Based upon the nominal design of a divided wall column, one obtains the minimum energy usage to achieve the desired separation. During operation, when the column is actually run, the vapor split ratio Rv is found to be non-optimal. For this and other reasons, it is likely that available energy is actually lower than the energy required for the separation of three products. The objective of this study, is to find how to operate the column under such conditions, such that we minimize the degradation in terms of the product purities. We also want to study how the column should be controlled under such conditions. For this analysis various simulations have been conducted and the effects on product compositions are examined.
First placed on the market in 1939, the design of PID controllers remains a challenging area that requires new approaches to solving PID tuning problems while capturing the effects of noise and process variations. The augmented complexity of modern applications concerning areas like automotive applications, microsystems technology, pneumatic mechanisms, dc motors, industry processes, require controllers that incorporate into their design important characteristics of the systems. These characteristics include but are not limited to: model uncertainties, system's nonlinearities, time delays, disturbance rejection requirements and performance criteria. The scope of this book is to propose different PID controllers designs for numerous modern technology applications in order to cover the needs of an audience including researchers, scholars and professionals who are interested in advances in PID controllers and related topics.
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