First Marine Gas Turbine Alternator Installed Into New Aircraft Carrier Hms Prince Of Wales

Wed, 04 March 2015

Rosyth, United Kingdom: The Aircraft Carrier Alliance has successfully completed the installation of the first MT30 Gas Turbine Alternator (GTA) package into the Royal Navy’s latest aircraft carrier HMS PRINCE OF WALES, at Babcock’s Rosyth shipyard in Scotland.

The Rolls-Royce MT30 is a 36 megawatt (around 50,000 horsepower) Marine Gas Turbine, and is also the world’s most power-dense, a key feature for naval ships where high power occupying minimum space is essential.

Each 120 tonne GTA package consists of a GE supplied alternator coupled to a Rolls-Royce supplied MT30 Gas Turbine contained within an enclosure.

Two MT30s are installed in each ship and will provide two thirds of the 109 megawatts needed to power the 65,000 tonne ships – enough energy to power a town the size of Swindon.

Jim Bennett, Power & Propulsion Director for the Aircraft Carrier Alliance, said: "The Power & Propulsion Sub-Alliance is immensely proud of this significant milestone in the QEC project. It has been the culmination of many years of hard work to ensure the timely delivery of this first complete MT30 gas turbine alternator to HMS PRINCE OF WALES, which along with its twin will deliver around two thirds of the electrical power generated onboard. Congratulations to all involved, this is British engineering at its best!"

Angus Holt, Delivery Director, HMS PRINCE OF WALES, said: “The successful achievement of this major milestone is symbolic of the progress we are making with the build of the second Queen Elizabeth Class carrier. To have successfully lifted the most powerful engine in the Royal Navy onto the biggest ship ever built for the Royal Navy, using one of the biggest capacity gantry cranes in Europe, is an important event in the construction of HMS PRINCE OF WALES. Everyone involved should take huge pride in their contribution to this national endeavour.”

Don Roussinos, Rolls-Royce, President - Naval said: “The installation of the first MT30 for HMS PRINCE OF WALES marks yet another significant milestone in the Queen Elizabeth Class programme. These aircraft carriers will be the backbone of the Royal Navy’s capability for decades to come and we’re proud to be working alongside such a strong team in the Power & Propulsion sub Alliance, as these highly capable ships get closer to entering service.

“We installed the very first marine gas turbine more than 60 years ago, and are delighted to continue that long and proud history of delivering advanced marine gas turbine and propulsion technology to the Royal Navy.”

The installation involved the lifting of the MT30 gas turbine and associated ancillary equipment housed in a steel package known as the gas turbine enclosure onto the ship structure. With the enclosure in place, the large alternator, which is driven by the gas turbine to produce electrical power, was then hoisted into place. Once operational, the GTAs will supply HV power to the four propulsion motors as well as the 13 ship service transformers. These transformers distribute LV power to the weapons systems, mission systems equipment and navigation systems, as well as power to the hotel services required to run QEC.

Key facts:

The MT30 gas turbine is derived from the Rolls-Royce Trent 800 aero engine which powers the Boeing 777 aircraft, with around 80 per cent of the parts being the same.

Pairs of MT30 gas turbines currently power the US Navy’s Freedom Class variant of the Littoral Combat Ship and will power their new DDG-1000 destroyers.

Single MT30s will also power each of the UK Royal Navy’s new Type 26 Global combat Ships, and the Republic of Korea Navy’s new FFXII frigate.

Modular production of the MT30 begins on the same production line as the Rolls-Royce Trent aero engines in Derby, before the modules are assembled into the marine configuration, and put through a rigorous test and certification programme at the Rolls-Royce Marine Test Facility in Bristol.

The power generated will meet the aircraft carrier’s demand for energy, which includes the propulsion and ships systems, weapons, aircraft and navigation systems as well as the entire low voltage requirements for operating such a large vessel.

The four GTA packages (two per ship) are assembled by Cullums Detuners of Derbyshire. Due to the size, the alternator and gas turbine enclosure are shipped to Rosyth separately.

The alternators are manufactured by GE at their RMR site in Rugby, weighing around 70 tonnes.

With a rated power output of 35MWe, the alternators are a unique machine built for QEC.

For more information, please contact:

Alan Macaskill, Aircraft Carrier Alliance
Tel: +44 (0) 1383425757  Mob: +44 (0) 7823520086

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