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Articles 61 - 90 of 205

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Metallic Micro Heat Exchangers: Properties, Applications And Long Term Stability, J.J. Brandner, W. Benzinger, U. Schygulla, S. Zimmermann, K. Schubert Jul 2007

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 Jul 2007

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 Jul 2007

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 …


Strouhal Numbers And Power Spectrums For Turbulent Fully-Developed Flows In Rectangular Ducts With Spatially-Periodic Interrupted-Plate Inserts, A. Lamoureux, L. Camargo, B.R. Baliga Sep 2005

Strouhal Numbers And Power Spectrums For Turbulent Fully-Developed Flows In Rectangular Ducts With Spatially-Periodic Interrupted-Plate Inserts, A. Lamoureux, L. Camargo, B.R. Baliga

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Keynote Lecture: Micro And Meso Scale Compact Heat Exchangers In Electronics Thermal Management – Review, Y. Joshi, X. Wei Sep 2005

Keynote Lecture: Micro And Meso Scale Compact Heat Exchangers In Electronics Thermal Management – Review, Y. Joshi, X. Wei

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Frost Formation On Thermally Conductive Plastic Plain Plate, J.S. Lee, S. Jhee, J.K. Park, J.S. Kim, K.S. Lee Sep 2005

Frost Formation On Thermally Conductive Plastic Plain Plate, J.S. Lee, S. Jhee, J.K. Park, J.S. Kim, K.S. Lee

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Keynote Lecture: Aspects Of Two-Phase Flow Distribution At Header-Channels Assembly, S. Y. Lee, J. K. Lee Sep 2005

Keynote Lecture: Aspects Of Two-Phase Flow Distribution At Header-Channels Assembly, S. Y. Lee, J. K. Lee

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Embedded Solid-State Cooling Layer Configurations In Power Electronics, J. Dirker, J.D. Van Wyk, J.P. Meyer Sep 2005

Embedded Solid-State Cooling Layer Configurations In Power Electronics, J. Dirker, J.D. Van Wyk, J.P. Meyer

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Effect Of Corrugation Angle On The Thermal Behaviour Of Power-Law Fluids During A Flow In Plate Heat Exchangers, C.S. Fernandes, R.P. Dias, J.M. Nóbrega, J.M. Maia Sep 2005

Effect Of Corrugation Angle On The Thermal Behaviour Of Power-Law Fluids During A Flow In Plate Heat Exchangers, C.S. Fernandes, R.P. Dias, J.M. Nóbrega, J.M. Maia

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Development Of A New Type Heat Exchanger For Natural Refrigerant Co2 Heat Pump Water Heaters, K. Kasai, Y. Shibata Sep 2005

Development Of A New Type Heat Exchanger For Natural Refrigerant Co2 Heat Pump Water Heaters, K. Kasai, Y. Shibata

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


A Fundamental Study On High Heat Flux Cooling Using Subcooled Flow Boiling With Microbubble Emission, K. Suzuki, R. Inagaki Sep 2005

A Fundamental Study On High Heat Flux Cooling Using Subcooled Flow Boiling With Microbubble Emission, K. Suzuki, R. Inagaki

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Performance Evaluation Of Wire Spring Fin For Compact Plate-Fin Heat Exchangers, H. Iwai, S. Kawakami, K. Suzuki, J. Tsujii, T. Abiko Sep 2005

Performance Evaluation Of Wire Spring Fin For Compact Plate-Fin Heat Exchangers, H. Iwai, S. Kawakami, K. Suzuki, J. Tsujii, T. Abiko

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Heat Exchangers In Process Industry And Mini-And Microscale Heat Transfer, V.V. Wadekar Sep 2005

Heat Exchangers In Process Industry And Mini-And Microscale Heat Transfer, V.V. Wadekar

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Compact Heat Exchangers For Microturbines, R.K. Shah Sep 2005

Compact Heat Exchangers For Microturbines, R.K. Shah

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Optimal Shape Design Of Counter-Flow Primary Surface Recuperators, K. Morimoto, Y. Suzuki, N. Kasagi Sep 2005

Optimal Shape Design Of Counter-Flow Primary Surface Recuperators, K. Morimoto, Y. Suzuki, N. Kasagi

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


An Experimental Investigation Of The Port To Channel Flow And Pressure Distribution Of The Smaller And Larger Plate Package Heat Exchangers, B. P. Rao, B. Sunden, S. K. Das Sep 2005

