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Efficient Surfaces for Heat Exchangers. Fundamentals and Design

ISBN:
1-56700-167-X (Druckformat)

Efficient Surfaces for Heat Exchangers. Fundamentals and Design

E. K. Kalinin
Moscow Aviation Institute — Technical University, Moscow, Russia

Guenrikh A. Dreitser
Department of Aviation-Space Thermal Techniques, Moscow Aviation Institute, Volokolamskoe shosse, 4, Moscow, 125993, Russia

I. Z. Kopp
Saint-Petersburg State Technical University, St. Petersburg, Russia

A. S. Myakochin
Department of Aviation and Space Thermal Technics, Moscow Aviation Institute, Volokolamskoe shosse, 4, Moscow, 125993, Russia

Beschreibung

The method for creation of effective heat transfer surfaces for one-phase flows, boiling, condensation, and radiation are considered. The results of experimental and analytical studies of the laws governing enhancement of heat transfer processes and influence of a macro- and microstructure of surfaces on the mechanism and characteristics of heat transfer are systematized. The concept of a real phase interface – a transition surface region – is introduced. The methods of enhancement of heat transfer in different channels of heat exchanging apparatuses are considered. Practical recommendations for a choice of ways of heat transfer enhancement, calculations of heat transfer, and hydraulic losses are given.



414 pages, © 2001

Inhaltsverzeichnis:

Preface by the English Edition Editors
Foreword to the English Edition
Preface to the First Russian Edition
Nomenclature
Introduction
1. MODERN CONCEPTS OF HEAT TRANSFER SURFACES AND THEIR EFFICIENCY
1.1. Characteristics of Efficient Heat Transfer Surfaces
1.2. Macrostructure of Heat Transfer Surfaces
1.3. Microstructure of Heat Transfer Surfaces
1.4. Formation and the Structure of Real Heat Transfer Surfaces
1.5. Special Features of Surfaces with Coatings
1.6. Thermal Resistances in Multilayer Materials for Heat Exchangers
1.7. Interaction of Heat Transfer Surfaces with Liquid Heat Agents
1.8. Phase Interface - Transient Surface Region
2. EFFICIENT SURFACES OF CONVECTIVE HEAT TRANSFER
2.1. Methods of Choosing Efficient Heat Transfer Surfaces
2.2. Separation Zone as Means for Additional Flow Turbulization
2.3. Analysis of Methods of Heat Transfer Enhancement
2.4. Heat Transfer Enhancement in Straight Channels with Longitudinal Flow Past Tube Bundles
2.5. Heat Transfer at Channel Walls with Discrete Flow Turbulization
2.6. Enhancement of Heat Transfer in Tubes
2.6.1. Enhancement of heat transfer in the region of transition to turbulent flow
2.6.2. Theoretical metods of calculating heat transfer enhancement in turbulent flow
2.6.3. Effect of the Reynolds number
2.6.4. Effect of the Prandtl number
2.6.5. Effect of the turbulizer profile
2.6.6. Effect of height and pitch of diaphragms
2.6.7. Effect of the temperature factor in artifical flow turbulization
2.6.8. Enhancement of heat transfer in tube flow of hydrocarbons with supercritical parametrs
2.7. Enhancement of Heat Transfer in Longitudinal Flow Past Tube Bundles and Annular Channels
2.7.1. Enhancement of heat transfer in tube bundles in longitudinal flow using transverse annular grooves
2.7.2. Enhancement of heat transfer in annular channels with grooves on the inner tube
2.7.3. Enhancement of heat transfer in annular channels by transverse finning
2.7.4. Enhancement of heat transfer in tube bundles with transverse fins in longitudinal flow
2.7.5. Enhancement of heat transfer in annular channels with one-sided turbulizers of the “protrusion-groove” type
2.8. Enhancement of Heat Transfer in Flat and Triangular Channels
2.8.1. Enhancement of heat transfer in flat channels by transverse finning
2.8.2. Enhancement of heat transfer in triangular channels
2.9. Enhancement of Heat Transfer in Transverse Flow Past Tube Bundles with Annular Turbulizers
3. EFFICIENCY OF HEAT TRANSFER SURFACES IN BOILING OF LIQUIDS
3.1. Conditions for Nucleation of the Vapor Phase on a Real Heat Transfer Surface
3.2. Stable and Unstable Vapor Nuclei
3.3. Temperature Difference (Head) in the Origination of Vapor Nuclei
3.4. Models of Originations of Nuclei of Vapor Bubbles on a Real Surface
3.5. Development of the Vapor Phase on the Surface (Growth of Bubbles)
3.6. Heat Transfer at the Nucleation Site on a Real Surface
3.7. Number of Nucleation Sites on a Real Surface
3.8. Limiting Values of Heat Transfer in Boiling on Real Surfaces
3.9. Experimental Study of Heat Transfer Enhancement in Boiling on Real Surfaces
4. EFFICIENT HEAT TRANSFER SURFACES IN CONDENSATION
4.1. Methods of Heat Transfer Enhancement in Condensation
4.2. Enhancement of Heat Transfer in Condensation on Horizontal Tubes with Annular Grooves
4.3. Enhancement of Heat Transfer in Condensation on the Outer Surface of Vertical Tubes with Annular Grooves
4.4. Enhancement of Heat Transfer in Condensation of Vapor Mixtures on Vertical Surfaces
4.5. Enhancement of Heat Transfer in Condensation of a Vapor-Air Mixture on Vertical Tubes
4.6. Enhancement of Heat Transfer in Condensation of Vapor Mixtures on Horizontal Tubes
5. EFFICIENT SURFACES FOR THERMAL RADIATION
5.1. Characteristics of Thermal Radiation Surfaces
5.2. Interaction of Surfaces with Thermal Radiation
5.3. Radiative Heat Exchange between Surfaces
5.4. Effect of the Surface Structure on the Efficiency of Radiative Heat Transfer
5.5. Radiative Heat Transfer of Finned Surfaces
5.6. Effect of Screens on the Efficiency of Radiative Heat Transfer
5.7. Screening of Radiation by Intermediate Media and Surfaces Requirements
6. METHODS OF CALCULATION AND DESIGN OF EFFICIENT HEAT TRANSFER SURFACES
6.1. Estimating the Efficiency of Heat Transfer Enhancement
6.2. Selection of a Method of Heat Transfer Enhancement in Channels
6.3. Calculation of Heat Transfer and Hydraulic Resistance in Heat Exchangers with Tubes with Annular Turbulizers
6.4. Recommendations for Optimal Parameters of Turbulizers for Different Types of Heat Exchangers
6.5. Standard Dimensions of Turbulizers on Tubes
References
Appendix
Unit Conversion
Conversion Factors
Index