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Schematic diagram of a turboexpander driving a compressor. A turboexpander, also referred to as a turbo-expander or an expansion turbine, is a centrifugal or axial-flow turbine, through which a high-pressure gas is expanded to produce work that is often used to drive a compressor or generator. [1] [2] [3]
Hydrogen turboexpander-generators are used for hydrogen pipeline transport in combination with hydrogen compressors and energy recovery in underground hydrogen storage. A variation is the compressor loaded turboexpanders which are used in the liquefaction of gases such as liquid hydrogen. [2]
Turbo generator; Turbo-alternator; Turboexpander This page was last edited on 15 January 2024, at 12:38 (UTC). Text is available under the Creative Commons ...
The overall principle is high pressure steam is forced over blades attached to a shaft, which turns a generator. As the steam travels through the turbine, it passes through smaller blades causing the shaft to spin faster, creating more electricity. Gas turbines - Gas turbines work much like steam turbines. Air is forced in through a series of ...
The rotor of a turbo generator is a non-salient pole type usually with two poles. [5] The normal speed of a turbo generator is 1500 or 3000 rpm with four or two poles at 50 Hz (1800 or 3600 rpm with four or two poles at 60 Hz). The rotating parts of a turbo generator are subjected to high mechanical stresses because of the high operation speed.
The bearings have to be leak-tight. A hermetic seal, usually a liquid seal, is employed; a turbine oil at pressure higher than the hydrogen inside is typically used. A metal, e.g. brass, ring is pressed by springs onto the generator shaft, the oil is forced under pressure between the ring and the shaft; part of the oil flows into the hydrogen side of the generator, another part to the air side.
The Mitsubishi LE-5A was the world's first expander bleed cycle engine to be put into operational service. [5] The Mitsubishi LE-9 is the world's first first stage expander bleed cycle engine. [6] Blue Origin chose the expander bleed cycle for the BE-3U engine used on the upper stage of its New Glenn launch vehicle. [7]
Part of an axial turbopump designed and built for the M-1 rocket engine. A turbopump is a propellant pump with two main components: a rotodynamic pump and a driving gas turbine, usually both mounted on the same shaft, or sometimes geared together.