On PDE Solution in Transient Optimization of Gas Networks
نویسنده
چکیده
Operative planning in gas distribution networks leads to large-scale mixedinteger optimization problems involving a hyperbolic P D E defined on a graph. We consider the N L P obtained under prescribed combinatorial decisions—or as relaxation in a branch and bound framework, addressing in particular the K K T systems arising in primal-dual interior methods. We propose a custom solution algorithm using sparse local projections, based on the K K T systems’ structural properties induced by the discretized gas flow equations in combination with the underlying network topology. The numerical efficiency and accuracy of the algorithm are investigated, and detailed computational comparisons with a control space method and with the multifrontal solver MA27 are provided.
منابع مشابه
Optimization of gas tungsten arc welding (GTAW) to develop the NiAl coating using neural networks and genetic algorithm
In this research, artificial neural network (ANN) and genetic algorithm (GA) were used in order to produce and develop the NiAl intermetallic coating with the best wear behavior and the most value of hardness. The effect of variations of current, voltage and gas flow on the hardness and wear resistance were optimized by ANN and GA. In the following, the optimum values of current, voltage and g...
متن کاملOptimization of gas tungsten arc welding (GTAW) to develop the NiAl coating using neural networks and genetic algorithm
In this research, artificial neural network (ANN) and genetic algorithm (GA) were used in order to produce and develop the NiAl intermetallic coating with the best wear behavior and the most value of hardness. The effect of variations of current, voltage and gas flow on the hardness and wear resistance were optimized by ANN and GA. In the following, the optimum values of current, voltage and g...
متن کاملTransient Measurement Site Design in pipe networks using the Decision Table Method (DTM)
The accuracy of leak detection and calibration of pipe networks by means of the inverse transient analysis (ITA) is highly affected by the number and location of the measurement sites. This study introduces a conceptual decision-making model, the Decision Table Method (DTM), for the measurement site design of pipe networks with the aim of inverse transient analysis. Through the Decision Table M...
متن کاملA mathematical model for designing optimal urban gas networks, an ant colony algorithm and a case study
Considering the high costs of the implementation and maintenance of gas distribution networks in urban areas, optimal design of such networks is vital. Today, urban gas networks are implemented within a tree structure. These networks receive gas from City Gate Stations (CGS) and deliver it to the consumers. This study presents a comprehensive model based on Mixed Integer Nonlinear Programming (...
متن کاملModeling and Multi-Objective Optimization of Stall Control on NACA0015 Airfoil with a Synthetic Jet using GMDH Type Neural Networks and Genetic Algorithms
This study concerns numerical simulation, modeling and optimization of aerodynamic stall control using a synthetic jet actuator. Thenumerical simulation was carried out by a large-eddy simulation that employs a RNG-based model as the subgrid-scale model. The flow around a NACA0015 airfoil, including a synthetic jet located at 10 % of the chord, is studied under Reynolds number Re = 12.7 × 106 a...
متن کامل