Good morning,

We want to install three element control in boiler drum level control. We have to maintain steam flow and water flow ratio at 1.11 and drum level at 50% level. Steam flow and drum level summation gives set point to water flow controller which operates feed water control valve. What is the best equation for the cascade control we should maintain? Steam flow and water flow ratio may vary to 1.2.

 

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Dick Caro
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Richard H. Caro, Certified Automation Professional, CEO, CMC Associates,
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