The 42 MW Engine
Photo courtesy of Dana Petroleum
The 42 MW marine gas turbine offers simple-cycle, two-shaft performance derived from GE's CF6-80C2 high-bypass turbofan aircraft engine. The same engine is available with a 52 MW rating.
Taking advantage of the CF6-80C2 low-pressure system's normal operating speed of 3600 rpm, the 42 MW marine gas turbine couples loads directly to the low-pressure turbine shaft. This feature allows the commonality of the CF6-80C2 and the 42 MW gas turbine to be maintained. The results are low-cost, field-proven parts for the 42 MW gas turbine. The low-pressure compressor features independently controlled variable inlet guide vanes and the high-pressure compressor features variable stator vanes to modulate airflow, ensuring fast, easy startup/shutdown – even under partial loads.
The 42 MW gas turbine is in use on floating production storage and offloading vessels, offshore platforms and power barges in marine environments. Currently over 1,000 42 MW units have shipped, logging more than 21 million operating hours. GE is now developing a 42 MW mechanical drive package for future maritime applications.
The 52 MW model operates at 3930 rpm and has the advantage of much higher output. GE has developed a mechanical drive package for a variety of offshore projects where space is at a premium. It is particularly suitable especially for FPSOs below deck applications to free up valuable space on the upper deck. The marine module package design for the 52 MW gas turbine has been certified by Lloyd’s Register and RINA Services.
These gas turbines produce low emissions, can operate on a variety of fuels and can be positioned almost anywhere on the ship to increase revenue-generating cargo or passenger space. Both are ideal for FPSOs, LNG carriers and yachts.
|42 MW||52 MW|
|Output||56,900 shp (42,428 kW)||70,275 shp (52,403 kW)|
|Heat rate||6,049 Btu/shp-hr
|Exhaust gas flow||273 lb/sec
|Exhaust gas temperature||853°F (456°C)||930°F (499°C)|
|Power turbine speed||3600 rpm||3930 rpm|
|Average performance, 60 Hertz, 59°F, sea level, 60% relative humidity, no inlet/exhaust losses