Advanced Solutions for LNG (Liquefied Natural Gas)
General Information
- Description
- References
Supplier for the Complete Value Chain of LNG Solutions
The growing role of liquefied natural gas (LNG) in global energy supplies calls for comprehensive solutions within the LNG value chain. Siemens Energy Oil & Gas has them: offerings for next-generation onshore and offshore plants, based on
- solutions for Electrical LNG
- solutions for Floating LNG
- solutions for Mechanical drive LNG
- solutions for LNG refrigerant compressor
- VSDS compressors
- solutions for Boil-off gas compression
- Industrial IT
– to name just a few examples. Along with advanced services and consulting for the oil and gas industry, they make Siemens an experienced partner in a booming market.
Over the past few decades, LNG has matured to become an economically viable and technically proven and manageable means of transferring natural gas from remote production locations to distant consumers. Apart from the global increase in the cost of primary energy, this development has been driven by increased competition, economies of scale, an emerging spot market for LNG, and substantial advances in technology.
Reducing the specific cost of LNG by upscaling liquefaction trains and increasing their productivity through innovative technologies is a recognized industrial trend. The reduction of greenhouse gas emissions and construction times has become an additional problem, challenging traditional approaches.
Plant reliability and meeting tight delivery schedules are crucial factors for LNG suppliers. The critical question asked by all suppliers is: how can we ensure reliable plant operation and efficiency while keeping plant downtimes to a minimum?
Siemens has the answer.
- Siemens all-electric – usable on land-borne and floating liquefaction plants
- Siemens' solutions for next-generation LNG based on electric motor variable speed drive systems (VSDS) with reliable generators and transformers producing the needed electrical energy can meet this challenge for you. LNG refrigerant compressors driven by VSDS offer the potential for at least 15 days per year of improved plant availability compared with today’s gas turbines – a significant improvement in plant costs.
- Boil–off Gas (BOG) for Siemens Import Terminals
- Plant efficiency is the main focus for Siemens' market-leading solutions for Boil-off gas (BOG) compression. During storage some of the gas may vaporize, and our BOG technology increases efficiency by feeding this vaporized gas back into the cooling cycle or burning it as fuel to power the gas turbines. More than 90 individual machines using Siemens BOG recovery technology have been supplied to LNG production plants and receiving terminals worldwide. For LNG Siemens offers:
- Boil-Off Gas Compressors from 1.5 to 4 MW
- E-motors from 3 to 8 MW
- Terminal Management and Automation
- Automation and safety systems
- Automated loading process
- Tank gauging
- Distribution planning
- Product reconciliation and inventory management
- Business system integration
- Regasification process automation
- Station control (DCS)
- Jetty control (DCS)
- Emergency shutdown (ESD)
- Fire and gas protection
- Berth and mooring control
- Ship-to-shore communication
- Power Transmission and Distribution
- Medium-voltage power supply
- Low-voltage power supply
- Uninterruptible power supply
- Diesel generators
- Instrumentation, actuators
- Process instrumentation
- Capacitance level measurement systems
- Radar level measurement systems
- Infrastructure
- CCTV
- Intercom
- Telephone system (Voice over IP)
- Security and access control
- Tracking of maintenance staff
- Single Source Supplier for the Oil and Gas Industry
Siemens' position as a single source provider of all natural gas compression, from compression drive to power solutions, means you can simplify your project management and communications. Crucially, it means that you can lower costs through reduced lead, installation and commissioning times.
Siemens contributes with
- Two-train LNG plant in Oman
This two-train LNG plant in Oman has been equipped with starter/helper drives for the gas turbines, achieving a 12.5% increase in production. Scope of Siemens delivery:
- Engineering
- Manufacture and supply of four VSDS systems as a gas turbine starter/helper VSDS
- C onverter transformers
- Containerized LCI frequency converters
- Synchronous motors and auxiliaries
- Tandem-casing BOG compressor, type STC-SH (12-6-A) + STC-SV (10-7-A)
- The world’s largest BOG single-shaft compressor at time of order
All components were designed in accordance with Shell DEP specifications.
- Shell Brunei LNG
In 2006, after 34 years of continuous operation in start/stop mode, two Siemens boil-off gas compressors at Shell’s Brunei LNG loading terminal were inspected for the first time. Bearings showed negligible wear, but were replaced as part of a preventive maintenance program. Delivered in 1972, these were the world’s first-ever BOG compressors with adjustable inlet guide vanes – a technology that has become standard for BOG compression applications.
