Scotch Marine Boiler

Scotch Marine Boiler

A "Scotch" marine boiler (or simply Scotch boiler) is a design of steam boiler best known for its use on ships.

The general layout is that of a squat horizontal cylinder. One or more large cylindrical furnaces are in the lower part of the boiler shell. Above this is a large number of small-diameter fire-tubes. Gases and smoke from the furnace pass to the back of the boiler, then return through the small tubes and up and out of the chimney. The ends of these multiple tubes are capped by a smokebox, outside the boiler shell.

The Scotch boiler is a fire-tube boiler, in that hot flue gases pass through tubes set within a tank of water. As such, it is a descendant of the earlier Lancashire boiler and like the Lancashire it uses multiple separate furnaces to give greater heating area for a given furnace capacity. It differs from the Lancashire in two aspects: a large number of small diameter tubes (typically 3 or 4 inches diameter each) are used to increase the ratio of heating area to cross-section. Secondly the overall length of the boiler is halved by folding the gas path back on itself.

Read more about Scotch Marine Boiler:  Combustion Chamber, Origins, Use in Ships

Famous quotes containing the words scotch and/or marine:

    Wooing, wedding, and repenting, is as a Scotch jig, a measure, and a cinquepace; the first suit is hot and hasty, like a Scotch jig, and full as fantastical; the wedding, mannerly-modest, as a measure, full of state and ancientry; and then comes repentance and, with his bad legs, falls into the cinquepace faster and faster, till he sink into his grave.
    William Shakespeare (1564–1616)

    God has a hard-on for a Marine because we kill everything we see. He plays His game, we play ours.
    Stanley Kubrick (b. 1928)