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Smithies boiler: A development of the pot boiler with added watertubes, used for model steam locomotives. [52] The boiler was invented by F. Smithies in 1900 and developed by Greenly. It consists of a cylindrical water drum hidden inside a larger drum that forms the visible part of the model.
The history of the Vaillant Group dates back to 1874, when Johann Vaillant set up a master fitter's business. In 1894 Johann Vaillant patented a new "closed-system" gas-fired bathroom boiler. [3] This was the first device that made it possible to heat water hygienically, without contaminating it with combustion gases.
Many models sold in the UK have introduced a small heat store within the combination boiler to address this issue. This "keep hot" facility considerably improves the standard of hot water service, which some people otherwise find unacceptably poor with a combination boiler, but it uses considerably more fuel especially in summer.
Vaillant may refer to: Vaillant (surname) Vaillant (automobile) Vaillant, Haute-Marne, a commune of the Haute-Marne department, France; Vaillant and Vaillant, le journal de Pif, children's magazines; Vaillant Group, a group of companies operating in the HVAC and Renewable Energy sectors; a ship sunk by an iceberg in 1897 with the loss of 78 lives
In the flued boiler, any sediment fell past the furnace flue and settled out at the bottom of the boiler shell, where it had less effect. [5] In model engineering, the Cornish boiler, particularly when fitted with Galloway tubes (see Lancashire Boiler, below), is an excellent choice for gas-fired boilers and model steam boats. It is simple to ...
erosion of a boiler's plates from the internal water space, particularly where there is a step inside the shell. This was a problem for early boilers made from lapped plates rather than butted plates, and gave rise to many boiler explosions. In later years it was a problem for the non-circular water drums of Yarrow boilers. Handhole
The only railway use of water-tube boilers in any numbers was the Brotan boiler, invented by Johann Brotan in Austria in 1902, and found in rare examples throughout Europe, although Hungary was a keen user and had around 1,000 of them. Like the Baldwin, it combined a water-tube firebox with a fire-tube barrel.
Condensing boiler manufacturers claim that up to 98% thermal efficiency can be achieved, [3] compared to 70%–80% with conventional designs (based on the higher heating value of fuels). Typical models offer efficiencies around 90%, which brings most brands of condensing gas boiler in to the highest available categories for energy efficiency.