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Full-Text Articles in Industrial Engineering
Metallic Micro Heat Exchangers: Properties, Applications And Long Term Stability, J.J. Brandner, W. Benzinger, U. Schygulla, S. Zimmermann, K. Schubert
Metallic Micro Heat Exchangers: Properties, Applications And Long Term Stability, J.J. Brandner, W. Benzinger, U. Schygulla, S. Zimmermann, K. Schubert
Heat Exchanger Fouling and Cleaning VII
Micro heat exchangers, which until recently have been implemented only at laboratory scale, are now being available for industrial applications. They are well known for their superior heat transfer properties due to the large surface-to-volume ratio. But there are little data available on the long term stability of these devices. In this paper application several application examples for micro heat exchangers made of stainless steel are presented. The devices consist of stainless steel foils providing numerous micro channels generated by mechanical micromachining or wet chemical etching. A number of the foils are arranged in a specific way and bonded together. …
Fouling Monitoring And Cleaning Optimisation In A Heat Exchanger Network Of A Crude Distillation Unit, Andrea Heins, Ramón Veiga, Carlos Ruiz, Andrés Riera
Fouling Monitoring And Cleaning Optimisation In A Heat Exchanger Network Of A Crude Distillation Unit, Andrea Heins, Ramón Veiga, Carlos Ruiz, Andrés Riera
Heat Exchanger Fouling and Cleaning VII
Fouling in preheat networks of crude distillation units (CDU) plays an important role in energy consumption. In this work a procedure to monitor the performance of the heat exchanger network (HEN) and to optimize the cleaning strategies is presented. The procedure is based on a rigorous simulation of the HEN using Hysys (from Aspen Technology). The simulation is used to estimate the service overall heat transfer coefficient with real operational data acquired from the unit’s Plant Information System (PI). The clean overall heat transfer coefficient is calculated for each one of the individual heat exchangers with a rigorous simulation using …
Cfd And Neural Network-Based Expert System For The Supervision Of Boilers And Furnaces, Hugo Calisto, Nelson Martins, Naim Afgan
Cfd And Neural Network-Based Expert System For The Supervision Of Boilers And Furnaces, Hugo Calisto, Nelson Martins, Naim Afgan
Heat Exchanger Fouling and Cleaning VII
CFD (Computational Fluid Dynamics) tools were used to build a "virtual" furnace, validated with experimental data. This model was used to simulate both normal and “faulty” behaviours, regarding parameters such as energy conversion efficiency, steam leakage and fouling. A database was developed comprising normal situations and simulated fault sets, characterized by virtual sensor outputs used in the evaluation of diagnostic parameters patterns to be processed and recognized by the diagnostic system. The database was processed using Neural Networks, with satisfactory results even in their most simple form (backpropagation networks) trained using standard algorithms. Pattern recognition was thus performed, identifying root …