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Superheated steam was widely used in main line steam locomotives. Saturated steam has three main disadvantages in a steam engine: it contains small droplets of water which have to be periodically drained from the cylinders; being precisely at the boiling point of water for the boiler pressure in use, it inevitably condenses to some extent in the steam pipes and cylinders outside the boiler ...
Thermodynamic data is usually presented as a table or chart of function values for one mole of a substance (or in the case of the steam tables, one kg). A thermodynamic datafile is a set of equation parameters from which the numerical data values can be calculated. Tables and datafiles are usually presented at a standard pressure of 1 bar or 1 ...
The water comes (8), and goes into pipes (9). Warmed by the combustion of the fuel (came in 3), steam bubbles forming in these pipes, and arrives in the drum (7). Then steam goes (through 6) in smaller pipes (10) and being superheated here. At last, superheated steam goes to engine room (5).
A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. Superheated steam is used in steam turbines for electricity generation, in some steam engines, and in processes such as steam reforming. There are three types of superheaters: radiant, convection, and separately fired.
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The Great Northern Railway (GNR) Class C1 is a type of 4-4-2 steam locomotive. One, ex GNR 251 (later LNER 3251 in 1924, and LNER 2800 in 1946), survives in preservation. Much like their small boiler cousins, they were capable of reaching speeds of up to 90 mph (145 km/h). [2] [3] They were also known as Large Atlantics. [4] [5]
A high-pressure steam locomotive is a steam locomotive with a boiler that operates at pressures well above what would be considered normal for other locomotives. Most locomotives operate with a steam pressure of 200 to 300 psi (1.38 to 2.07 MPa). [1] In the later years of steam, boiler pressures were typically 200 to 250 psi (1.38 to 1.72 MPa).
Some superheater-fitted engines did not perform as well as was expected, entirely due to a misunderstanding of the needs of a superheated engine [5] By the mid-1920s, designers understood that superheating, large fire-spaces and a good boiler capacity were the key to successful locomotives.