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  • Comparative functional analysis of different process simulators
    Goršek, Andreja, 1961- ; Manojlović, Milenko ; Glavič, Peter
    The chemical process industries are faced with an increasingly competitive environment, changing market conditions and government regulations; yet, they still must increase productivity and ... profitability. Process engineers are faced with challenges that range from the designing of new processes to evaluating and improving performance of existing plants while they address their business objectives. Experience alone is not always sufficient to answer the questions that continually arise - and "trial and error" efforts to provide meaningful insight are costly and potentially dangerous. Companies need the software that will enable them to develop that information and then build the models required to optimize enterprise performance. Steady state simulation is a powerful process engineering tool that enables engineers to simulate plant behavior and analyze their results rapidly by exploiting the latest software and engineering technology to optimize plant performance and profitability. But even when the mastery of process simulation software has been achieved, there are no guarantees that a completed, converged model will assure a technically realizable process (Schad, 1998). The most important aspect of the simulation is that the thermodynamic data of the chemicals should be modelled correctly. Given the wide variety of available thermodynamic models and unit operations libraries, thousands of built-in pure-component and interaction parameters, the ability of automatically estimating any missing physical properties and interaction parameters, the results obtained by different simulators still do not match and some of them do not reflect what process units are actually doing (Kister, 2001). Therefore, the computer results must be checked against experimental data to insure their validity before using data in more complicated computer calculations (Agarval et al., May 2001). Recent simulators (Aspen Plus, ChemCad, Design II, Hysys, Hysym, SuperPro Designer, etc.) are typical sequential-modular ones and they enable graphical representation of plant/process flowsheet. Despite some differences between all these simulators exist, their main function is quantitative understanding of processes, what makes our decisions about the process reliable. Most of the literature from this field is dealing with differences between computer simulations and process units actual performance. The aim of our work was to compare results of three different simulators (Aspen Plus, ChemCad and Hysys) to explain possible deviations and advice proper actions. Process stream data and process unit enthalpy flow rates of four chemical processes were the basis of our consideration.
    Vir: Congress manuscripts [Elektronski vir] (11 str.)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2005
    Jezik - angleški
    COBISS.SI-ID - 9725718

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