Drying Simulation the most effective way to save energy - deliberated discovering of potential energy reserves - effective check of changes in machine configuration - easy prove of extensive production conditions - convicting evaluation of energy savings 1
Process simulation the art of thinking Simulation of drying process as a tool - to minimise (upgrade) project risks - to learn process in difficult production conditions - to look for energy savings - to look for bottlenecks - for troubleshooting 2
History of Simulation of Paper Drying Lot of theoretical publications and practical trials solving specific tasks of drying process but: - - too theoretical to be generally used - solving specific tasks, not applicable to the other processes - connected with expensive training - not flexible enough for wide scope of applications 3
New approach to Drying Simulation The basic characteristic defined in 1997 - Capital imperative: easy to use - Versatility for wide scope of applications - Immediately understandable - Open for new know-how - Closed for user secrets (e.g. coating recipes) - No licence charges 4
DSfP- Drying Simulation for Papermaking Each mathematical model of drying equipment is defined by: - Equipment geometry, energy use and air conditions - Laws of physics and thermodynamics - Pre-tuned parameters using experience from real equipment - Published R&D works from European and American universities and institutions over the last 20 yeas - Published PhD works - More than 10 years research and development of DSP mathematical structure. 5
Just click on Icon of Equipment Library to configure own machinery 6
Just click on Icon from Drying Line to configure drying equipment 7
Just click on button to simulate drying process (over 40 MD profiles) 8
Just click on icon to display drying analysis with heat transfer details 9
Just click on icon to display quick, easy to understand Sankey diagrams 10
Just click on grade to choose coating composition from library 11
Easy to understand paper drying properties in graphical form 12
Example of usual drying configuration representing above 90% of drying machines 13
Using exhaust air of IR dryers in the Air Foil equipments and simultaneously keeping drying Air Foil conditions 14
Air Foil conditions before reconstruction 15
Air Foil conditions after reconstruction 16
Air Foils - gas savings 40,7% Coater - gas savings 16,8% 17
DSfP- Drying Simulation for Papermaking Validation and verification approach - DSfP checks the mass and heat balance of the model at every stage of the calculations. - Only real web temperature is used to validate DSfP performance. All other process variables are connected by thermodynamic laws. - Simulated overall water balance result is validated by scanner measurements. 18
Advantages and properties of DSfP DSfP is flexible, versatile, understandable and easy to use for: - - Clear base to communicate with customers or suppliers - Easy drying process analysis to optimise energy use - Tool for technological troubleshooting - Extremely quick functionality check of new equipment in drying line - Understandable and easy check of the energy efficiencies of all drying equipment 19
DSfP- Conclusion Process simulation is the art of thinking Thank you for your attention 20