Operation of integrated gasification combined cycle power generation systems at part load
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United States of America Patent
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Apr 21, 1998
Grant Date -
N/A
app pub date -
Nov 7, 1995
filing date -
Nov 7, 1995
priority date (Note) -
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Abstract
An integrated gas turbine/air separation system is operated at or below full system load by feeding the air separation unit with air from a dedicated air feed compressor and optionally with extracted air from the gas turbine air compressor. When the gas turbine air compressor discharge drops below a selected pressure at part load conditions, the flow of extracted air to the air separation unit is discontinued and the air separation unit operates at constant pressure supplied only by the air feed compressor. This mode of operation is particularly useful in an integrated gasification combined cycle (IGCC) power generation system and allows the design of the oxygen and nitrogen product compressors such that the compressors operate at high efficiency during full load IGCC operation.
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