HEAT EXCHANGERS Selection, Rating, and Thermal Design

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HEAT EXCHANGERS Selection, Rating, and Thermal Design

HEATEXCHANGERS Selection, Rating, and Thermal Design

Book Details 

Pages : 624
Size : 8 MB

Book Description

Heat exchangers are vital in power producing plants, process and chemi-
cal industries, and in heating, ventilating, air-conditioning, refrigeration sys-
tems, and cooling of electronic systems. A large number of industries are
engaged in designing various types of heat exchange equipment. Courses
are offered at many colleges and universities on thermal design under vari-
ous titles.
There is extensive literature on this subject; however, the information
has been widely scattered. This book provides a systematic approach and
should be used as an up-to-date textbook based on scattered literature
for senior undergraduate and first-year graduate students in mechanical,
nuclear, aerospace, and chemical engineering programs who have taken
introductory courses in thermodynamics, heat transfer, and fluid mechan-
ics. This systematic approach is also essential for beginners who are inter-
ested in industrial applications of thermodynamics, heat transfer, and
fluid mechanics, and for the designers and the operators of heat exchange
equipment. This book focuses on the selections, thermohydraulic designs,
design processes, ratings, and operational problems of various types of heat
exchangers.
One of the main objectives of this textbook is to introduce thermal design
by describing various types of single- and two-phase flow heat exchangers,
detailing their specific fields of application, selection, and thermohydraulic
design and rating, and showing thermal design and rating processes with
worked examples and end-of-chapter problems including student design
projects.
Much of this text is devoted to double-pipe, shell-and-tube, compact,
gasketed-plate heat exchanger types, condensers, and evaporators. Their
design processes are described and thermal–hydraulic design examples are
presented. Some other types, mainly specialized ones, are briefly described
without design examples. Thermal design factors and methods are common,
however, to all heat exchangers, regardless of their function.
This book begins in Chapter 1 with the classification of heat exchang-
ers according to different criteria. Chapter 2 provides the basic design
methods for sizing and rating heat exchangers. Chapter 3 is a review of
single-phase forced convection correlations in channels. A large number
of experimental and analytical correlations are available for the heat
transfer coefficient and flow friction factor for laminar and turbulent
flow through ducts. Thus, it is often a difficult and confusing task for
a student, and even a designer, to choose appropriate correlations. In
Chapter  3, recommended correlations for the single-phase side of heat
exchangers are given with worked examples. Chapter 4 discusses pres-
sure drop and pumping power for heat exchangers and their piping
circuit analysis. The thermal design fundamentals for microscale heat
exchangers and the enhancement heat transfer for the applications to
the heat exchanger design with nanofluids are provided in Chapter 5.
Also presented in Chapter 5 are single-phase forced convection correla-
tions and flow friction factors for microchannel flows for heat transfer
and pumping power calculations. One of the major unresolved problems
in heat exchanger equipment is fouling; the design of heat exchangers
subject to fouling is presented in Chapter 6. Double-pipe heat exchanger
design methods are presented in Chapter 7. The important design cor-
relations for the design of two-phase flow heat exchangers are given in
Chapter 8. The thermal design methods and processes for shell-and-tube,
compact, and gasketed-plate heat exchangers are presented in Chapters 9,
10, and 11 for single-phase duties, respectively. Chapter 10 deals with the
gasketed-plate heat exchangers, and has been revised with new correla-
tions to calculate heat transfer and friction coefficients for chevron-type
plates provided; solved examples in Chapter 10 and throughout the book
have been modified. With this arrangement, both advanced students and
beginners will achieve a better understanding of thermal design and will
be better prepared to specifically understand the thermal design of con-
densers and evaporators that is introduced in Chapter 12. An overview of
polymer heat exchangers is introduced in Chapter 13 as a new chapter; in
some applications, the operating limitations of metallic heat exchangers
have created the need to develop alternative designs using other materi-
als, such as polymers, which have the ability to resist fouling and corro-
sion. Besides, the use of polymers offers substantial reductions in weight,
cost, water consumption, volume, and space, which can make these heat
exchangers more competitive over metallic heat exchangers.
The appendices provide the thermophysical properties of various fluids,
including the new refrigerants.

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