Vertical Downflow Condensation Heat Transfer in Gas-steam Mixtures PDF Download
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Author: Daniel Grant Ogg
Publisher:
ISBN:
Category :
Languages : en
Pages : 308
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Author: Daniel Grant Ogg
Publisher:
ISBN:
Category :
Languages : en
Pages : 308
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Author: Jack H. Goodykoontz
Publisher:
ISBN:
Category : Condensers (Steam)
Languages : en
Pages : 50
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Author: Takao Kageyama
Publisher:
ISBN:
Category :
Languages : en
Pages : 268
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Author: Benigno Robert Loya
Publisher:
ISBN:
Category : Condensers (Steam)
Languages : en
Pages : 90
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Book Description
Author: Shine-Zen Kuhn
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 732
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Previous experiments have been carried out by Vierow, Ogg, Kageyama and Siddique for condensation from steam/gas mixtures in vertical tubes. In each case the data scatter relative to the correlation was large and there was not close agreement among the three investigations. A new apparatus has been designed and built using the lessons learned from the earlier studies. Using the new apparatus, an extensive new data base has been obtained for pure steam, steam-air mixtures and steam-helium mixtures. Three different correlations, one implementing the degradation method initially proposed by Vierow and Schrock, a second diffusion layer theory initially proposed by Peterson, and third mass transfer conductance model are presented in this paper. The correlation using the simple degradation factor method has been shown, with some modification, to give satisfactory engineering accuracy when applied to the new data. However, this method is based on very simplified arguments that do not fully represent the complex physical phenomena involved. Better representation of the data has been found possible using modifications of the more complex and phenomenologically based method which treats the heat transfer conductance of the liquid film in series with the conductance on the vapor-gas side with the latter comprised of mass transfer and sensible heat transfer conductance acting in parallel. The mechanistic models, based on the modified diffusion layer theory or classical mass transfer theory for mass transfer conductance with transpiration successfully correlate the data for the heat transfer of vapor-gas side. Combined with the heat transfer of liquid film model proposed by Blangetti, the overall heat transfer coefficients predicted by the correlations from mechanistic models are in close agreement with experimental values.
Author: Karl Stephan
Publisher: Springer Science & Business Media
ISBN: 3642524575
Category : Technology & Engineering
Languages : en
Pages : 342
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Book Description
I welcome the opportunity to have my book translated, because of the great emphasis on two-phase flow and heat transfer in the English-speaking world, as related to research, university education, and industrial practice. The 1988 Springer-Verlag edition of "Warmeiibergang beim Kondensieren und beim Sieden" has been enlarged to include additional material on falling film evaporation (Chapter 12) and pressure drop in two-phase flow (Chapter 13). Minor errors in the original text have also been corrected. I would like to express my sincere appreciation to Professor Green, Asso ciate Professor of German at Rensselaer, for his excellent translation and co operation. My thanks go also to Professor Bergles for his close attention to technical and linguistic details. He carefully read the typescript and made many comments and suggestions that helped to improve the manuscript. I hope that the English edition will meet with' a favorable reception and contribute to better understanding and to progress in the field of heat transfer in condensation and boiling. February 1992 K. Stephan Preface to the German-Language Edition This book is a continuation of the series "Heat and Mass Transfer" edited by U. Grigull, in which three volumes have already been published. Its aim is to acquaint students and practicing engineers with heat transfer during condensa tion and boiling, and is intended primarily for students and engineers in mechanical, chemical, electrical, and industrial processing engineering.
Author: Ruey Yng Yuann
Publisher:
ISBN:
Category :
Languages : en
Pages : 432
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Author: Karen Marie Vierow
Publisher:
ISBN:
Category :
Languages : en
Pages : 474
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Author: Geoffrey Robert Golub
Publisher:
ISBN:
Category :
Languages : en
Pages : 512
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