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Design og modellering af metanolanlæg til VEnzin-visionen Bilag

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17.142 SET_TEMP2<br />

U<strong>til</strong>lity component for setting the temperature by use of 2 control signals<br />

(ZC).<br />

17.142.1 Nodes<br />

Number of nodes: 4<br />

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

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

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

4. Temperature difference (Internal Number: 999) : control<br />

17.142.2 Equations<br />

Number of equations: 2<br />

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

2. Temperature: T = ZC(1)+ZC(2)<br />

17.142.3 Conditions<br />

m1 ˙ > 0<br />

m2 ˙ < 0<br />

17.142.4 Example<br />

struc set_temp SET_TEMP2 1 2 900 901<br />

media 1 STEAM<br />

addco p 1 1 m set_temp 1 60<br />

addco ZC 900 50 ZC 901 -10<br />

start t set_temp 1 60<br />

485

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