公开(公告)号：US20180216879A1

公开(公告)日：2018-08-02

申请号：US15746701

申请日：2016-07-21

申请人： Nuovo Pignone Tecnologie Srl

发明人： Antonio PELAGOTTI ,  Annunzio LAZZARI ,  Andrea ALFANI ,  Oriano ZUCCHI

IPC分类号： F25J1/02 ,  F25B1/053 ,  F25J1/00

CPC分类号： F25J1/023 ,  F02C3/045 ,  F05B2210/11 ,  F25B1/00 ,  F25B1/053 ,  F25J1/0022 ,  F25J1/0042 ,  F25J1/0247 ,  F25J1/0263 ,  F25J1/0284 ,  F25J1/0298 ,  F25J2280/10

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.