Because of their potential energy savings, dividing-wall columns (DWCs) have been viewed as an interesting alternative to the use of sequences based on conventional distillation columns. The energy savings, however, must be supported by suitable controllability properties for a proper operation. In this study we use a design methodology to optimize the gains of the Takagi−Sugeno fuzzy controlle...

The technology of dividing wall columns offers the possibility to save energy and investment costs compared to conventional distillation columns and their configurations. The practical use of the technology is still limited due to a lack of experience and high interactions between the process variables. The contribution focuses on a new developed appliance, named ConStruct DWC, for the model ba...

If you live in an apartment or a house, will notice that your home has different rooms separated by walls. A plant is just like home, except there are many small rooms, called cells. Plant cells, also cell Cell walls unique and not found animal In building, if want to turn one large room into two build new wall divide it. This similar how divides cells during division. To need employ constructi...

The authors realize a 50% length reduction of short-slot couplers in a post-wall dielectric substrate by two techniques. One is to introduce hollow rectangular holes near the side walls of the coupled region. The difference of phase constant between the TE10 and TE20 propagating modes increases and the required length to realize a desired dividing ratio is reduced. Another is to remove two refl...

A numerical model is developed to quantify the effects of hydrodynamics on heat and mass transfer during an absorption, for a laminar film flowing over a wavy wall column. First of all, the modelling is written for a single wave of the wall shape. Then, an experimental set up, composed of a CCD video camera, validates this model. Finally, the model is extended to an entire column. The results i...

Environmental protection agencies have begun imposing stringent regulations on the existing refineries to control levels of gasoline additives. In this context, a novel compound, 2-methoxy-2-methylheptane (MMH), had drawn attention as fuel additive for cleaner combustion. The conventional process MMH production features three distillation columns in direct sequence. These are used maintain requ...

In this work, closed-form expressions for the buckling loads of a weakened column with different boundary conditions are presented. The cracked-column model is based on the well-known method consisting of dividing the column into two segments connected by a rotational linear spring whose flexibility is related to the crack size and the geometry of the cross section. For the formulation of close...