Compact Heat Exchangers (eBook)

Selection, Design and Operation

J.E. Hesselgreaves (Autor)

eBook Download: PDF

2001 | 1. Auflage
416 Seiten
Elsevier Science (Verlag)
978-0-08-052954-7 (ISBN)

Infos

This book presents the ideas and industrial concepts in compact heat exchanger technology that have been developed in the last 10 years or so. Historically, the development and application of compact heat exchangers and their surfaces has taken place in a piecemeal fashion in a number of rather unrelated areas, principally those of the automotive and prime mover, aerospace, cryogenic and refrigeration sectors. Much detailed technology, familiar in one sector, progressed only slowly over the boundary into another sector. This compartmentalisation was a feature both of the user industries themselves, and also of the supplier, or manufacturing industries. These barriers are now breaking down, with valuable cross-fertilisation taking place.

One of the industrial sectors that is waking up to the challenges of compact heat exchangers is that broadly defined as the process sector. If there is a bias in the book, it is towards this sector. Here, in many cases, the technical challenges are severe, since high pressures and temperatures are often involved, and working fluids can be corrosive, reactive or toxic. The opportunities, however, are correspondingly high, since compacts can offer a combination of lower capital or installed cost, lower temperature differences (and hence running costs), and lower inventory. In some cases they give the opportunity for a radical re-think of the process design, by the introduction of process intensification (PI) concepts such as combining process elements in one unit. An example of this is reaction and heat exchange, which offers, among other advantages, significantly lower by-product production.

To stimulate future research, the author includes coverage of hitherto neglected approaches, such as that of the Second Law (of Thermodynamics), pioneered by Bejan and co- workers. The justification for this is that there is increasing interest in life-cycle and sustainable approaches to industrial activity as a whole, often involving exergy (Second Law) analysis. Heat exchangers, being fundamental components of energy and process systems, are both savers and spenders of exergy, according to interpretation.

Inhalt

Front Cover 1
Compact Heat Exchangers: Selection, Design and Operation 4
Copyright Page 5
Contents 14
Chapter 1. Introduction 20
Recent developments in compact exchanger technology 20
Basic aspects of compactness 22
Scaling laws for heat exchangers 28
The relationship of compactness and enhancement 33
The function of secondary surfaces (fins) 38
Compactness and its relationship to enhanced boiling surfaces, rib roughnesses, etc. 39
Surface optimisation 41
Heat exchanger reactors 42
References 44
Chapter 2. Industrial Compact Exchangers 46
The Plate-Fin Heat Exchangers (PFHE) 47
Tube-fin heat exchangers 53
Diffusion bonded heat exchangers 54
The printed circuit heat exchanger (PCHE) 54
Welded plate heat exchangers 60
Plate and Frame Heat Exchangers (PHE) and derivatives 70
The Plate and Shell Heat Exchanger (PSHE) 79
Spiral Heat Exchangers (SHE) 80
Compact Shell and Tube Heat Exchangers 82
Polymer Exchangers 83
Some recent developments 84
Heat Exchanger Reactors 88
Surface selection 93
References 99
Chapter 3. The Heat Exchanger as Part of a System: Exergetic (Second Law) Analysis 102
Introduction 102
Basic Principles of Exergy Analysis 103
Application of Exergy Analysis to Heat Exchangers 111
Zero Pressure Drop 115
Finite Pressure Drop 126
Implications of the Entropy Minimisation Analysis 135
Application To Heat Exchanger Networks 139
References 140
Chapter 4. Surface Comparisons, Size, Shape and Weight Relationships 144
Introduction 144
Conventional Theory (The Core Mass Velocity Equation, and Geometrical Consequences) 145
Laminar Flow Analysis 156
Comparison of Compact Surfaces 162
Comparison of Conventional and Laminar Approaches 165
References 172
Chapter 5. Surface Types and Correlations 174
Introduction 174
Ducts 174
Plate- Fin Surfaces 193
Pressed Plate Type Surfaces 212
Plate and Shell Surfaces 215
Other Plate-Type Surfaces (Welded Plates etc.) 215
Printed Circuit Heat Exchanger (PCHE) Surfaces 216
References 216
Chapter 6. Thermal Design 220
Introduction 220
Form of specification 221
Basic Concepts and Initial Size Assessment 222
Details of the Design Process 240
Design for Two- Phase Flows 262
The design process 276
Thermal Design for Heat Exchanger Reactors 283
Mechanical Aspects of Design 285
References 287
Chapter 7. Compact Heat Exchangers In Practice 294
Installation 294
Commissioning 296
Operation 297
Maintenance 298
Design Approaches to Reduce Fouling 312
Fouling Factors 315
References 319
Appendices 322
1. Nomenclature 323
2. Conversion factors 328
3. Software organisations and awareness groups 330
4. List of manufacturers 350
5. Physical properties 359
Index 410

Produkt-Details

• Erscheint lt. Verlag: 8.5.2001
• Sprache: englisch
• Themenwelt: Sachbuch/Ratgeber
• Themenwelt: Naturwissenschaften ► Physik / Astronomie ► Thermodynamik
• Themenwelt: Technik ► Bauwesen
• Themenwelt: Technik ► Maschinenbau
• ISBN-10: 0-08-052954-2 / 0080529542
• ISBN-13: 978-0-08-052954-7 / 9780080529547