June 2001

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HP Reliability: Expander power absorption methods

Turboexpanders frequently used in refrigeration processes develop power, but recovery of this power has often been of secondary importance. A number of power absorption methods are dire..

Bloch, Heinz P., Hydrocarbon Processing Staff

Turboexpanders frequently used in refrigeration processes develop power, but recovery of this power has often been of secondary importance. A number of power absorption methods are directly applicable to energy recovery expanders. Compressor, direct-connected. The most popular method of absorbing turboexpander power is by means of a single- or two-stage centrifugal compressor, mounted directly on the expander shaft (Fig. 1). In a cryogenic process, there is nearly always a place where this compression energy can be used. Adding a compressor load to the system is inexpensive with turboexpander designs where the bea

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