Method and system for LNG production using standardized multi-shaft gas turbines, compressors and refrigerant systems

A method of producing liquefied natural gas (LNG), comprising:

• forming an LNG production train by matching a standardized single compression string to a refrigerant heat exchanger system and to a heat rejection system,
• wherein the standardized single compression string consists of
• a multi-shaft gas turbine with an output shaft operating a speed below 4,000 rpm, and
• no more than three standardized compressor bodies, each of the compressor bodies being applied to one or more refrigeration compressors employed in one or more refrigerant cycles;
• wherein the standardized single compression string is designed for a range of feed gas compositions and ambient temperatures
• wherein the multi-shaft gas turbine comprises a large scale multi-shaft gas turbine having a maximum power output larger than 70 megawatts;
• using the standardized single compression string, producing LNG where the refrigerant heat exchanger system and heat rejection system are designed for the range of feed gas compositions and ambient temperatures and are installed in locations and facilities without substantial reengineering and modifications.