Plant-wide dynamic and static optimisation of supermarket refrigeration systems

Torben Green, Roozbeh Izadi-Zamanabadi, Roozbeh Razavi-Far, Hans Henrik Niemann

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    Abstract

    Optimising the operation of a supermarket refrigeration system under dynamic as well as steadystate conditions is addressedin thispaper. For thispurpose anappropriateperformance function that encompasses food quality, system efficiency, and also component reliability is established. The choice of setup parameters, which are necessary for system performance optimisation, depends on whether the system operates under steady state or dynamic conditions. While operating under steady state conditions, the total systemperformance is shown to predominantly be influenced by the suction pressure. The dynamic optimisation requires use of dedicated excitation signals. Amethod for designing such signals under realistic operational conditions is proposed. A derivative free optimisation technique based on Invasive Weed Optimisation (IWO) is utilised to optimise the parameters of the controllers in the system. Simulation results is used to substantiate the suggestedmethodology.
    Original languageEnglish
    JournalInternational Journal of Refrigeration
    Volume38
    Pages (from-to)106-117
    Number of pages12
    ISSN0140-7007
    DOIs
    Publication statusPublished - 2013

    Keywords

    • Control
    • Refrigeration systems
    • Active system monitoring
    • Performance optimization
    • Performance assessment

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