Heat exchanger unit for heat recovery steam generator
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United States of America Patent
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Sep 28, 1993
Grant Date -
N/A
app pub date -
May 29, 1992
filing date -
May 29, 1992
priority date (Note) -
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Abstract
A tubular type heat exchanger unit which utilizes upper inlet and outlet headers which are each series connected to at least three lower parallel headers by multiple elongated vertically-oriented tubes. The lower headers are connected together by a plurality of vertically-oriented U-shaped tubes provided in adjacent banks and rows within a thermally-insulated casing. The U-shaped tubes in each tube row are arranged in a staggered pattern relative to the tubes in the adjacent row. Preferably 4-12 lower headers each having a bank of 4-20 vertical tubes are provided. Such heat exchanger unit is enclosed within a thermally-insulated casing and is suitable for use as an economizer and superheater in heat recovery steam generators (HRSG).
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