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Two-phase flow in energy exchange systems

presented at the Winter Annual Meeting of the American Society fo Mechanical Engineers, Anaheim, California, November 8-13, 1992
  • 109 Pages
  • 4.38 MB
  • 5757 Downloads
  • English

The Society , New York
Heat exchangers -- Congresses., Two-phase flow -- Congre
Statementsponsored by the Heat Transfer Division, ASME ; edited by M.S. Sohal, T.J. Rabas.
SeriesHTD ;, vol. 220, HTD (Series) ;, v. 220.
ContributionsSohal, M. S., Rabas, T. J., American Society of Mechanical Engineers. Winter Meeting, American Society of Mechanical Engineers. Heat Transfer Division.
Classifications
LC ClassificationsTJ263 .T85 1992
The Physical Object
Paginationv, 109 p. :
ID Numbers
Open LibraryOL1745917M
ISBN 100791810631
LC Control Number92056527

Get this from a library. Two-phase flow in energy exchange systems: presented at the Winter Annual Meeting of the American Society fo Mechanical Engineers, Anaheim, California, November[M S Sohal; T J Rabas; American Society of Mechanical Engineers.

Winter Annual Meeting; American Society of Mechanical Engineers. Heat Transfer Division.;]. Flow Patterns – Two-phase Flow. One of the most challenging aspects of dealing with two-phase flow or multi-phase flow is the fact that it can take many different forms.

Spatial distributions and velocities of the liquid and vapor phases in the flow channel is very important aspect in many engineering branches. This book presents for the first time a comprehensive coverage of all aspects of two-phase flow behaviour in the virtual absence of gravity.

About the Author Dr. Kamiel Gabriel is the Associate Provost of Research & Graduate Programs at UOIT; one of Canada’s newest technical cturer: Springer. The nitrogen isotope separation factor has been determined for many operating systems representing two-phase chemical exchange systems.

It is found that to enhance the flow conversion completeness, efforts are made to liberate ammonia more completely from the forming MeNO 3 salt solution, for which the solution is subjected to boiling.

Two-Phase Flow in Complex Systems offers a unique look at two-phase flow phenomena Two-phase flow in energy exchange systems book gas and liquid) in a variety of systems, from water reactors to the global climate system.

Focusing on the interaction and simultaneous behavior of all the components in a system, the book's approach departs significantly from conventional texts, which Cited by: 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. An experimental test facility was built to study two-phase flow instabilities in vertical annular channel with emphasis on downward flow under low pressure and low flow conditions.

The specific geometry of the test section is similar to the fuel-target sub-channel of the. This book covers advanced mass and heat transfer and vapor compression refrigeration systems and shows how the performance of an automotive air-conditioning system is affected through results obtained experimentally and theoretically, specifically with consideration of Brand: Springer New York.

two phase flow phenomena in fuel cell microchannels Download two phase flow phenomena in fuel cell microchannels or read online books in PDF, EPUB, Tuebl, and Mobi Format. Click Download or Read Online button to get two phase flow phenomena in fuel cell microchannels book now.

This site is like a library, Use search box in the widget to get. A wide range of models have been developed for two-phase flow systems. These include: Homogeneous the homogeneous model, the two phases are assumed to be travelling at the same velocity in the channel and the flow is treated as being analogous to a single phase flow (see article on Multiphase Flow).

Separated flowthe two fluids are considered to be travelling at. Over the past two decades, two-phase flow instability problems have been a challenge to many investigators. Such instabilities could induce boiling crisis, disturb control systems and/or cause mechanical damage.

It is important to be able to predict the conditions under which a two-phase flow system will perform without instability. In fluid mechanics, two-phase flow is a flow of gas and liquid — a particular example of multiphase -phase flow can occur in various forms, such as flows transitioning from pure liquid to vapor as a result of external heating, separated flows, and dispersed two-phase flows where one phase is present in the form of particles, droplets, or bubbles in a continuous carrier phase (i.e.

Two-Phase Flow in Refrigeration Systems presents recent developments from the authors' extensive research programs on two-phase flow in refrigeration systems. This book covers advanced mass and heat transfer and vapor compression refrigeration systems and shows how the performance of an automotive air-conditioning system is affected through Brand: Springer New York.

The ERM can be applied to a two-phase flow with flashing (i.e., to vapor pressure systems) and is based on the following assumptions 4: • Two-phase flow without flashing occurs. • The two phases are homogeneously mixed through the blowdown line. • No phase slip occurs. • A partial nonequilibrium between the two phases is taken into account.

Single-phase Fluid Flow; Multi-phase Fluid Flow (or Two-phase Fluid Flow); This is a basic of the fluid flow equations (e.g. Bernoulli’s Equation) and relationships that were discussed in this section (Fluid Dynamics) were derived for the flow of a single phase of fluid whether liquid or vapor.

Solution of multi-phase fluid flow is very complex and difficult and therefore. Annular Two-Phase Flow presents the wide range of industrial applications of annular two-phase flow regimes.

