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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]
A hydrogen turboexpander-generator or generator-loaded expander for hydrogen gas is an axial flow turbine or radial expander for energy recovery through which a high pressure hydrogen gas is expanded to produce work used to drive an electrical generator.
This is required to prevent erosion damage to the blades in the turbo-expander that the flue gas is next routed through. The expansion of flue gas through a turbo-expander provides sufficient power to drive the regenerator's combustion air compressor. The electrical motor–generator can consume or produce electrical power.
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Air turborockets are often referred to as turboramjets, turboramjet rockets, turborocket expanders, and many others. As there is no consensus on which names apply to which specific concepts, various sources may use the same name for two different concepts.
Turbo-expanders are controlled by maintaining the inlet pressure (PIC) at a constant value by controlling the angle of the expander inlet vanes. A split range pressure controller may also modulate a Joule-Thomson valve across the turbo-expander. [10] [4] Pressure in blanketed tanks is maintained by self actuating pressure control valves (PCVs).
The CATS processing train uses turbo-expanders to reduce the temperature of the gas to remove natural gas liquids. [4] CATS gas is first dehydrated with TEG to remove water. The gas is routed to two turbo-expanders in series which chills the gas and condenses out the natural gas liquids, the product is mainly methane.
MAN Turbo AG was a company based in Oberhausen, Germany, that produced turbomachinery, including compressors, expanders, steam and gas turbines. It was owned by the German conglomerate MAN SE . In 2010, MAN Turbo and MAN Diesel were merged to form MAN Diesel & Turbo .