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One rare use of the thimble tube boiler as a directly fired power generator was an experiment fitting to Leyland steam wagons in 1920. [ 7 ] [ 8 ] This coke -fired boiler was 2 feet (0.61 m) diameter by 2.75 feet (0.84 m) height and has 128 tubes. [ 7 ]
Steam was generated in a standard locomotive boiler, with superheater, and passed to a turbine generator. Exhaust steam was condensed and recirculated by small auxiliary turbine pumps. [9] The armatures of the motors were mounted directly on the four driving axles. It was later rebuilt as a direct-drive turbine locomotive as noted above.
Clarkson thimble tube boiler [15]: the original thimble-tube boiler, using a great many short closed-ended watertubes. Often used for heat-recovery from the exhaust of large Diesel engines. [16] Climax boiler: A vertical water-tube boiler with many long spiral coils around a central steam-and-water drum. [17]
The first W501A installed by Dow Chemical at its Freeport, TX, complex in 1968 was supercharged to enhance performance and available exhaust energy. Small "helper" steam turbine, coupled to generator was used for starting the gas turbine. In early applications, Dow typically used gas turbine exhaust as pre-heated "air" for fully fired boilers.
Dynamo / Turbo-generator / Generator Electrical generator driven by a small steam turbine, for the headlight and other locomotive lighting. [3]: 29 Sand dome Holds sand that is directed on to the rail in front of the driving wheels to improve traction, especially in wet or icy conditions or when vegetation is on the line, and on steep gradients.
The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It can also serve as a reversing gear. It is sometimes referred to as the "motion".
'Wilberforce' boiler in section The first recorded boiler of comparable form was used in a railway locomotive, Hackworth's 'Wilberforce' class of 1830. [2] This had a long cylindrical boiler shell similar to his earlier return-flued 'Royal George' , but with the return flue replaced by a number of small firetubes, as had been demonstrated so effectively by Stephenson with his 'Rocket' a year ...
The cycle is comparable to a gas-generator cycle engine with turbines driven by main combustion chamber exhaust rather than a separate gas generator or preburner. [ 1 ] The J-2S rocket engine, a cancelled engine developed by NASA, used the combustion tap-off cycle and was first successfully tested in 1969.