Control method for operating a heat recovery steam generator
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United States of America Patent
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Oct 16, 2018
Grant Date -
Oct 26, 2017
app pub date -
Oct 29, 2015
filing date -
Nov 6, 2014
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Abstract
A control method for operating a heat recovery steam generator having a flue gas channel in which an evaporator, having at least two evaporator heating surfaces arranged successively in the flue gas channel and at least one intermediate heating surface arranged between the evaporator heating surfaces, is provided, the method including determining a characteristic value characteristic of the heat absorption in the evaporator for the evaporator heating surfaces, additionally determining for the at least one intermediate heating surface, an additional characteristic value for the heat absorption of the intermediate heating surface, and subtracting this additional characteristic value from the characteristic value characteristic of the heat absorption in the evaporator.
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