This book discusses the fluid dynamics and heat transfer aspects of the flow pattern. Organized into 12 chapters, this book begins with an overview of the classification of the various types of interface distribution observed in Edition: 1. Two-Phase Flow Heat Exchangers: Thermal-Hydraulic Fundamentals and Design - Ebook written by Sadik Kakaç, Arthur E.

Bergles, E. Oliveira Fernandes.

Description Two-phase flow in energy exchange systems FB2

Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading, highlight, bookmark or take notes while you read Two-Phase Flow Heat Exchangers: Thermal-Hydraulic Fundamentals and Design.5/5(2).

Single-phase transport on the cathode side of FC increases reaction rate: In a traditional FC the mass transport of reactant is a two-phase process. In a proton exchange membrane fuel cell (PEMFC. Flow Patterns – Two-phase Flow. One of the most challenging aspects of dealing with two-phase flow or multi-phase flow is the fact that it can take many different forms.

Spatial distributions and velocities of the liquid and vapor phases in the flow channel is very important aspect in many engineering re drops and also heat transfer coefficients strongly depends on the local. Two-phase Fluid Flow.

Download Two-phase flow in energy exchange systems FB2

By definition, multiphase flow is the interactive flow of two or more distinct phases with common interfaces in, say, a conduit. Each phase, representing a volume fraction (or mass fraction) of solid, liquid or gaseous matter, has its own properties, velocity, and temperature.

A multiphase flow can be simultaneous flow of. Cambridge Core - Thermal-Fluids Engineering - Two-Phase Flow, Boiling, and Condensation - by S.

Mostafa GhiaasiaanAuthor: S. Mostafa Ghiaasiaan. Review of Single-Phase Flow Basic Fluid Flow Concepts Flow Field Descriptions Conservation Laws Turbulence Solution Techniques Homework Problem Assignments 2.

4. Two Phase Flow page 4- 6 5. Flow Patterns page 7- 8 6. Interfacial Mass and Energy Exchange page 9 7. Two Phase Flow in Horizontal Pipes page 10 8. Pressure Drop page 11 9. Future Work page 11 Timetable page 12 References page 13 1. Abstract. Multiphase thermal systems have numerous applications in aerospace, heat-exchange, transport of contaminants in environmental systems, and energy transport and conversion systems.

A reduced - or microgravity - environment provides an excellent tool for accurate study of the flow without the masking effects of gravity.

Friedel, L., “Improved Friction Pressure Drop Correlations for Horizontal and Vertical Two-Phase Pipe Flow, European Two-Phase Flow Group Meeting, Ispra, Italy, Google Scholar Forster, H.

and N. Zuber, “Dynamics of Vapor Bubbles and Boiling Heat Transfer,” AIChE Journal, 1(4), –, the difference between various forms of energy. (quiz, self-assessment, PRS) 2) To be able to identify and describe energy exchange processes (in terms of various forms of energy, heat and work) in aerospace systems.

(quiz, homework, self-assessment, PRS) 3) To be able to explain at a level understandable by a high school senior or non.

Flow Geometries. The Flow geometry parameter indicates the type of channel that is to carry the moist air.

Details Two-phase flow in energy exchange systems FB2

The moist air can flow inside a tube or tube bundle, outside a tube or tube bundle (or bank in this context), or through a channel of unspecified geometry. Unspecified geometries use a generic parameterization, one less detailed in its calculations but better suited for unconventional.

horizontal flow, in addition to the above flow regimes, there can also be stratified flow, typical of low flow rates at which the two phases separate under the effect of gravity. Table 1.

Qualitative classification of two‐phase flow regimes. Flow quality Flow rate Flow regime Low Low and intermediate Bubbly High Dispersed bubbly. A transparent ex situ cell was designed, reproducing two-phase flow in an electrolysis cell. The two-phase flow regime was investigated for the first time as a function of stoichiometry and compared to findings reported in the literature.

Specifically, stoichiometries of 95– were by: 4. A three dimensional, two-phase, multi-component model has been developed for a liquid-fed DMFC. Both liquid and gas phases are considered in the entire anode, including the channel, the diffusion layer and the catalyst layer; while at the cathode, two-phases are considered in the gas diffusion layer and the catalyst layer but single gas phase is considered in the : Jiabin Ge, Hongtan Liu.

Two-phase flows, and in particular particle-laden flows, are used widely in industry, especially in the field of thermal energy technologies. The distributions of the particles in these systems is not only complex, which makes them difficult to predict reliably, but also has a significant impact on the performance of these reactors (Smith et al.

; Smith et al. ).Boiling and two-phase flow Case studies with FLUENT (contd.)Boiling flow in nuclear reactor Liquid vapor mixture exits • Flow in nuclear fuel assembly – Pressure 50 atm – Reliq=, – Heat flux MW/m2 – Inlet subcooling K – y+= Liquid enters Engineering Stack Exchange is a question and answer site for professionals and students of engineering.

Multiphase Flow - Energy Coupling Parameter. Ask Question Asked 3 years, 1 researchers largely gave up trying to analytically solve two phase heat transfer problems because you had to make too many assumptions and the results.