Friday, March 1, 2013

Fire-tube Boiler

A fire-tube boiler is a type of boiler used in steam locomotives in the 19th and first half of the 20th century. It consisted of a series of tubes running through water contained in a sealed vessel; hot gases from burning coal or wood in a firebox went through these tubes, heating the water inside the container through thermal radiation passing through the walls of the tubes onto the water. The water reached a high boiling point and transformed into high pressure steam, which was used to push the pistons, transmitting the power to the wheels of the locomotive.