PROPULSION

The 46.1 & 52.7 MW Engines

Photo courtesy of Dana Petroleum
GE

The 46.1 MW and 52.7 MW marinated gas turbine modules are built and tested to United States Navy shock requirements and are certified by Lloyd's Register NVR and RINA.
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. These gas turbines are designed for applications requiring high power. Both are ideal for FPSOs, LNG carriers and yachts

The 4.1 MW marine gas turbine

The 46.1 MW marine gas turbine offers simple-cycle, two-shaft performance derived from GE's CF6-80C2 high-bypass turbofan aircraft engine.


The engine takes advantage of the CF6-80C2 low-pressure system's normal operating speed of 3600 rpm and includes features like:

  • Loads directly to the low-pressure turbine shaft, allowing the commonality of the CF6-80C2 and the 46.1 MW gas turbine to be maintained
  • Low-pressure compressor with independently controlled variable inlet guide vanes
  • High-pressure compressor with variable stator vanes to modulate airflow, ensuring fast, easy start-up and shutdown – even under partial loads.

The results are low-cost, field-proven parts for the 46.1 MW gas turbine.

More than 1,000 46.1 MW units have shipped, logging more than 21 million operating hours. It is in use on floating production storage and offloading vessels, offshore platforms and power barges in marine environments.

The 52.7 MW model

The same engine is available with a 52.7 MW rating.

The 52.7 MW (PG model) operates at 3850 rpm and has the advantage of much higher output. GE has developed a mechanical drive package for a variety of off-shore 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

Models

46.1 MW

GE's 46.1 MW (61,851 shp) marine gas turbine is the most fuel-efficient simple-cycle unit in its size class, delivering over 40% thermal efficiency.

General Electric

52.7 MW

GE's 52.7 MW (70,656 shp) marine gas turbine operates at 3850 rpm and has the advantage of much higher output than the 46.1 MW engine.

General Electric

Technical

46.1MW
52.7MW
Output
61,851 shp (46,123 kW)
70,656 shp (52,689 kW)
SFC
.333 lb/shp-hr
202.7 g/kW-hr
.335 lb/shp-hr
203.6 g/kW-hr
Heat rate
66,128 Btu/shp-hr
8,224 Btu/kWs-hr
8,675 kJ/kWs-hr
6,168 Btu/shp-hr
8,279 Btu/kWs-hr
8,773 kJ/kWs-hr
Exhaust gas flow
286 lb/sec
130 kg/sec
306 lb/sec
139 kg/sec
Exhaust gas temperature
853°F (456°C)
921°F (494°C)
Power turbine speed
3600 rpm
3850 rpm
Average performance, 60 Hertz, 59°F, sea level, 60% relative humidity, no inlet/exhaust losses.