Deputy Engineering Manager
Mitsubishi Heavy Industries Compressor Corp
09:15 - 09:45
Thursday, 19 September 2019
T2.7 Mitsubishi Single String LNG Solution
Mitsubishi has introduced a 2.5 to 3.0 mtpa main refrigeration compression string for LNG liquefaction. This is achieved with the H-100 gas turbine driving three main refrigeration compressors. Typical LNG plants utilize two or more gas turbines driving associated refrigeration compressors such as mixed refrigerant and propane refrigeration.
The Mitsubishi LNG Solution provides a significant reduction in total installed cost through the economy of scale of the 100 MW class H-100 gas turbine and the Mitsubishi matched refrigeration compressors. Footprint reduction and elimination of a large number of connections adds further benefits.
This new product also provides flexibility for phased expansion developments in 3.0 mtpa.
Simplification of the train is a major benefit of the H-100 two-shaft gas turbine. This gas turbine starts easily and does not require the complexity of helper motors and associated VFDs. The H-100 starts the compressors at full settle-out pressures, eliminating flaring, plus has a wide speed range, maximizing LNG production.
Mitsubishi operating experience of the H-100 in power generation service since 2010 has positioned the H-100 to be further developed into a mechanical drive gas turbine for LNG main refrigeration service. This verification and validation program began in 2014 and was designed to meet the rigorous requirements of the oil and gas industry for LNG service. In 2017 the program was successfully concluded with full scale H-100 (120 MW ISO) engine testing.
Phase-1 validation in 2016 was for the whole engine tests covering overall design integrity, performances and baseline characteristics of standard DLE combustor (25ppm). And thereafter, the commercial units were delivered to a power generation site accumulating successful operation records. In 2017, Phase-2 test program successfully fulfilled the critical requirement of the LNG mechanical drive, which includes the latest single NOx combustion technology validation with Wobbe index rate of change, LP turbine (power turbine) partial speed performances, locked rotor test, 120% over speed, and engine modular exchange demonstration.