Browsing by Author "Nwele, Emmanuel Onyekachi"

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    Design and simulation of a controller scheme to mitigate process flow errors in oil and gas industry.
    (Federal University of Technology, Owerri, 2024-12) Nwele, Emmanuel Onyekachi
    Flow in a process industry is characterized with issue of frictional force in the medium in which the fluid is being transported thereby creating pressure loss which leads to loss of time and output product. In this research, Direct Synthesis(DS) method is used, while the tools used include: Proteus version 7.6, MATLAB/Simulink software, LabVIEW Control Design and Simulation Module. A Proportional Integral Derivative (PID) and Distributed Control System (DCS) controllers are utilized in order to control the flow rate of the process fluids by controlling the loss in pressure due to frictional forces in the transport medium to ensure that the flow remains in laminar condition. Firstly, the PID was modeled, and the PID controller was designed and configured into the flow system, then it was simulated using MATLAB/Simulink and the result of the performance showed that when the PID was independently controlling the flow system, there was over shoot which was over come after some wasteful time before achieving steady or stability. Secondly, DCS was also used independently in the flow loop and it was simulated using Proteus software. The performance was observed in the software environment and it showed that when DCS was used independently, it had a good control efficiency but some percentage of transient and overshoot was noticed from the output result. Thirdly, the DCS and the PID were installed together and simulated using LabVIEW and the results obtained showed that the cascading of the two controllers cut down the time of attaining stability and the problems of drag and pressure loss were eliminated in a very short time. The research work achieved 99 percent of the results anticipated as all the specific objectives were achieved. The research was validated using Routh- Hurwitz stability criterion.