Turbocompressor and system for a supercritical-fluid cycle
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United States of America Patent
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May 26, 2015
Grant Date -
Feb 9, 2012
app pub date -
Apr 27, 2010
filing date -
Apr 28, 2009
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Abstract
A turbocompressor for use with a process fluid and including an axial expansion turbine for expanding the process fluid and a centrifugal compressor for compressing the process fluid. The turbine and compressor share a common shaft, all of which can be housed by a common housing that encloses sealed spaces. The axial expansion turbine has a rotor located between two main bearings, and the centrifugal compressor includes an impeller mounted to one end of the shaft. In one embodiment, the main bearings are lubricated by a portion of the process fluid so that the only fluid in the sealed spaces is the process fluid. The turbocompressor can be used in a power-cycle system that includes a heat source and, optionally, an electrical generator.
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