The Experts below are selected from a list of 1110 Experts worldwide ranked by ideXlab platform
Mohd Faisal Ibrahim - One of the best experts on this subject based on the ideXlab platform.
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Fuzzy modelling and control for a nonlinear Reboiler System of a distillation column
2006Co-Authors: Mohd Faisal IbrahimAbstract:Most process control Systems are complex and nonlinear in nature. To design a good controller for these Systems, accurate models are needed. Most of the available conventional plant modelling techniques cater linear plants and therefore in most cases, inaccurate nonlinear plant models are obtained which in turn resulted in poor control performance. In view of this, the thesis explored the Fuzzy modelling technique based on Takagi-Sugeno (TS) method for modelling a Reboiler System of a distillation column. Model parameters are tuned using Genetic algorithm (GA) and Recursive least square (RLS). The Unbiasedness criterion (UC) is applied for structure identification. Data from simulation System that represents the actual plant is used in model development. Fuzzy model obtained using the proposed technique is compared with various other modelling techniques such as the conventional Fuzzy model and linear model. The result shows that the technique proposed gives a more accurate model as compared to the other methods. The optimized Fuzzy model obtained is used to design a Fuzzy controller for the temperature control of the vessel of the distillation column. Manipulated variables for the Fuzzy controller are heat from electrical heater and flowrate of silicon oil in the Reboiler System. Genetic algorithm (GA) is used to tune the parameters of the Fuzzy controller. The performance of the Fuzzy controller using the optimized Fuzzy model is better than using the linear model
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Fuzzy modelling for Reboiler System
2004 IEEE Region 10 Conference TENCON 2004., 2004Co-Authors: Rubiyah Yusof, Mohd Faisal Ibrahim, Marzuki KhalidAbstract:Fuzzy System's ability of providing both heuristic knowledge with quantitative and accurate representation has been exploited for identification of nonlinear and complex System. Takagi-Sugeno (TS) fuzzy System is one of the most popular method used for fuzzy modelling of multi input multi output (MIMO) dynamical System. In this paper, we propose an automatic tuning methods of fuzzy sets for TS fuzzy models using genetic algorithms. The effectiveness of the approach is illustrated by applying the method to a Reboiler of batch distillation column. The results show that the proposed System gives a more accurate model than the conventional TS fuzzy model.
Marzuki Khalid - One of the best experts on this subject based on the ideXlab platform.
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Fuzzy modelling for Reboiler System
2004 IEEE Region 10 Conference TENCON 2004., 2004Co-Authors: Rubiyah Yusof, Mohd Faisal Ibrahim, Marzuki KhalidAbstract:Fuzzy System's ability of providing both heuristic knowledge with quantitative and accurate representation has been exploited for identification of nonlinear and complex System. Takagi-Sugeno (TS) fuzzy System is one of the most popular method used for fuzzy modelling of multi input multi output (MIMO) dynamical System. In this paper, we propose an automatic tuning methods of fuzzy sets for TS fuzzy models using genetic algorithms. The effectiveness of the approach is illustrated by applying the method to a Reboiler of batch distillation column. The results show that the proposed System gives a more accurate model than the conventional TS fuzzy model.
Rubiyah Yusof - One of the best experts on this subject based on the ideXlab platform.
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Fuzzy modelling for Reboiler System
2004 IEEE Region 10 Conference TENCON 2004., 2004Co-Authors: Rubiyah Yusof, Mohd Faisal Ibrahim, Marzuki KhalidAbstract:Fuzzy System's ability of providing both heuristic knowledge with quantitative and accurate representation has been exploited for identification of nonlinear and complex System. Takagi-Sugeno (TS) fuzzy System is one of the most popular method used for fuzzy modelling of multi input multi output (MIMO) dynamical System. In this paper, we propose an automatic tuning methods of fuzzy sets for TS fuzzy models using genetic algorithms. The effectiveness of the approach is illustrated by applying the method to a Reboiler of batch distillation column. The results show that the proposed System gives a more accurate model than the conventional TS fuzzy model.
Steve White - One of the best experts on this subject based on the ideXlab platform.
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steam Reboiler System operations
Petroleum technology quarterly, 2004Co-Authors: Ken Weston, Steve WhiteAbstract:Basic heat exchange principles are used to explain gas plant thermosiphon Reboiler hydraulic constraints. Field measurements help clarify "off-design" operations that were not apparent and were causing high condensate levels
D. H. Cruz - One of the best experts on this subject based on the ideXlab platform.
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Geothermal noncondensable gas removal from turbine inlet steam
IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference, 1996Co-Authors: G. Cory, H. V. Guillen, D. H. CruzAbstract:Noncondensable gas (NCG), which is always present in geothermal steam, causes power plant inefficiencies that result in increased steam consumption and higher plant costs. In many steam fields over the world, the NCG content exceeds 5%w in the steam, a level at which steam consumption and costs increase rapidly as a function of the NCG concentration. Steam rates increase as the NCG level rises because of two factors. First, the steam jet ejectors and vacuum pumps that evacuate NCG from the turbine-condenser require more steam and electric power for their operation. Second, higher gas levels lead to a higher condenser pressure (that is, a higher turbine outlet pressure), thus yielding a lower power output per unit of steam feeding the turbine. The costs of the cooling water System, and parasitic power losses within the circulating pump and tower fans, increase. These problems can be alleviated when a Reboiler System is used for steam cleaning that is, the Reboiler System removes NCG from steam upstream of the turbine. This is accomplished with a simple, standard heat exchanger (the Reboiler) within which geothermal steam is condensed and its NCG components are discharged. The heat of condensation is used to produce NCG-free steam by evaporation of clean water. The source of clean water is the same condensate recovered from condensing steam. The Reboiler System design and operation is described, and then applied to the Botong geothermal plant on Luzon in the Philippines. The reduction in steam rate and cooling water usage is summarized
