Marius Store Govatsmark

Learn More
We consider control structure selection, with emphasis on “what to control”, for a simple plant with a liquid-phase reactor, a distillation column, and recycle of unreacted reactants. Plants of this kind have been studied extensively in the plantwide control literature. Our starting point is a clear definition of the operational objectives, constraints, and(More)
This paper describes the application of self-optimizing control to a large-scale process, the HDA plant. The idea is to select controlled variables which when kept constant lead to minimum economic loss. First, the optimal active constraints need to be controlled. Next, controlled variables need to be found for the remaining unconstrained degrees of(More)
The main reason for using a distillation column equipped with a heat pump to integrate the reboiler and cooler duty is to save energy and thus reducing operating costs. In this paper we compare the effect on economics and control properties for a single column and a column integrated with a heat pump. Separation of products from an ethanol fermentation(More)
This paper describes the application of self-optimizing control to a large scale process, the HDA plant. The idea is to select controlled variables which when kept constant lead to minimum economic loss. In order to avoid the combinatorial problem common to the selection of outputs/measurements for such large plants, applications of singular value(More)
In this paper we apply a plant-wide control design procedure presented by Larsson and Skogestad (Larsson & Skogestad 2001) to a distillation column heat-integrated by using a heatpump. Top-down analysis is performed to select primary controlled variables (based on ideas of self-optimizing control) and bottlenecks. Bottom-up design is performed to design the(More)
  • 1