Yarrow boiler

Yarrow boilers are an important class of high-pressure water-tube boilers. They were developed by Yarrow & Co. (London), Shipbuilders and Engineers and were widely used on ships, particularly warships.

The Yarrow boiler design is characteristic of the three-drum boiler: two banks of straight water-tubes are arranged in a triangular row with a single furnace between them. A single steam drum is mounted at the top between them, with smaller water drums at the base of each bank. Circulation, both upwards and downwards, occurs within this same tube bank. The Yarrow's distinctive features were the use of straight tubes and also circulation in both directions taking place within the tube bank, rather than using external downcomers.^[1]^[2]^[3]

^ Kennedy, Rankin (1912). The Book of Modern Engines and Power Generators. Vol. VI. London: Caxton.
^ Milton, J. H. (1961) [1953]. Marine Steam Boilers (2nd ed.). Newnes.
^ Borthwick, Alastair (1965). Yarrows: the first hundred years. Yarrows.

[Kennedy,_Modern_Engines,_Vol_VI,_Yarrow_boilers-1] Kennedy, Rankin (1912). The Book of Modern Engines and Power Generators. Vol. VI. London: Caxton.

[Milton,_Marine_Steam_Boilers,_Yarrow-2] Milton, J. H. (1961) [1953]. Marine Steam Boilers (2nd ed.). Newnes.

[Yarrow,_First_Hundred_Years,_Yarrow_boilers-3] Borthwick, Alastair (1965). Yarrows: the first hundred years. Yarrows.

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Yarrow boiler

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