4 research outputs found
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Round robin for glass tank models : Report of the International Commission on Glass (ICG) Technical Committee 21 "Modelling of Glass Melts"
Different numerical and physical models for glass tanks were compared by a simple round robin. Most models produced qualitatively similar velocity and temperature distributions. The minimum residence time of tracers in numerical models gave similar values too, but differed to the physical scale model. An explanation for this is the different kind of batch modelling in both methods of Simulation. Especially the velocity vectors at some fixed test points showed larger deviations. In regions with steep gradients small variations in the local flow distribution can lead to large changes at fixed test points. These differences therefore should not be rated very high
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Supervisory advanced control of glass melters and forehearths by the GS expert system
Advanced control is one of the most important tools to increase glass quality and production in existing furnaces. This paper describes a method of how advanced control has been applied in glass industry. Practical experience of an advanced control system called EXPERTSystem II is shown and explained. The present state of control in the glass industry is relatively poor compared to other chemical industries, therefore the potential increase in benefits by advanced control systems is very high for the glass production system
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Upgrading glass melting technology by model-based processing
[no abstract available
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Advanced melter operation and training tool
Glass Service Inc. uses the GS Glass Furnace Model as a base for a glass furnace simulator. It contains a user-friendly graphical front end, a simplified version of a furnace operation station, that allows modifying furnace settings (batch charging rate and properties, setup of bubblers, coolers, fuel profile, etc.). Behind this user interface, coupled glass and combustion models are run. The output of these calculations (shown again as a set of operator-friendly control screens) displays temperatures in positions where thermocouples and pyrometers are located in reality, exhaust gas properties, glass flow patterns, location of spring zone, quality indices, etc. The simulator has been validated and shows good agreement with reality