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公开(公告)号：US11125494B2
公开(公告)日：2021-09-21
申请号：US15746701
申请日：2016-07-21
摘要： A method for starting and operating a plant for the liquefaction of a gaseous product comprising the steps of electrically connecting a variable frequency drive to a motor of a first machine string; increasing the speed of the motor of the first machine string up until a first predefined threshold; electrically disconnecting the variable frequency drive from the motor of the first machine string; electrically connecting the variable frequency drive to a motor of a second machine string; the first predefined threshold is function of said frequency of the power supply grid. The variable frequency drive can be switched during operation of the plant among the strings according to process requirements.
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公开(公告)号：US10457564B2
公开(公告)日：2019-10-29
申请号：US16240530
申请日：2019-01-04
发明人： Marco Fiori , Sergio Ghezzi , Antonio Pelagotti
摘要： The ammonia production plant includes a feed gas compression section, a process air compression section, a syngas compression section and a refrigerant compression section. At least two of these compression sections are combined together forming a combined compression train driven by a single driver.
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公开(公告)号：US11268753B2
公开(公告)日：2022-03-08
申请号：US16320497
申请日：2017-07-26
发明人： Angelo Grimaldi , Antonio Pelagotti
摘要： A compressor system is disclosed, including a first compressor unit having: at least a first gas inlet at a first gas pressure level; a second gas inlet at a second gas pressure level; and a gas discharge; a second compressor unit having: at least a third gas inlet at a third gas pressure level; a fourth gas inlet at a fourth gas pressure level; and a gas delivery. The gas discharge of the first compressor unit is fluidly coupled to one of the third gas inlet and fourth gas inlet of the second compressor unit.
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公开(公告)号：US11692452B2
公开(公告)日：2023-07-04
申请号：US16070492
申请日：2017-01-23
CPC分类号： F01D15/08 , F01D19/00 , F02C7/26 , F02C9/20 , F04D27/0246 , F04D29/462 , F05D2260/85
摘要： A method for operating start-up of a compressor train is disclosed. The train includes a driver machine and at least a centrifugal compressor drivingly coupled to the driver machine. The centrifugal compressor in turn includes a plurality of compressor stages and at least a first set of variable inlet guide vanes at an inlet of one of the compressor stages. The method includes at least partly closing the first set of variable inlet guide vanes; when the first set of variable inlet guide vanes is at least partly closed, starting rotation of the centrifugal compressor and accelerating the centrifugal compressor up to a minimum operating speed; opening the at least one set of variable inlet guide vanes to increase the gas flow through the centrifugal compressor once the minimum operating speed has been achieved.
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公开(公告)号：US10830281B2
公开(公告)日：2020-11-10
申请号：US15759840
申请日：2016-09-23
摘要： The method is used for uniforming temperature in a shaft supported by a fluid bearing during rotation of the shaft; a journal portion of the shaft is located inside the fluid bearing; at least one passage is provided inside the shaft at least along the journal portion so to cross it; at least one flow of heat-exchange fluid is established in the at least one passage; the method allows to overcome the problems due to the “Morton effect”. A bearing system implementing the method is advantageously used in a turbomachine.
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