Once-through evaporator systems
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United States of America Patent
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Feb 8, 2022
Grant Date -
Jun 13, 2019
app pub date -
Nov 19, 2018
filing date -
Dec 8, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
The present application provides a method of adjusting a feedwater mass flow rate to maintain a constant steam temperature in an evaporator section. The method may include the steps of determining a change in a number of operational parameters, predicting a change in steam temperature based on the number of operational parameters, combining the predicted changes in steam temperature, determining a feedforward signal based on dynamically offsetting the combined predicted changes in steam temperature, and changing the mass flow rate of feedwater based on the feedforward signal.
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