Advanced Analytic and Control Techniques for Thermal Systems with Heat Exchangers

Libor Pekar

• Publisher: Academic Press
• Year: 2020
• ISBN:
  9780128194232
• Topic: Technology & Engineering
• Subtopic: Power Resources
• Index: Technology & Engineering

Advanced Analytic Control Techniques for Thermal Systems with Heat Exchangers presents the latest research on sophisticated analytic and control techniques specific for Heat Exchangers (HXs) and heat Exchanger Networks (HXNs), such as Stability Analysis, Efficiency of HXs, Fouling Effect, Delay Phenomenon, Robust Control, Algebraic Control, Geometric Control, Optimal Control, Fuzzy Control and Artificial Intelligence techniques. Editor Libor Pekar and his team of global expert contributors combine their knowledge and experience of investigated and applied systems and processes in this thorough review of the most advanced networks, analyzing their dynamics, efficiency, transient features, physical properties, performance, feasibility, flexibility and controllability. The structural and dynamic analyses and control approaches of HXNs, as well as energy efficient manipulation techniques are discussed, in addition to the design of the control systems through the full life cycle. This equips the reader with an understanding of the relevant theory in a variety of settings and scenarios and the confidence to apply that knowledge to solve problems in an academic or professional setting.Graduate students and early-mid career professionals require a robust understanding of how to suitably design thermal systems with HXs and HXNs to achieve required performance levels, which this book offers in one consolidated reference. All examples and solved problems included have been tried and tested, and these combined with the research driven theory provides professionals, researchers and students with the most recent techniques to maximize the energy efficiency and sustainability of existing and new thermal power systems.

• Analyses several advanced techniques, the theoretical background of these techniques and includes models, examples and results throughout
• Focusses on advanced analytic and control techniques which have been investigated or applied to thermal systems with HXs and HXNs
• Includes practical applications and advanced ideas from leading experts in the field, as well as case studies and tested problems and solutions

Section 1

Fundamentals of heat exchangers

Chapter 1

Introduction to heat exchangers

Libor Pekař Faculty of Applied Informatics, Department of Automation and Control Engineering, Tomas Bata University in Zlín, Zlín, Czech Republic

Abstract

This concise introductory chapter is aimed at providing an unacquainted reader with very basic essentials about heat exchangers. There are two main parts of this chapter. Namely, the definition of heat exchangers and several possible classifications are given first. Afterward, the reader is acquainted with some basic mathematical laws that model the behavior and heat transfer of a general heat exchanger. References to various literature resources are provided so the reader can find more detail therein.

Keywords

Classification; Fourier's law; Heat exchangers; Heat exchanger construction; Heat exchanger types; Heat transfer rate; Logarithmic mean temperature difference; Newton's cooling law

1 Introduction

This concise introductory chapter is aimed at providing an unacquainted reader with very basic essentials about heat exchangers (HXs). It is definitely not intended to be exhaustive. There are two main parts of this chapter. Namely, the definition of HXs and several possible classifications are given first. Afterward, the reader is acquainted with some basic mathematical laws that model the behavior and heat transfer of a general HX. References to various literature resources are provided so the reader can find more detail therein.

A HX is a heat transfer device that exchanges heat between two or more process fluids, at different temperatures, and in thermal contact [1–3]. In HXs, heat transfer takes place from a high-temperature fluid to a low-temperature fluid. Usually, the phase of the fluids is not changed during the heat transfer. Besides heat conduction, thermal convection and radiation apply, which indicates that it is a complex process. HXs have many domestic and industrial applications, such as in building heat and air conditioning systems, refrigeration units, steam power plants, chemical processing plants, transportation power systems, etc. [3].

HXs can be classified according to their transfer processes, flow arrangement, fluid phase, and geometric construction [2]. Several possible classifications are concisely given to the reader in the following section. As HXs transfer thermal energy between fluids, a very basic mathematical and physical background of the heat transfer is provided as well [4–6].

2 Heat exchangers classification

As mentioned before, there are several ways to classify HXs. In addition, several authors use diverse points of view to which the XHs are classified. Therefore, the presented classification cannot be unique, and the reader may find many other approaches to HX categorization.

2.1 Classification according to the functional point of view

Kothandaranman [7] divides HXs into the following three groups according to their functioning.

1. (i) Recuperative HXs
2. (ii) Regenerative HXs
3. (iii) HXs with direct mixing

Note that some authors subsume these classifications under the constructional point of view (see, e.g., [3, 8]). The arrangement of HXs in groups according to their geometric construction features is given in Section 2.4.

2.1.1 Recuperative HXs

Recuperative HXs (or recuperators) have separated flow paths for each fluid, which flow simultaneously th...

Table of contents

• Cover image
• Title page
• Table of Contents
• Copyright
• Contributors
• About the editor
• Preface
• Acknowledgments
• Section 1: Fundamentals of heat exchangers
• Section 2: Modeling and parameter identification for heat exchangers
• Section 3: Stability and dynamic behavior analysis
• Section 4: The efficiency of heat exchangers
• Section 5: The effect of fouling
• Section 6: Time-delay phenomenon
• Section 7: Fuzzy logic and artificial intelligence in heat exchanger design and control
• Section 8: Other modern control approaches
• Section 9: Optimal design and multiobjective optimization techniques
• Section 10: Applications of recent analytic and control methods for heat exchanger systems
• Index