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2. Gotland-class submarine - Wikipedia

   en.wikipedia.org/wiki/Gotland-class_submarine

   The Gotland-class submarines of the Swedish Navy are modern diesel-electric submarines, which were designed and built by the Kockums shipyard in Sweden. They are the first submarines in the world to feature a Stirling engine air-independent propulsion (AIP) system, which extends their underwater endurance from a few days to weeks. [2]

3. Stirling engine - Wikipedia

   en.wikipedia.org/wiki/Stirling_engine

   A Stirling engine is a heat engine that is operated by the cyclic expansion and contraction of air or other gas (the working fluid) by exposing it to different temperatures, resulting in a net conversion of heat energy to mechanical work. [1] [2]

4. Air-independent propulsion - Wikipedia

   en.wikipedia.org/wiki/Air-independent_propulsion

   Kockums also delivered Stirling engines to Japan. Ten Japanese submarines were equipped with Stirling engines. The first submarine in the class, Sōryū, was launched on 5 December 2007 and delivered to the navy in March 2009. The eleventh of the class is the first one that is equipped with lithium-ion batteries without a Stirling engine. [16]

5. Ambitious scientists reach one of the deep seas' most ... - AOL

   www.aol.com/ambitious-scientists-reach-one-deep...

   What's more inaccessible than the deep sea? A deep sea blanketed in a thick shell of ice. Yet during a daunting October 2021 mission called the HACON project, a group of over two dozen scientists ...

6. External combustion engine - Wikipedia

   en.wikipedia.org/wiki/External_combustion_engine

   An external combustion engine (EC engine) is a reciprocating heat engine where a working fluid, contained internally, is heated by combustion in an external source, through the engine wall or a heat exchanger. The fluid then, by expanding and acting on the mechanism of the engine, produces motion and usable work. [1]

7. Applications of the Stirling engine - Wikipedia

   en.wikipedia.org/wiki/Applications_of_the...

   A Stirling engine eliminates the need for water anywhere in the cycle. This would have advantages for nuclear installations in dry regions. United States government labs have developed a modern Stirling engine design known as the Stirling radioisotope generator for use in space exploration. It is designed to generate electricity for deep space ...