Power and propulsion machinery specialist Wärtsilä (Stand 2261) has received contracts from the UK’s Aircraft Carrier alliance for detailed technical support work and long-lead orders for the main and emergency diesel generating sets and their auxiliary and support systems for the Royal Navy’s two Future Aircraft Carrier (CVF) vessels HMS Queen Elizabeth and HMS Prince of Wales.
The main diesel generating sets will form part of the integrated full electric propulsion system for the two 65,000-tonne ships. Wärtsilä has been nominated as preferred supplier for the prime movers of the generator sets, comprising two 12-cyclinder and two 16-cylinder Wärtsilä 38 engines for each CVF.
The main diesel generating sets will supply 40MW of the total installed power of more than 108MW (two Rolls-Royce MT30 gas turbine alternators rated at 36MW apiece will also be fitted) at 11kVA. This power will be distributed shipwide to meet the respective needs of propulsion, ship’s services and the mission system. According to Wärtsilä, its engines were selected for their “durability, reliability, economy, long periods between maintenance and full compliance with today’s and foreseen emissions regulations”.
For survivability, the main diesel generating sets will be installed in two separate machinery spaces. Each ship will also be fitted with a 12-cylinder Wärtsilä 200 engine (already being supplied to the UK’s Type 45 destroyer programme) as a 2MW emergency generator.