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I have attached the 3 element drum level control drawing, which I got from this site. But I have few doubts.
1. First of all what is the formula used to calculate the Pressure and temperature compensated steam flow.
2. What are the formulas used in the blocks LY1, FY1, FY2 and FY3.
3. Also as seen in figure, the pressure signal from PT2 is connected to FY2 and LY1. Connection to FY2 is for calculating compensated steam flow but why is PT2 signal connected to LY1.
If anybody has worked on any project involving 3 element drum level control, please help me by answering all my doubts and also can advice me on additional points to be considered in this matter.
Thanks,
Satish Salankimatt
1. First of all what is the formula used to calculate the Pressure and temperature compensated steam flow.
2. What are the formulas used in the blocks LY1, FY1, FY2 and FY3.
3. Also as seen in figure, the pressure signal from PT2 is connected to FY2 and LY1. Connection to FY2 is for calculating compensated steam flow but why is PT2 signal connected to LY1.
If anybody has worked on any project involving 3 element drum level control, please help me by answering all my doubts and also can advice me on additional points to be considered in this matter.
Thanks,
Satish Salankimatt