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Design og modellering af metanolanlæg til VEnzin-visionen Bilag

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17.143 SET_PRES<br />

U<strong>til</strong>lity component for converting the pressure to a control signal (ZC). The<br />

component can therefore be used for measuring or setting the pressure<br />

17.143.1 Nodes<br />

Number of nodes: 3<br />

1. Fluid in (Internal Number: -3) : any fluid (I/V)<br />

2. Fluid out (Internal Number: -3) : any fluid (I/V)<br />

3. Pressure (Internal Number: 999) : control<br />

17.143.2 Equations<br />

Number of equations: 2<br />

1. Equal pressures: p1 = p2<br />

2. Pressure: p1 = ZC(1)<br />

17.143.3 Conditions<br />

m1 ˙ > 0<br />

m2 ˙ < 0<br />

17.143.4 Example<br />

struc set-pres SET_PRES 635 636 990<br />

MEDIA 635 STEAM<br />

addco t set-pres 635 50 m set-pres 635 1 p 635 1<br />

486

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