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GT-LNG | E-LNG
 

LNG Production

Liquefying the treated natural gas, the refrigeration facility is at the heart of any LNG plant. Traditionally, gas or steam turbines are employed to drive its main refrigerant compressors. However, since a number of years, alternative schemes with fully e-motor driven compressors are a topic of much debate at business conferences and trade shows around the globe – and Siemens has been in the forefront of co-developing the E-LNG concept. As a consequence, we can today offer a choice of traditional and evolutionary drive systems, each with their own characteristics.

Making this far-reaching decision about the driver concept at the very early stages of a LNG project takes some bold thinking but promises large rewards. But whatever the chosen scheme, it will have to prove its fitness to match the project requirements of geographical location, infrastructure, economics, available technologies and personnel, and environmental regulations. For Siemens, the challenge is to engineer the best possible solution for any given framework, whether GT-LNG or E-LNG.
     

Drives for Main Refrigeration Loops

Gas turbines of up to 160 MW (ISO)
Electrical variable-speed drive systems (VSDS) of 75 to 90 MW as main drives
Electrical variablespeed drive systems (VSDS) from 10 to 40 MW as starter/helper motor, or modular starter/helper motor/generator packages for gas turbines. Water-air cooled or water-water cooled electrical systems for all known environments.
   

Compressors for Main Refrigeration Loops

Propane compressors of up to 90 MW
Mixed-refrigerant compressors of up to 90 MW, horizontally or vertically split, nozzles up or down, skid mounted with integrated or separate lube oil systems
   

End-Flash Gas Compression

Compressors of up to 40 MW
 

Boil-Off Gas Compression

Compressors of up to 15 MW, single and tandem casing
 

Field Instrumentation and Analytics

Pressure transmitters
Temperature transmitters
Flow meters
Level measuring instruments
Gas analysers
Remote terminal units
Level measurement in LNG storage tanks and for pump control
Level switches for detection of minimum and maximum level in tanks
Valve positioner for valve control
Chromatograph for determination of gas composition and quality; measuring of colorific value
 Moisture and dew-point measurement in natural gas
   

Automation

Integrated control system for VSDS and compresso automation, including associated instrumentation
Advanced operations control solutions
Integrated data visualization software enabling informed decisions regarding utilization of assets and their operating efficiency
Energy management and control system (EMCS)
   

Power Generation

Simple, combined and triple-cycle schemes with gas and steam turbines including generators and auxiliaries
Heat recovery steam generators
Water steam cycle solutions
Electrical and controls for supplied equipment
Cranes and heat, ventilation and air conditioning (HVAC) for turbine building
Cooling water systems
   

Power Transmission and Distribution

Network planning and consulting services, including harmonic studies
High, medium and low voltage switchgear (Air and SF6 insulated)
High-current switchgear
bus ducts
Power, distribution and special transformers
NER
Substation protection, control and automation systems
Energy management
Motor control center
Emergency diesel generator sets
Uninterruptible power supply systems
Station batteries
Power quality and power correction
Auxiliaries
All services for substations

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