Method and compressor module for compressing a gas stream
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United States of America Patent
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Nov 25, 2003
Grant Date -
N/A
app pub date -
May 28, 2002
filing date -
Jul 20, 1999
priority date (Note) -
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Abstract
The invention relates to a method and compressor module for compressing a gas stream of entry temperature t.sub.1 with the aid of hydraulically driven piston compressors in two compression stages of an entry pressure p.sub.1 from an intermediate pressure p.sub.2 after the first compression stage and from intermediate pressure p.sub.2 to an exit pressure p.sub.3 after the second compression stage, whereby the gas stream compressed to the intermediate pressure p.sub.2 is cooled back down to the entry temperature t.sub.1 before entering the second compression stage, and identical pressure ratios p.sub.3 /p.sub.2 =p.sub.2 /p.sub.1 are used in the compression stage. According to the invention, the pressure ratios are adjusted by correspondingly adapting a hydraulic fluid stream for driving the first compression stage and a hydraulic fluid stream for driving the second compression stage with regard to the flow rate thereof with the aid of two adjustable hydraulic fluid pumps.
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