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ÏÂÃæÊÇÎÄÏ×ÖйØÓÚʹÓÃÁéÃô¶È·ÖÎöÈ·¶¨¶àÑùÐԵķ½·¨£¬»ù±¾Òâ˼ÄÜ¿´¶®£¬µ«ÓÃaspenÄ£ÄâʱÓм¸µãÒÉÎÊ£º £¨1£©the option is selected that current results are used as initial estimates for the next stepÕâ¾äÊÇ˵ÔÚoptionalÀïÃæÑ¡Ôñ²»ÖØÐ³õʼ»¯Ä£¿éºÍÎïÁ÷Â𣿠£¨2£©only one operating parameter and the initial estimates are variableÊÇ˵¸Ä±ä·¶Î§µÄ×îСֵ£¬È»ºóµ÷ÕûÔöÁ¿Â𣿠ÓÐ×ö¹ýÕâ·½Ãæ¹¤×÷µÄ³æÓÑÂð£¬Çë²»Áߴͽ̣¬ÏÈÐÐл¹ý Secondly, sensitivity analysis is carried out to investigate the effects of operating parameters on column performance. As one of model analysis tools, sensitivity analysis provides a feasible method to find multiplicity in reactive distillation column. In the following studies, the option is selected that current results are used as initial estimates for the next step. In this case, only one operating parameter and the initial estimates are variable. Simulations are trivially converged to extreme (very low and very high) values of certain parameter at first, and then the parameter varies continuously with a small step towards the other extreme. If divergence occurs, the step size is reduced by half until the step size is small enough. The above simulation procedure is repeated for all possible operating parameters until all interesting cases are converged. After the solution curves are observed and analyzed, the multiplicity existence in the operating region can be determined. It is of interest to discuss why multiple steady states can be found by performing a sensitivity analysis. |
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