An adaptive control strategy was developed for an 18-stage multistage flash (MSF) desalination plant presently operating in the Arabian Gulf region. The parameter-scheduling strategy maintains optimality of PID controllers over the operating region and is derived by simulation using a detailed phenomenological dynamic model. An optimal method of reducing the model into first-order dead-time form and a non-parametric model-based simulation facility are presented. Based on a relative gain array analysis, an appropriate control structure has been established. A number of integral performance criteria have been used, without resorting to the use of a reduced model, directly with the non-parametric simulation facility for optimal controller tuning. The controller parameters are given as a vector function of the top brine temperature (TBT) and the brine recycle flow rate, which are key variables for the TBT control.


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    Title :

    An adaptive scheme with an optimally tuned PID controller for a large MSF desalination plant


    Additional title:

    Ein adaptives Regelungsschema mit einem optimal eingestellten PID-Regler für eine große Meerwasserentsalzungsanlage mit mehreren Verdampfereinheiten


    Contributors:
    Woldai, A. (author) / Al-Gobaisi, D.M.K. (author) / Dunn, R.W. (author) / Kurdali, A. (author) / Rao, G.P. (author)

    Published in:

    Publication date :

    1996


    Size :

    14 Seiten, 14 Bilder, 3 Tabellen, 15 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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