Method and apparatus for thermodynamic cycle
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United States of America Patent
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Feb 13, 1990
Grant Date -
N/A
app pub date -
Jan 11, 1989
filing date -
Jan 11, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for implementing a thermodynamic cycle, which includes the use of a composite stream, having a higher content of a high-boiling component than a working stream, to provide heat needed to partially evaporate the working stream. After being partially evaporated, the working stream is evaporated completely with heat provided by returning gaseous working streams and heat from an auxiliary steam cycle. After being superheated, the working stream is expanded in a turbine. Thereafter, the expanded stream is separated into a spent stream and a withdrawal stream. The withdrawal stream is combined with a lean stream to produce the composite stream. The composite stream partially evaporates the working stream and preheats the working stream and the lean stream. A first portion of the composite stream is fed into a distillation tower. A liquid stream flowing from the distillation tower forms the lean stream that is combined with the withdrawal stream. A vapor stream flowing from the distillation tower combines with a second portion of the composite stream to produce a pre-condensed working stream that is condensed forming a liquid working stream. The cycle is complete when the liquid working stream is preheated prior to being partially evaporated.
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