An Experimental Investigation Of The Port To Channel Flow And Pressure Distribution Of The Smaller And Larger Plate Package Heat Exchangers, B. P. Rao, B. Sunden, S. K. Das

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Keynote Lecture: Role Of Computational Fluid Dynamics (Cfd) Studies In The Design Of Compact Heat Exchangers, P. Nithiarasu Sep 2005

Keynote Lecture: Role Of Computational Fluid Dynamics (Cfd) Studies In The Design Of Compact Heat Exchangers, P. Nithiarasu

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Simulation Of Formation Mechanisms And Transport Of Longitudinal Vortices In 3d Boundary Layer, K. Khallaki, S. Russeil, B. Baudoin Sep 2005

Simulation Of Formation Mechanisms And Transport Of Longitudinal Vortices In 3d Boundary Layer, K. Khallaki, S. Russeil, B. Baudoin

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


High Temperature Compact Heat Exchangers: Performance Of Advanced Metallic Recuperators For Power Plants, D. Aquaro, M. Pieve Sep 2005

High Temperature Compact Heat Exchangers: Performance Of Advanced Metallic Recuperators For Power Plants, D. Aquaro, M. Pieve

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Keynote Lecture: Developments In Falling Film Type (Downflow) Reboilers In The Air Separation Industry, V.S. Chakravarthy, R.J. Jibb, J.H. Royal, M.J. Lockett Sep 2005

Keynote Lecture: Developments In Falling Film Type (Downflow) Reboilers In The Air Separation Industry, V.S. Chakravarthy, R.J. Jibb, J.H. Royal, M.J. Lockett

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


A Novel Type Of All-Stainless Steel Plate Heat Exchanger, P. Sjödin, C. Wolfe, B. Wilhelmsson Sep 2005

A Novel Type Of All-Stainless Steel Plate Heat Exchanger, P. Sjödin, C. Wolfe, B. Wilhelmsson

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Experimental Results With Novel Plasma Coated Tubes In Compact Tube Bundles, D. Schäfer, R. Tamme, H. Müller-Steinhagen, M. Müller Sep 2005

Experimental Results With Novel Plasma Coated Tubes In Compact Tube Bundles, D. Schäfer, R. Tamme, H. Müller-Steinhagen, M. Müller

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


The Use Of Compact Heat Exchangers In Heat-Integrated Distillation Columns, J.A. Hugill, E.M. Van Dorst Sep 2005

The Use Of Compact Heat Exchangers In Heat-Integrated Distillation Columns, J.A. Hugill, E.M. Van Dorst

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Gravity Effect On The Distribution Of Refrigerant Flow In A Multi-Circuited Condenser, J. Lee , M.H. Kim Sep 2005

Gravity Effect On The Distribution Of Refrigerant Flow In A Multi-Circuited Condenser, J. Lee , M.H. Kim

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Two-Phase Flow Across Small Diameter U-Type Junctions, I. Y. Chen, C. W. Tsai, B. C. Yang, C.C. Wang Sep 2005

Two-Phase Flow Across Small Diameter U-Type Junctions, I. Y. Chen, C. W. Tsai, B. C. Yang, C.C. Wang

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


An Experimental Study Of Louver-Fin Flat-Tube Heat Exchanger Performance Under Frosting Conditions, Y. Zhong, A. M. Jacobi Sep 2005

An Experimental Study Of Louver-Fin Flat-Tube Heat Exchanger Performance Under Frosting Conditions, Y. Zhong, A. M. Jacobi

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Heat Transfer And Fluid Flow In A Constructal Heat Exchanger, V.A.P. Raja, T. Bassak, S. K. Das Sep 2005

Heat Transfer And Fluid Flow In A Constructal Heat Exchanger, V.A.P. Raja, T. Bassak, S. K. Das

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Condensation From Gas-Vapour Mixtures In Small Non-Circular Tubes, S. Krishnaswamy, H. S. Wang, J. W. Rose Sep 2005

Condensation From Gas-Vapour Mixtures In Small Non-Circular Tubes, S. Krishnaswamy, H. S. Wang, J. W. Rose

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Boiling From A Super-Water-Repellent Surface, Y. Takata, S. Hidaka, M. Kohno Sep 2005

Boiling From A Super-Water-Repellent Surface, Y. Takata, S. Hidaka, M. Kohno

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.


Cover Page, Ramesh K. Shah (Editor) Sep 2005

Cover Page, Ramesh K. Shah (Editor)

Enhanced, Compact and Ultra-Compact Heat Exchangers: Science, Engineering and Technology

No abstract provided.