Heritage
The MT30 is a member of the Rolls-Royce Trent aero engine family that has accumulated over 30 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.
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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. Vessel owners can also benefit from Rolls-Royce TotalCare, which provides a menu of tailored support options to cater for individual requirements.
Applications
The MT30 has been selected by the U.S. Navy to power the DDG 1000 multi-mission destroyer and has recently been selected to power ten Littoral Combat Ships for the U.S Navy. It will also power the Royal Navy’s future carriers and is an ideal option for large LNG tankers, fast logistic vessels and cruise ships.
Summary
- 36MW flat rated to 38oC and 40MW at 15oC (ISO).
- Excellent performance retention with no power loss between overhauls.
- Member of the Trent engine family for high reliability.
- Self-contained, single lift package.
- Over 40% thermal efficiency.
- Modular design for simplified engine maintenance.
- Low emission levels.
What next...
The MT30 Main features:
- High-pressure ratio gas generator with free power turbine
- Low vibration unit, resiliently mounted
- Full Authority Digital Control
- Condition monitoring system
- Electric or hydraulic start
Modular - low-cost maintenance
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 onboard maintenance limited to less than two hours per week – a significant advantage in meeting tomorrow's lean crew requirements.
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The MT30’s modular design enables selected modules to be either overhauled or ‘parked’ to avoid unnecessary costs. Modularity also provides options to exchange modules between engines to reduce turnaround times. 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.
Modularity enables selective overhaul with low cost of ownership.
Excellent performance retention
Maximum power and efficient fuel consumption is guaranteed 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 - Design approved for Classification of Ships and Naval Ships
- DNV - Design assessed for type approval for Classification of ships/high-speed and light craft
Full Authority Digital Control
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. A local touch screen panel is also part of the system to provide control of the gas turbine and support maintenance activities such
as water wash.
What next...
Advanced design – proven technology
The MT30 is a twin-spool, high-pressure ratio gas turbine that can be configured with an axial intake plenum (for funnel installations) or compact rotatable radial intake for machinery space installation.
Compact and lightweight, the MT30 features an eight-stage variable geometry intermediate pressure compressor and a six-stage high-pressure compressor. 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 used throughout. Key components are protectively coated for service in the marine environment to reduce maintenance and deliver long service life.
The annular combustor is similar to the aero parent and designed to burn commercially available distillate fuel to DMA standard, ensuring the MT30 meets all current and anticipated legislation on emissions and smoke. For LNG vessels the MT30 will have dual fuel capability primarily burning boil-off gas lost from the vessel’s main gas storage tanks, but also capable of burning DMA standard fuel when gas is not available.
Lightweight
With the gas turbine change unit (including power turbine) weighing just 6,346kg and a total module weight, including enclosure and ancillary components in the order of 27,780kg (dependent on options) the MT30 offers a highly competitive power-to-weight ratio.
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The MT30 has maximum component commonality with its aero Trent parent for high reliability with low ownership costs.
What next...
A packaged module - simplified ship interface
The MT30 design incorporates all engine accessory systems on the baseplate, simplifying installation for the shipbuilder, which is limited to providing the starter energy, plus fuel, water and electrical connections.
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Engineered as a modular package the MT30 permits installation in a single lift and has a variety of intake and exhaust configurations to suit ship design requirements. This concept ensures the unit arrives on site with the engine, factory tested and ready for quick, low risk installation and commissioning.
The fully packaged module can be supplied for direct drive or power generation - complete with alternator and its own acoustic enclosure. The enclosure can be configured to meet customer machinery space noise specifications.
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Support you can count on
Comprehensive support options are available for every Rolls-Royce marine gas turbine installation. We provide customers with service alternatives designed to maximise engine availability with the lowest through-life costs and manage the technical and financial risks.
Our engine support programmes range from event or term-based maintenance to TotalCare packages with activities selected from a menu of support options.
A typical support package could include:
- Spares provisioning
- Customer training
- Equipment health monitoring
- 24 hour help desk
- Worldwide support teams
- Shipboard maintenance and trouble shooting assistance
- Shore based spare parts availability, replenishment and inventory management
- Engine overhaul
- Spare engine management
Select from a wide range of support options that optimise engine availability and reduce through-life costs.
What next...
