725_09 - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 [Fi r s [63 5 Lin e 2.3 4 —— No r m PgE [63 5 CHAPTER 9 Boiling JOHN R.THOME Laboratory of Heat and Mass Transfer Faculty of Engineering Science Swiss Federal Institute of Technology Lausanne Lausanne, Switzerland 9.1 Introduction to boiling heat transfer 9.2 Boiling curve 9.3 Boiling nucleation 9.3.1 Introduction 9.3.2 Nucleation superheat 9.3.3 Size range of active nucleation sites 9.3.4 Nucleation site density 9.4 Bubble dynamics 9.4.1 Bubble growth 9.4.2 Bubble departure 9.4.3 Bubble departure frequency 9.5 Pool boiling heat transfer 9.5.1 Nucleate boiling heat transfer mechanisms 9.5.2 Nucleate pool boiling correlations Bubble agitation correlation of Rohsenow Reduced pressure correlation of Mostinski Physical property type of correlation of Stephan and Abdelsalam Reduced pressure correlation of Cooper with surface roughness Fluid-speci±c correlation of Gorenflo 9.5.3 Departure from nucleate pool boiling (or critical heat flux) 9.5.4 Film boiling and transition boiling 9.6 Introduction to flow boiling 9.7 Two-phase flow patterns 9.7.1 Flow patterns in vertical and horizontal tubes 9.7.2 Flow pattern maps for vertical flows 9.7.3 Flow pattern maps for horizontal flows 9.8 Flow boiling in vertical tubes 9.8.1 Chen correlation 9.8.2 Shah correlation 9.8.3 Gungor–Winterton correlation 9.8.4 Steiner–Taborek method 9.9 Flow boiling in horizontal tubes 9.9.1 Horizontal tube correlations based on vertical tube methods 635
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
636 BOILING 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 [636 Lin e 12 . 0 —— Sho r PgE n [636 9.9.2 Horizontal flow boiling model based on local flow regime 9.9.3 Subcooled boiling heat transfer 9.10 Boiling on tube bundles 9.10.1 Heat transfer characteristics 9.10.2 Bundle boiling factor 9.10.3 Bundle design methods 9.11 Post-dryout heat transfer 9.11.1 Introduction 9.11.2 Thermal nonequilibrium 9.11.3 Heat transfer mechanisms 9.11.4 Inverted annular flow heat transfer 9.11.5 Mist flow heat transfer 9.12 Boiling of mixtures 9.12.1 Vapor–liquid equilibria and properties 9.12.2 Nucleate boiling of mixtures 9.12.3 Flow boiling of mixtures 9.12.4 Evaporation of refrigerant–oil mixtures 9.13 Enhanced boiling 9.13.1 Enhancement of nucleate pool boiling 9.13.2 Enhancement of internal convective boiling Nomenclature References 9.1 INTRODUCTION TO BOILING HEAT TRANSFER When heat is applied to a surface in contact with a liquid, if the wall temperature is suf±ciently above the saturation temperature, boiling occurs on the wall. Boiling may occur under quiescent fluid conditions, which is referred to as pool boiling, or under forced-flow conditions, which is referred to as forced convective boiling. In this chapter a review of the fundamentals of boiling is presented together with numerous predictive methods. First the fundamentals of pool boiling are addressed and then those of flow boiling. To better understand the mechanics of flow boiling, a section is also presented on two-phase flow patterns and flow pattern maps. Then the
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 83

725_09 - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online