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donkey boiler: A donkey boiler is used to supply non-essential steam to a ship for 'hotel' services such as heating or lighting when the main boilers are not in steam, for example, when in port. [3] Donkey boilers were also used by the last sailing ships for working winches and anchor capstans. See also auxiliary boiler.
In the 1880s, engineer Louis Courtot developed a central heating system using radiators and boiler, and established a foundry in Dole (Jura). [16] The factory was acquired by the American Radiator Company in 1898, and a new company established as the Compagnie Nationale de Radiateurs, with a capital of 500,000 francs.
A district heating system uses centrally located boilers or water heaters and circulates heat energy to individual customers by circulating hot water or steam. This has the advantage of a central highly efficient energy converter that can use the best available pollution controls, and that is professionally operated.
These three classifications are: classic, ionic, or induction. These classifications are determined based on the boiler's power output, energy performance, model type, energy consumption, and energy efficiency. [2] In a residential setting, an electric boiler is often used as a backup to a house's heating system.
The back boiler is typically used with a gravity feed circuit to the hot water cylinder, with a vent or overflow to prevent excess pressure build up.It can also be connected to a series of radiators to provide central heating but usually requires an electrical pump to be fitted to circulate the hot water, some systems can use the gravity circuit to include radiators.
Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.
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The New York Central Railroad's Niagara was a class of 27 4-8-4 steam locomotives built by the American Locomotive Company for the New York Central Railroad.Like many railroads that adopted different names for their 4-8-4s rather than “Northerns”, the New York Central named them “Niagaras”, after the Niagara River and Falls.