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2020 | Book

The Way of Problem Solving in Thermal Engineering Read chapter Read first chapter

Solving Problems in Thermal Engineering

A Toolbox for Engineers

Authors: Dr. Viktor Józsa, Dr. Róbert Kovács

Publisher: Springer International Publishing

Book Series : Power Systems

Part of: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik"

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About this book

This book provides general guidelines for solving thermal problems in the fields of engineering and natural sciences.

Written for a wide audience, from beginner to senior engineers and physicists, it provides a comprehensive framework covering theory and practice and including numerous fundamental and real-world examples. Based on the thermodynamics of various material laws, it focuses on the mathematical structure of the continuum models and their experimental validation. In addition to several examples in renewable energy, it also presents thermal processes in space, and summarizes size-dependent, non-Fourier, and non-Fickian problems, which have increasing practical relevance in, e.g., the semiconductor industry. Lastly, the book discusses the key aspects of numerical methods, particularly highlighting the role of boundary conditions in the modeling process.

The book provides readers with a comprehensive toolbox, addressing a wide variety of topics in thermal modeling, from constructing material laws to designing advanced power plants and engineering systems.

Table of Contents

Frontmatter
Chapter 1. The Way of Problem Solving in Thermal Engineering
Abstract
The role of the first chapter is the presentation of the toolbox of problem solving in detail. It can be used from your very first individual thermal project to your DSc degree in research or a group leader position in the industry. Hence, the focus here is on the way of thinking over direct problems. Before jumping into numerical modeling, several questions have to be answered. Even though each one seems obvious, nevertheless, neglecting them may significantly bias the calculation results. The second part of the chapter focuses on measurement data used for validation. It summarizes the fundamentals of sensor calibration and data uncertainty, also discussing the calculation of correlated quantities. However, these procedures often performed by technicians and engineers, it is crucial to know that the data measured by those sensors represent the quantity of interest with known uncertainty.
Viktor Józsa, Róbert Kovács
Chapter 2. General Aspects of Thermodynamical Modeling
Abstract
Solving a thermal problem means a solution of a mathematical model that governs the process and describes its time evolution. The thermodynamic background of these mathematical models is discussed in the present chapter. There are two building blocks of such a model. The first block consists the well-known balance equations such as the mass, momentum, and energy. The second one is the so-called constitutive relation, which tells us ‘how a material behaves’. This chapter is about their thermodynamic background.
Viktor Józsa, Róbert Kovács
Chapter 3. Applications in Renewable Energy
Abstract
We are living in the age of the energy crisis. To survive ourselves, it is crucial to find highly efficient technologies and change from the current fossil fuel-heavy energy mix to renewable-based energy generation. The present chapter highlights three main fields: solar and wind energy utilization and combustion. Then the last section briefly discusses the building blocks of thermal power cycles. These selected topics provide a versatile knowledge to the reader to identify the waste heat sources and find a proper solution that harvests it. Each of the first three sections features a deeply discussed, solved thermal problem, and the last section includes the key equations to allow the reader to perform initial calculations on the key components of a thermal cycle.
Viktor Józsa, Róbert Kovács
Chapter 4. Thermal Processes in Vacuum
Abstract
The dominant heat transfer mode in vacuum is thermal radiation which is emphasized in the present chapter. Besides its relevance in space exploration, several industrial processes and commercial products use vacuum directly or its production require a technological process under vacuum. Firstly, the fundamentals of thermal radiation are briefly discussed to highlight the governing parameters of the process. Then the available thermal control methods are introduced with supporting examples. Finally, the thermal design and analysis of the SMOG-1 PocketQube class satellite is detailed, performed by the authors of this book.
Viktor Józsa, Róbert Kovács
Chapter 5. Nature Knows Better
Abstract
This chapter focuses on the experimental background of extended constitutive equations, especially on non-Fourier heat conduction. Although these phenomena are not common in engineering practice nowadays, it conveys essential aspects and provides guidance for ‘special’ thermal and coupled problems. It is anticipated that the advanced material models will appear in the commercial codes as the thermal modeling of micro and nano-scaled objects become increasingly important.
Viktor Józsa, Róbert Kovács
Chapter 6. Notes on the Solutions of PDE Systems—Duality Between Two Worlds
Abstract
In the engineering practice, most of the problems are solved using a commercial software such as finite element codes. In parallel, these software behave like a ‘black box’, offering only minimal insight into what equations are solved at the background. This is crucial in some problems, mainly when a non-classical (extended) material model must be applied. Using commercial software makes the treatment more rigid and limited, which is sometimes not the most efficient tool. Thus it could be necessary to write your code to obtain the solution. This chapter introduces the reader into the fundamental aspects of numerical (and analytical) methods and presents the properties of some particular numerical schemes, for instance, stability, dissipation, and dispersion.
Viktor Józsa, Róbert Kovács
Backmatter
Metadata
Title
Solving Problems in Thermal Engineering
Authors
Dr. Viktor Józsa
Dr. Róbert Kovács
Copyright Year
2020
Electronic ISBN
978-3-030-33475-8
Print ISBN
978-3-030-33474-1
DOI
https://doi.org/10.1007/978-3-030-33475-8