Condensation from Vapor-gas Mixture for Forced Downflow Inside a Tube PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Condensation from Vapor-gas Mixture for Forced Downflow Inside a Tube PDF full book. Access full book title Condensation from Vapor-gas Mixture for Forced Downflow Inside a Tube by Ruey Yng Yuann. Download full books in PDF and EPUB format.
Author: Ruey Yng Yuann
Publisher:
ISBN:
Category :
Languages : en
Pages : 432
Get Book Here
Book Description
Author: Ruey Yng Yuann
Publisher:
ISBN:
Category :
Languages : en
Pages : 432
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 25
Get Book Here
Book Description
Laminar film condensation is the dominant heat transfer mode inside tubes. In the present paper direct numerical simulation of the detailed transport process within the steam-gas core flow and in the condensate film is carried out. The problem was posed as an axisymmetric two dimensional (r, z) gas phase inside an annular condensate film flow with an assumed smooth interface. The fundamental conservation equations were written for mass, momentum, species concentration and energy in the gaseous phase with effective diffusion parameters characterizing the turbulent region. The low Reynolds number two equation [kappa]-[epsilon] model was employed to determine the eddy diffusion coefficients. The liquid film was described by similar formulation without the gas species equation. An empirical correlation was employed to correct for the effect of film waviness on the interfacial shear. A computer code named COAPIT (Condensation Analysis Program Inside Tube) was developed to implement numerical solution of the fundamental equations. The equations were solved by a marching technique working downstream from the entrance of the condensing section. COAPIT was benchmarked against experimental data and overall reasonable agreement was found for the key parameters such as heat transfer coefficient and tube inner wall temperature. The predicted axial development of radial profiles of velocity, composition and temperature and occurrence of metastable vapor add insight to the physical phenomena.
Author: Daniel Grant Ogg
Publisher:
ISBN:
Category :
Languages : en
Pages : 308
Get Book Here
Book Description
Author: Shine-Zen Kuhn
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 732
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Get Book Here
Book Description
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:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 836
Get Book Here
Book Description
Author: Hans Dieter Baehr
Publisher: Springer Science & Business Media
ISBN: 3540295275
Category : Science
Languages : en
Pages : 706
Get Book Here
Book Description
This book provides a solid foundation in the principles of heat and mass transfer and shows how to solve problems by applying modern methods. The basic theory is developed systematically, exploring in detail the solution methods to all important problems. The revised second edition incorporates state-of-the-art findings on heat and mass transfer correlations. The book will be useful not only to upper- and graduate-level students, but also to practicing scientists and engineers. Many worked-out examples and numerous exercises with their solutions will facilitate learning and understanding, and an appendix includes data on key properties of important substances.
Author: Ryoichi Amano
Publisher: WIT Press
ISBN: 1845640624
Category : Technology & Engineering
Languages : en
Pages : 417
Get Book Here
Book Description
Research and development in thermal engineering for power systems are of significant importance to many scientists who are engaged in research and design work in power-related industries and laboratories. This book focuses on variety of research areas including Components of Compressor and Turbines that are used for both electric power systems and aero engines, Fuel Cells, Energy Conversion, and Energy Reuse and Recycling Systems. To be competitive in today's market, power systems need to reduce the operating costs, increase capacity factors and deal with many other tough issues. Heat Transfer and fluid flow issues are of great significance and it is likely that a state-of-the-art edited book with reference to power systems will make a contribution for design and R&D engineers and the development towards sustainable energy systems.
Author: Michael Kenneth West
Publisher:
ISBN:
Category :
Languages : en
Pages : 322
Get Book Here
Book Description
Author: Shine-Zen Kuhn
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
Get Book Here
Book Description
