Method and apparatus for controlling a steam cycle
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United States of America Patent
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Jul 12, 2011
Grant Date -
Jan 15, 2009
app pub date -
Jun 24, 2008
filing date -
Jul 10, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a steam cycle apparatus, comprising a reservoir for a liquid operating medium; an evaporator in which the operating medium is evaporator by supply of heat, with the vaporous operating medium being supplied to an expander for expansion and for performing mechanical work and subsequently being liquefied in a condenser which is in connection with a reservoir; an operating medium pump for supplying operating medium from the reservoir to a feed line to the evaporator; a feedback control unit (7) for the operating medium flow; characterized in that the operating medium pump comprises a bypass line which produces a connection between the input side of the operating medium pump and the output side of the operating medium pump, with a controlled overflow valve being arranged in the bypass line whose control element is triggered by the feedback control unit for the operating medium flow for regulating the pressure and/or volume flow of the operating medium in the feed line to the evaporator.
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