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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).
By the end of World War II, 466 of the 866 Dutch steam locomotives as well as 83% of diesel and electric multiple units had been taken to Germany. The Dutch government-in-exile therefore had already ordered new steam locomotives from Nydqvist & Holm AB (NOHAB) in neutral Sweden in 1942 to remedy the vehicle shortage anticipated for the end of ...
An electric–steam locomotive is a steam locomotive that uses electricity to heat the water in the boiler to create steam instead of burning fuel in a firebox. [1] This is a highly unusual type of locomotive that only makes economic sense under specific conditions. Normally, it would be much more efficient to build and use an electric locomotive.
Two of the 0-6-0 locomotives built in 1906, nos. 898 and 900, were the first British locomotives to be provided with Schmidt superheaters when new, the purpose being to increase the temperature of steam produced in the boiler so the minimum of energy was lost. After months of trials, 20 further locomotives with the Schmidt superheater were ...
Steam–electric locomotive may refer to: Heilmann locomotive , an experimental steam locomotives using electric transmission Steam turbine locomotive with electric transmission, a locomotive that is powered by steam turbines and can drive a traction motor by turning an electric generator
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 ...
A superheated boiler on a steam locomotive. L.D. Porta gives the following equation determining the efficiency of a steam locomotive, applicable to steam engines of all kinds: power (kW) = steam Production (kg h −1)/Specific steam consumption (kg/kW h). A greater quantity of steam can be generated from a given quantity of water by ...
A steam locomotive operating at 350 psi (2,400 kPa) would have a temperature of about 220 °C (400 °F), and a specific enthalpy of 960 kJ/kg (440 kJ/lb). [6] Since standard pressure saturated water has a specific enthalpy of just 420 kJ/kg (190 kJ/lb), [ 7 ] the difference between the two specific enthalpies, 540 kJ/kg (240 kJ/lb), is the ...