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This ejector is similar in operation to the steam ejector but uses high-pressure air as the working fluid. Multistage air ejectors can be used, but since air cannot easily be condensed at room temperature, an air ejector is usually limited to two stages as each subsequent stage would have to be significantly larger than the last.
Steam jet cooling uses a high-pressure jet of steam to cool water or other fluid media. Typical uses include industrial sites, where a suitable steam supply already exists for other purposes or, historically, for air conditioning on passenger trains which use steam for heating. Steam jet cooling experienced a wave of popularity during the early ...
A vacuum ejector uses steam pressure to draw air out of the vacuum pipe and reservoirs of continuous train brake. Steam locomotives, with a ready source of steam, found ejector technology ideal with its rugged simplicity and lack of moving parts.
For a steam ejector, the motive fluid is steam. For water-cooled surface condensers, the shell's internal vacuum is most commonly supplied by and maintained by an external steam jet ejector system. Such an ejector system uses steam as the motive fluid to remove any non-condensible gases that may be present in the surface condenser.
The steam ejector is a popular form of pump for vacuum distillation and freeze-drying. A jet of steam entrains the vapour that must be removed from the vacuum chamber. Steam ejectors can have single or multiple stages, with and without condensers in between the stages. While both steam ejectors and diffusion pumps use jets of vapor to entrain ...
Where Q d is the steam quantity at ejector delivery, Q s at ejector suction and Q m is the motive steam quantity. For this reason, a thermocompression evaporator often features a vapor condenser , due to the possible excess of steam necessary for the compression if compared with the steam required to evaporate the solution.
Ejector rack, an aircraft fitting for carrying bombs; Ejector (Transformers), a character from the Transformers franchise; Ejector venturi scrubber, an industrial pollution control device; Giesl ejector, a suction draught system for steam locomotives; Kylpor ejector, a steam locomotive exhaust system; Lempor ejector, a steam locomotive exhaust ...
Air-braked goods wagons were introduced steadily from the mid-1960s (starting with the HAA-type hoppers for the new 'merry-go-round trains' trains) and the Mark 2a coaching stock with air brakes was built from 1967. Diesel and electric locomotives naturally could not use the traditional steam-driven ejector to generate vacuum.
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