Method and apparatus for liquefying a hydrocarbon stream

Apparatus for liquefying a hydrocarbon feed stream, the apparatus at least comprising:

• a liquefying system arranged to receive a compressed hydrocarbon stream, the liquefying system comprising one or more cooling stages involving one or more refrigerant streams, through which cooling stage(s) the compressed hydrocarbon stream passes to provide one or more warmed refrigerant streams and a liquefied hydrocarbon stream;
• one or more refrigerant compressors driven by one or more gas turbines to compress at least one of the warmed refrigerant streams;
• one or more compressors driven by one or more compressor-driving steam turbines;
• and
• one or more heat exchangers and one or more water/steam streams to transfer heat provided by the one or more gas turbines to at least partly drive one or more of the compressor-driving steam turbines,
• wherein the one or more compressors driven by the one or more compressor-driving steam turbines are hydrocarbon feed compressor(s) arranged to receive and compress a hydrocarbon feed stream to provide the compressed hydrocarbon stream.