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Author : Douglas Harvin
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (21 download)
Download or read book Condensation of Steam from a Steam/air Mixture Flowing in a Vertical Tube written by Douglas Harvin and published by . This book was released on 1989 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (925 download)
Download or read book An Investigation of Condensation from Steam-gas Mixtures Flowing Downward Inside a Vertical Tube written by and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Chor-Kheng Tan
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (32 download)
Download or read book Experimental Study of Condensation from Steam-air Mixtures Flowing Over a Horizontal Tube: Overall Condensation Rates written by Chor-Kheng Tan and published by . This book was released on 1974 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daniel Grant Ogg
Publisher :
ISBN 13 :
Total Pages : 308 pages
Book Rating : 4.:/5 (33 download)
Download or read book Vertical Downflow Condensation Heat Transfer in Gas-steam Mixtures written by Daniel Grant Ogg and published by . This book was released on 1991 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karen Marie Vierow
Publisher :
ISBN 13 :
Total Pages : 474 pages
Book Rating : 4.:/5 (33 download)
Download or read book Behavior of Steam-air Systems Condensing in Cocurrent Vertical Downflow written by Karen Marie Vierow and published by . This book was released on 1990 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ahmed Husham Mahmood
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Effects of Condensation on Steam-water, Counter-current Flooding in a Vertical Tube written by Ahmed Husham Mahmood and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During a loss of coolant accident in a pressurised water reactor, emergency core cooling water is introduced via the downcomer annulus. The water may have to penetrate or overcome steam formed in the vessel due to the depressurisation. A typical counter-current flow situation can be created and dependent on the relative flow rates water may be prevented from reaching the reactor core with serious consequences. This,thesis considers the events leading up to this occurrence in a vertical, 54.75 mm diameter, 1 m long, stainless steel tube, to represent and provide a basic understanding of the situation occurring during a loss of coolant accident. Results are presented for air-water and steam-water flows with emphasis on the experimental and theoretical studies of the steam-water flow situation where direct contact heat transfer occurs. The air-water flooding data are shown to be well represented by a Wallis type flooding correlation. The steam-water flooding data are found to lie above the corresponding air-water data with their characteristic dependent on the water inlet subcooling. The percentage of the air/steam flow extracted with the water flow at the bottom porous sinter was found to exert a negative effect on the flooding phenomena. A theoretical model was developed to predict the liquid film thickness along the tube, and agreement with the experimental results demonstrated. A second theoretical model was developed to evaluate the temperature across the liquid film and along the test tube and from this model, the effective turbulent diffusivity was evaluated, leading to an estimate of the turbulent viscosity of the film under conditions in which substantial condensation took place. A semi-empirical model based on a linear stability analysis of a uniform liquid film and a counter-current flow of steam, was developed and modified for accelerating film flows. This model is shown to be capable of dealing with the steam-water flooding situation since reasonable agreement with the air-water flooding data is obtained. A modified Wallis type flooding correlation based on the experimental data, and accounting for non-equilibrium effect on flooding, is presented and discussed. A visualisation technique was developed and used to determine the flooding location in the section.
Author : Sadik Kakaç
Publisher : Springer Science & Business Media
ISBN 13 : 9400927908
Total Pages : 1090 pages
Book Rating : 4.4/5 (9 download)
Download or read book Two-Phase Flow Heat Exchangers written by Sadik Kakaç and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-phase flow heat exchangers are vital components of systems for power generation, chemical processing, and thermal environment control. The art and science of the design of such heat exchangers have advanced considerably in recent years. This is due to better understanding of the fundamentals of two-phase flow and heat transfer in simple geometries, greater appreciation of these processes in complex goemetries, and enhanced predictive capability through use of complex computer codes. The subject is clearly of great fundamental and practical importance. The NATO ASIan Thermal-Hydraulic Fundamentals and Design of Two-Phase Flow Heat Exchangers was held in Povoa de Varzim (near Porto), Portugal, July 6-17, 1987. participating in the organization of" the ASI were the Department of Mechanical Engineering and the Clean Energy Research Institute, University of Miami; Universidade do Porto; and the Department of Mechanical Engineering, Aeronautical Eng ineer ing, and Mechanics, Rensselaer Polytechnic Institute. The ASI was arranged primarily as a high-level teaching activity by experts representing both academic and industrial viewpoints. The program included the presentation of invited lectures, a limited number of related technical papers and discussion sessions.
Author : Valentin Uchanin
Publisher : BoD – Books on Demand
ISBN 13 : 9533073039
Total Pages : 440 pages
Book Rating : 4.5/5 (33 download)
Download or read book Steam Generator Systems written by Valentin Uchanin and published by BoD – Books on Demand. This book was released on 2011-03-16 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is intended for practical engineers, researchers, students and other people dealing with the reviewed problems. We hope that the presented book will be beneficial to all readers and initiate further inquiry and development with aspiration for better future. The authors from different countries all over the world (Germany, France, Italy, Japan, Slovenia, Indonesia, Belgium, Romania, Lithuania, Russia, Spain, Sweden, Korea and Ukraine) prepared chapters for this book. Such a broad geography indicates a high significance of considered subjects.
