PRE-COOLING OF NATURAL GAS BY HIGH PRESSURE COMPRESSION AND EXPANSION
A method of producing liquefied natural gas (LNG) is disclosed. A natural gas stream is provided from a supply of natural gas. The natural gas stream is compressed in at least two serially arranged compressors (102,112) to a pressure of at least 13,790 kPA (2,000 psia) to form a compressed natural g...
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Sprache: | eng |
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Zusammenfassung: | A method of producing liquefied natural gas (LNG) is disclosed. A natural gas stream is provided from a supply of natural gas. The natural gas stream is compressed in at least two serially arranged compressors (102,112) to a pressure of at least 13,790 kPA (2,000 psia) to form a compressed natural gas stream (114). The compressed natural gas stream (114) is cooled to form a cooled compressed natural gas stream (114). The cooled compressed natural gas stream (114) is expanded in at least one work producing natural gas expander (120) to a pressure that is less than 20,680 kPA (3,000 psia) and no greater than the pressure to which the at least two serially arranged compressors (102,112) compress the natural gas stream, to thereby form a chilled natural gas stream (122). The chilled natural gas stream (122) is liquefied. (Fig.1) |
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