Melkøya Island, off Hammerfest, Norway
The world’s first all-electric LNG plant. Designed for flawless operation in arctic temperatures and rapidly changing operating conditions. Scope of Siemens delivery:
- The world's largest variable speed drive systems (VSDS) rated 65 MW at 3600 rpm for the pre-cooling and sub-cooling compressors
- VSDS-driven compressor string for the methane mix train
- 32-MW VSDS for the liquefication compressor
- CO2 reinjection compressor
- Harmonic study
- Load commuted inverter (LCI) frequency converter units, drive control and fault diagnosis systems
- Transformers
- Containerized harmonic filters
- Converter cooling systems and auxiliary equipment
Abu Dhabi Gas Liquefaction Company Ltd (ADGAS)
Abu Dhabi Gas Liquefaction Company Ltd. (ADGAS) contracted Siemens for the modernization and expansion of the power supply and distribution system of the gas liquefaction plant on “Das Island”. The system is designed to improve security of supply and increase available power reserves. As part of the project, the plant will have a
- New medium-voltage switching substation
- A new power distribution system
- An additional gas turbine with an output of 30 MW
Pertamina/BP, Indonesia
In 2005, Pertamina/BP ordered two tandem casing trains for an LNG plant in Indonesia. Scope of Siemens delivery:
- Two trains with tandem-casing BOG compressors type STC-SH (10-6-A) + STC-SH (10-6-A)
- IGV control
- Dry gas seals encapsulated in heated seal carrier
Nigeria LNG
Relying on Siemens’ experience in LNG applications, Nigeria LNG ordered rotating equipment for propane compression for their Bonny Island LNG project. Scope of Siemens delivery:
- Three compressor trains
- Each comprising one horizontally split single-shaft compressor STC-SH (10-6-A)
- Electric motor
Ras Laffan, Qatar, RasGas LNG plant
Scope of Siemens delivery:
- Project management
- Power distribution system consisting of 33 kV GIS and 6.6 kV AIS
- Annunciation system and medium-voltage bus ducts
- Electrical Integrated Control System ELICS
- Telecommunication system (FOTS via Open Transport Network (OTN))
- Supervision and commissioning services
Nigeria LNG, NNPC
The world’s largest end flash gas (EFG) single-shaft compressor was manufactured for Nigeria LNG, NNPC. Scope of Siemens delivery:
- Five trains with tandem-casing EFG compressors, type STC-SH (14-6-A) + STC-SV (14-8-B),
900 mm impeller diameter - IGV control
- Dry gas seals encapsulated in heated seal carrier
Providence, Rhode Island, USA; LNG regasification plant of Algonquin Gas Transmission Co.
Scope of Siemens delivery:
- Project management
- System integration
- Full station supervisory control
- Station control panel
- LNG tank and pump area control panel
- Gas send-out area control panel (metering)
- Integration of other vendors' skid control panel
- Station HMI and full Ethernet network integration
- Testing, startup and commissioning
- Documentation and training
DABHOL LNG Receiving Terminal in India
In 1997, Siemens delivered the world’s first single-shaft turbocompressor for boil-off gas compression at an LNG receiving terminal. The 2 x 50% machines were designed for the DABHOL LNG Receiving Terminal in India. Scope of Siemens delivery:
- Two trains of STC-SH (06-7-A)
- Single-casing compressors with
- Dry gas seals and
- Adjustable inlet guide vanes (IGV)
LNG receiving terminal Altamira
In 2003, Shell/Total/Mitsui ordered the world's first 1 x 100% single-shaft turbocompressor for BOG recovery for the Altamira LNG receiving terminal. The compressor unit can cope with the large volume fluctuation. Scope of Siemens delivery:
- One single-casing STV-SV (06-6-A) BOG compressor with
- Dry gas seals encapsulated in heated seal carrier
- IGV control
- Automatic start-stop operation
SINES LNG receiving terminal, Portugal, operated by Transgas Atlantico
Scope of Siemens delivery:
- LC500 cryogenic capacitance level measurement
- Sipart PS2 intelligent positioner
- SITRANS LR200 two-wire Radar level system
- Instrumentation
- Field devices
- Cabling
- Automation of valves
Siemens’ first all-electric LNG compressor trains for Indonesia and South-East Asia
In 2008 Siemens was selected to supply motor-driven main-refrigerant compressors for four natural gas liquefaction trains to be installed in an LNG plant owned by Energy World Corporation (EWC) in Indonesia.
Scope of Siemens delivery:
- Four 27-MW electric-motor-driven in-line centrifugal compressors
- Siemens Robicon frequency converter for starting the motors
- 65-MW gas-turbine generator to provide additional support to the local grid
The four 0.5 million tonnes per year (mtpa) liquefaction trains will enable LNG to meet the growing demand in South-East Asia, primarily in Indonesia and the Philippines and possibly also in China and Japan.
These orders represented the largest application of Siemens compressors in an LNG refrigeration cycle in an important and expanding section of the market.