Storage of solidified or liquified gas – Liquified gas transferred as liquid
Reexamination Certificate
2006-02-15
2008-12-16
Doerrler, William C (Department: 3744)
Refrigeration
Storage of solidified or liquified gas
Liquified gas transferred as liquid
C062S614000
Reexamination Certificate
active
07464557
ABSTRACT:
A method of cold recovery in a cold compressed natural gas cycle, the method comprising: compressing air; drying air; heat exchanging air with cold compressed natural gas from a storage vessel, in a first heat exchanger, thereby forming cooled air; heat exchanging the cooled air with liquid methane, in a second heat exchanger, such that the cooled air becomes liquid air and the liquid methane becomes methane; heat exchanging the liquid air with natural gas from a pipeline, in a third heat exchanger, such that the natural gas cools to a cold compressed natural gas and the liquid air becomes air in a gaseous state; discharging the air in a gaseous state. A system of cold recovery comprising: an air dryer; an air compressor in fluid communication with the air dryer; a first heat exchanger in fluid communication with the air compressor; a second heat exchanger in fluid communication with the first heat exchanger; a third heat exchanger in fluid communication with the second heat exchanger; a methane expander valve in fluid communication with the second heat exchanger; a fourth heat exchanger in fluid communication with the methane expansion valve; a methane compressor in fluid communication with the second heat exchanger and with the fourth heat exchanger; a natural gas scrubber in fluid communication with a third heat exchanger; a natural gas pipeline in fluid communication with the first heat exchanger; the fourth heat exchanger, and the natural gas scrubber; and a storage vessel in fluid communication with the first heat exchanger, the third heat exchanger, and the fourth heat exchanger.
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Greenberg Ralph
Vandor David
Blake Michael A.
Doerrler William C
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