Author : T. Furman
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (25 download)
Download or read book Experimental Investigation Into the Effects of Cross Flow with Condensation of Steam and Steam-gas Mixtures on a Vertical Tube written by T. Furman and published by . This book was released on 1959 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : De-Yi Shang
Publisher : Springer Science & Business Media
ISBN 13 : 3642125816
Total Pages : 350 pages
Book Rating : 4.6/5 (421 download)
Download or read book Theory of Heat Transfer with Forced Convection Film Flows written by De-Yi Shang and published by Springer Science & Business Media. This book was released on 2010-12-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing a new treatment of ‘Free Convection Film Flows and Heat Transfer’ began in Shang’s first monograph and is continued in this monograph. The current book displays the recent developments of laminar forced convection and forced film condensation. It is aimed at revealing the true features of heat and mass transfer with forced convection film flows to model the deposition of thin layers. The novel mathematical similarity theory model is developed to simulate temperature- and concentration- dependent physical processes. The following topics are covered in this book: 1. Mathematical methods - advanced similarity analysis method to replace the traditional Falkner-Skan type transformation - a novel system of similarity analysis and transformation models to overcome the difficult issues of forced convection and forced film flows - heat and mass transfer equations based on the advanced similarity analysis models and equations formulated with rigorous key numerical solutions 2. Modeling the influence of physical factors - effect of thermal dissipation on forced convection heat transfer - a system of models of temperature and concentration-dependent variable physical properties based on the advanced temperature-parameter model and rigorous analysis model on vapor-gas mixture physical properties for the rigorous and convenient description of the governing differential equations - an available approach to satisfy interfacial matching conditions for rigorous and reliable solutions - a system of numerical results on velocity, temperature and concentration fields, as well as, key solutions on heat and mass transfer - the effect of non-condensable gas on heat and mass transfer for forced film condensation. This way it is realized to conveniently and reliably predict heat and mass transfer for convection and film flows and to resolve a series of current difficult issues of heat and mass transfer with forced convection film flows. Professionals in this fields as well as graduate students will find this a valuable book for their work.
Author : John William Rauscher
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (327 download)
Download or read book An Experimental Investigation of Laminar Film Condensation from Steam-air Mixtures Flowing Downward Over a Horizontal Tube written by John William Rauscher and published by . This book was released on 1973 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. Mostafa Ghiaasiaan
Publisher : Cambridge University Press
ISBN 13 : 1316785300
Total Pages : 1322 pages
Book Rating : 4.3/5 (167 download)
Download or read book Two-Phase Flow, Boiling, and Condensation written by S. Mostafa Ghiaasiaan and published by Cambridge University Press. This book was released on 2017-01-11 with total page 1322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a comprehensive introduction to the fundamentals and applications of flow and heat transfer in conventional and miniature systems, this fully enhanced and updated edition covers all the topics essential for graduate courses on two-phase flow, boiling, and condensation. Beginning with a concise review of single-phase flow fundamentals and interfacial phenomena, detailed and clear discussion is provided on a range of topics, including two-phase hydrodynamics and flow regimes, mathematical modeling of gas-liquid two-phase flows, pool and flow boiling, flow and boiling in mini and microchannels, external and internal-flow condensation with and without noncondensables, condensation in small flow passages, and two-phase choked flow. Numerous solved examples and end-of-chapter problems that include many common design problems likely to be encountered by students, make this an essential text for graduate students. With up-to-date detail on the most recent research trends and practical applications, it is also an ideal reference for professionals and researchers in mechanical, nuclear, and chemical engineering.
Author : Shine-Zen Kuhn
Publisher :
ISBN 13 :
Total Pages : 732 pages
Book Rating : 4.:/5 (33 download)
Download or read book Investigation of Heat Transfer from Condensing Steam-gas Mixtures and Turbulent Films Flowing Downward Inside a Vertical Tube written by Shine-Zen Kuhn and published by . This book was released on 1995 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Takao Kageyama
Publisher :
ISBN 13 :
Total Pages : 268 pages
Book Rating : 4.:/5 (33 download)
Download or read book Application of Diffusion Layer Theory to Vertical Downflow Condensation Heat Transfer written by Takao Kageyama and published by . This book was released on 1992 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lewis Livingston
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (957 download)
Download or read book Condensation of Steam in the Presence of Air in Vertical Tubes written by Lewis Livingston and published by . This book was released on 1974 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. G. Bankoff
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.3/5 (91 download)
Download or read book Steam-water Condensation Studies written by S. G. Bankoff and published by . This book was released on 1981 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shine-Zen Kuhn
Publisher :
ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.:/5 (33 download)
Download or read book Experimental Investigation of Downward Condensation in Vertical Tube with Noncondensable Gases written by Shine-Zen Kuhn and published by . This book was released on 1993 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
