two-phase flow and heat transfer
TRANSCRIPT
![Page 1: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/1.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
![Page 2: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/2.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
• Two-phase flow patterns.• Two-phase flow pattern transition maps.• Void fraction methods and measurements.• Two-phase pressure drop theory.• Condensation on external surfaces.• Condensation inside horizontal tubes.• Nucleate pool boiling and bundle boiling.• Evaporation inside tubes.• Thermal design methods.
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Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
• Course is based on new book that has just been published by J.R. Thome on the web: Engineering Databook III, available since September13, 2004 at http://www.wlv.com/productsthen clicking on Wolverine Databook III on that page.
• Chapters from book are available on website (for free) so print yourself.
• Other new chapters and publications may be added as needed and copies will be provided.
• Exercises will be assigned and solutions covered the following week.
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Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
Dates: Topic:
Sept. 15-23 Introduction, flow patterns and maps.Sept. 29-Oct.14 Void fraction, two-phase pressure drops.Oct. 20-28 External condensationNov. 3-11 Internal condensation.Nov. 17-Dec.2 Pool and internal boiling.Dec. 8-9 External boiling.Dec. 15-16 Power point presentation by students
Above schedule is approximate.
Course project will be the implementation of a two-phase flow and/or two-phase heat transfer model into a Matlab program, simulations and power point presentation to the class (respondingto questions) as the final exam.
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Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
• A background in single-phase heat transfer, fluidmechanics and heat exchanger design is assumed.
• Two-phase heat exchangers refers primarily to condensers and evaporators in their numerous forms.
• Two-phase heat exchangers are widely used in the power industry, petrochemical processing industry, air-conditioning and refrigeration industries, automotive climatization, food processing industries, high heat flux cooling applications, etc.
• Some examples of such exchangers and theirapplications are shown on the next slides.
• Electronics cooling is a new important application.
![Page 6: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/6.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
![Page 7: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/7.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
![Page 8: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/8.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
![Page 9: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/9.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
![Page 10: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/10.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
![Page 11: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/11.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
![Page 12: Two-Phase Flow and Heat Transfer](https://reader034.vdocuments.us/reader034/viewer/2022042600/586ccee51a28ab9c7d8c531f/html5/thumbnails/12.jpg)
Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
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Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
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Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
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Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
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Laboratoire de Transfert de Chaleur et de Masse
ECOLE POLYTECHNIQUEFEDERALE DE LAUSANNE
This course primarily focuses on the methodsused for designing two-phase heat exchangers:
• Heat transfer methods for evaporation.
• Heat transfer methods for condensation.
• Two-phase pressure drop design methods.
• Flow pattern types and maps.
• Void fraction prediction methods.