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The load dependent multivariable steam temperature control system in a boiler

✍ Scribed by H. Unbehauen

Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
794 KB
Volume
5
Category
Article
ISSN
0005-1098

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✦ Synopsis

Le syst6me de r6glage de temp6rature de la vapeur dans une chaudi6re d6pendant de le charge et/t variables multiples Das lastabh~ingige mehrvariable Dampftemperaturregelungssystem in einem Dampferzeuger CHCTeMa pery:IHpoBanI4a TeMnepaTypbI riapa B roT~e a 3aBHCHMOCTH OT Harpy3104 ~I C MHOFIIMI, I rIepeMeHHbIMI4 H. UNBEHAUENt

Stability and optimal controller settings of the temperature control system of a boiler are strongly load dependent. This is shown in a mathematical model of an operating drum-boiler.

Stmamary--The live steam temperature control of a steam generator is coupled with other control loops and describes a multivariable control system. The dynamic behaviour of this system is strongly load dependent. Therefore the stability limits and also the optimal controller settings change considerably with the load. In the present paper this behaviour is investigated for a 100 t/hr+* drum boiler. For a PI-controller normally used for such a task one finds the controller time constant to be nearly inversely proportional to load, whereas the gain factor of the controller decreases insignificantly with decreasing load.

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