Yarrow cauldron
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A Yarrow boiler is a type of steam boiler developed by the British Yarrow Shipbuilders shipyard , which was primarily used on turbine-powered warships .
construction
It is a water tube boiler with three drums in delta shape (Δ) with two small lower drums, which were arranged on both sides of the combustion chamber and which were connected to the central upper drum by straight pipes. The front end of the downpipes were outside the combustion chamber. The straight pipes were easy to clean, but the connection to the top drum was more difficult to establish due to the varying entry angle.
Boiler in production (view from the front)
Boiler in production (oblique view)
Three Yarrow cauldrons
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commitment
The Yarrow boiler is characterized by its compact and robust design and was therefore well suited for the narrow engine rooms of ships. It was combined with both steam engines and later with steam turbines .
The boiler was very successful and was used many times, especially on British ships manufactured by Yarrow itself, but also by other shipyards and other nations that copied the design. In the Royal Navy , it was first used on the HMS Hornet (1893) as a test in the construction of the Havock-class torpedo boat destroyer in 1893 and then introduced. A further development from the time between the world wars was called the Admiralty three-drum boiler and was first installed in the A-Class destroyers from 1929.
During the Second World War, Yarrow boilers were also occasionally used - mounted on a railway frame - as steam generators for mobile power plants for the military.
