Marine Gas Turbine 6 Апрель 2015, 11:32

Designed for the
21st century

The MT30 encompasses the very latest in marine gas turbine technology and gives operators of gas-turbine powered vessels efficiency and
reliability improvements, with a market leading power-to-weight ratio and reduced operating and through-life costs.

Designed with 50 to 60 per cent fewer parts than other aeroderivative gas turbines in its class, the MT30 has been granted type approval from ABS and Lloyds and is DNV design assessed.
It maintains 
operating efficiency down to 25MW. The MT30 can be configured for either mechanical or electrical drive.


The MT30 is a member of the Rolls-Royce Trent aero engine family that has accumulated over 45 million operating hours since entry into service in 1996. Trent engines have secured a 50 per cent share of the orders placed for new generation widebody aircraft, with over 3,800 engines sold.

Capable and affordable

From the outset the MT30 has been designed to provide cost efficient
propulsion for both commercial and naval applications. Ideal for vessels
requiring high power density, it provides the propulsion system designer
with increased flexibility in terms of ship layout. The MT30 can be offered
as part of an integrated power and propulsion system together with
a wide range of Rolls-Royce marine products. Vessel owners can also
benefit from Rolls-Royce TotalCare, which provides a menu of tailored
support options to cater for individual requirements.

Modern technology,
proven at sea

2008 marked the entry into service for the MT30 powering the US Navy’s first littoral combat ship, USS Freedom. The propulsion system
features twin MT30 engines and two diesel engines driving waterjets in a sophisticated combined diesel and gas turbine mechanical arrangement. MT30 has demonstrated excellent performance in service, powering the ship to speeds in excess of 40kts.

MT30 has been selected to power the latest FFX frigate for the Republic of Korea Navy, and MT30 alternator packages will power the UK
Royal Navy’s Queen Elizabeth Class aircraft carriers and the US Navy’s DDG
1000 advanced destroyers.

In addition, the Royal Navy’s innovative Type 26 propulsion system
will be designed around MT30. Type 26 will be the fifth naval platform
to feature the MT30, making it the gas turbine of choice for many of the
World’s future naval programmes.

Modern, state-of-the-art gas turbine technology for the marine market delivering...

• 36MW or 40MW flat rated to 38°C.
• Excellent performance retention with no power loss
between overhauls.
• Member of the aero Trent family providing excellent reliability
and optimised spares availability.
• Self-contained, single lift package.
• Over 40% thermal efficiency.
• Modular design for simplified engine maintenance.
• Low emission levels.

Advanced design –
proven technology

The compact and lightweight MT30 is a twin-spool, high-pressure ratio gas generator with a free power turbine, an eight stage variable
geometry intermediate pressure compressor and a six-stage corrosion protected high pressure compressor. Three stages of variable vanes
and blow off valves are provided for compressor handling purposes and a continuous flow of IP delivery air is taken for bearing sealing and
cooling purposes.

The four-stage free power turbine is derived from the Industrial
Trent and Trent 800 and is supported on a robust bearing structure for
optimum reliability.

Proven components, incorporating the latest blade cooling
technologies are employed throughout. Key components are
protectively coated for service in the marine environment to reduce
maintenance and deliver long service life.

Using commercially available fuels MT30 meets all current and
anticipated legislation on emissions and smoke without modification.
The MT30 is exceptionally  light weighing 6,500kg.

Compact and power dense

With the gas turbine change unit (including power turbine) weighing 6,500kg and the total module weight including enclosure and ancillary
components in the order of 30,000 kg (dependent upon options) the MT30 offers
a highly competitive power-to-weight ratio.
To simplify 
installation the entire module can be installed on the base plate for a single lift, saving time and money.

Excellent performance retention

Maximum power and efficient fuel consumption throughout life:
• Turbine operates at 70°C below design limits
• Short and robust structure maintains gas path tolerances

Operational flexibility

There are no operational limitations on re-starting of the engine.
After normal or emergency shutdowns, the engine can be restarted
at any time.

The free power turbine allows a wide range of matching of
output speed to spool speed. This allows the MT30 to operate a
range of cube law power curves and output through a wide range
of drive configurations. This also gives excellent speed control
characteristics and frequency recovery for sudden load changes in
generator applications.

Type approvals

• ABS - Type approved at 36MW for Steel Vessel Rules
and Naval Rules
• ABS - Type approved at 40MW for Steel Vessel Rules
• Lloyds Register - Type approved at 36MW to 38°C and 40MW
at 15°C (ISO) for ship and naval ships
• DNV - Design assessed for type approval for Classification of ships/
high-speed and light craft

The MT30 features

• High-pressure ratio gas generator with free power turbine
• Low vibration unit, resiliently mounted
• Fully Integrated Control System
• Condition monitoring system
• Electric or hydraulic start
MT30 can be removed either via the enclosure side or air inlet using a removable rail
system. Optimised package and tooling design allows for complete engine removal and
replacement within 36 hours.

Lowest maintenance costs – less than two manhours scheduled maintenance per week

Reliability Centred Maintenance studies were a feature of the engine
design which together with an inherently low maintenance design has
resulted in a condition based maintenance philosophy with scheduled
on-board maintenance limited to less than two hours per week –
significant advantage in meeting modern navies’ lean crew requirements.

The acoustic engine enclosure design optimises on-board
maintenance procedures, providing space and access for ships
staff to complete more complex maintenance tasks without
removing the engine.

In the event that engine removal is required it can be achieved
by removal through either the air intake or via the side of the
enclosure, depending upon customer requirements. Both methods
employ a removable rail system to safely guide the engine which can
be installed inside the package when required.

The engine removal system is designed to achieve complete
engine exchange in less than 48 hours, however in practice the
exchange has been carried out successfully in less than 36 hours.

The engine successfully completed its 1,500 hours ABS
endurance test in 2005 taking less than 6 months. This was achieved
at 38°C or above for the entire duration of the test. This is the first gas
turbine to have successfully completed this arduous test programme
in these actual conditions, reinforcing confidence that the MT30 will
deliver world-leading times between overhaul.

Fully Integrated
Control System

The MT30 control system provides fully integrated alarm, monitoring and control functions for the packaged gas turbine,
including overspeed protection. An integral back-up power supply is an option. A distributed processing architecture uses modern databus technology to provide improved reliability through simplified wiring and a reduced number of connectors, with main processors and power supplies located on the outside of the package enclosure. The system supports unmanned operation by making engine control and monitoring available over dual redundant databus and hard-wired signals for full integration into the platform control system. It can also 
be set to log predetermined engine/package data for optional  off-board engine health monitoring and logistical support. A local control panel is provided to display all necessary engine and package parameters and enabling control of 
engine functions, maintenance and calibration activities.