Optimal Operation and Control of Divided Wall Column

Author(s):  
Ambari Khanam ◽  
Mohammad Shamsuzzoha ◽  
Sigurd Skogestad
Author(s):  
Stella Kampezidou ◽  
Orestis Vasios ◽  
Sakis Meliopoulos

Author(s):  
Alejandro Hinojosa Marti´nez ◽  
Jose Ramon Vega-Galaz ◽  
Herminia Diaz de Leon

Cimplicity is a Human-Machine interface software which acquires data from CNCs Robots and PLGs, data is then visualized on real time by an operator in a Cimplicity screen on a PC monitor. This software lets the operator perform operations, monitor and control status in a factory in an easy, natural, and intuitive way. This paper will focus on the use of Cimplicity HMI and Microsoft Excel in COMONSA, a cogeneration plant designed and installed by SEISA (International Energy Systems). The cogeneration plant is localized in Monclova, Coahuila, Mexico. This plant supplies energy and, heat to a metal manufacturing factory called INMAGUSA. In this case Cimplicity acquires data from a PLC connected to two reciprocating Engines, which are responsible of supplying heat and electrical energy to the factory, and other auxiliary devices that keep the cogeneration plant running. Cimplicity transforms the data received by the PLC and then displays it on screens while it is being stored on Excel sheets in predefined time intervals. A total of 1093 variables are displayed in 70 different screens. This paper will center on the variables, screens and programs created by the authors. Screens created for the purpose of making the process of invoicing easier for SEISA, for monitoring daily kWh and monthly factory consumption. And two algorithms programmed using Microsoft Visual Basic to facilitate optimal operation of the cogeneration plant.


2000 ◽  
Vol 33 (10) ◽  
pp. 497-502
Author(s):  
Alessandro Del Seppia ◽  
Daniele Semino ◽  
Alessandro Brambilla

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1930
Author(s):  
Se-Hyeok Choi ◽  
Akhtar Hussain ◽  
Hak-Man Kim

An optimal operation scheme for a building microgrid with a rooftop greenhouse in islanded mode is proposed in this paper. In islanded mode, the fulfillment of entire demand is challenging due to the absence of connection with the utility grid and the scarcity of local resources. The situation becomes more challenging when one or more pieces of equipment fail during the islanded mode. Therefore, in addition to islanded mode operation, component outage and recovery are also considered in this paper. In order to use the available energy efficiently, prioritization of building loads and control parameters of the greenhouse are proposed. A priority weight matrix is adopted to decide the supply of energy to fulfill the requirements of control parameters in the case of insufficient energy. In addition to the normal operation bounds, new bounds are defined to operate the control parameters if the resources are not sufficient. Additional penalties are imposed if the new bounds are chosen, due to violation of the normal operation range. The microgrid system is rescheduled if any component outage or recovery is detected from the outage point to the end of the scheduling horizon. The performance of the proposed method is evaluated by carrying out several simulations including component outage, component recovery, and simultaneous outage of two or more types of equipment. Numerical simulation results have demonstrated the effectiveness of the proposed operation scheme for optimal operation of building microgrids with a rooftop greenhouse in islanded mode.


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