THE APPLICATIONS OF THERMAL CONDUCTIVITY
TABLE OF CONTENTS
Title Page – – – – – – – – – i
Certification – – – – – – – – – ii
Dedication – – – – – – – – – iii
Acknowledgements – – – – – – – iv
Table of Contents – – – – – – – – v
CHAPTER ONE
1.0 Introduction – – – – – – – – 1
1.1 Background of the Study – – – – – – 1
CHAPTER TWO
2.0 Thermal Conductivity – – – – – – 3
2.1 Heat Energy – – – – – – – – 4
2.2 Temperature – – – – – – – – 5
2.3 Heat Energy Transfer – – – – – – 5
2.3.1 Thermal Conduction – – – – – – 6
2.3.2 Convection – – – – – – – – 6
2.3.3 Radiation – – – – – – – – 7
2.4 Factors Affecting Thermal Conductivity – – – 9
2.4.1 Temperature – – – – – – – – 9
2.4.2 Thickness of the Material – – – – – – 9
2.4.3 Cross-Sectional Type – – – – – – 10
2.4.4 The Type of Material – – – – – – 10
2.4.5 Length of the Material – – – – – – 10
CHAPTER THREE
3.0 Application of Thermal Conductivity – – – – 11
3.1 Industry – – – – – – – – 11
3.2 Engineering – – – – – – – – 12
3.3 Laboratory – – – – – – – – 13
CHAPTER FOUR
4.0 Summary and Conclusion – – – – – 14
4.1 Summary – – – – – – – – 14
4.2 Conclusion – – – – – – – – 14
References
CHAPTER ONE: INTRODUCTION
1.1 Background of the Study
The flow of heat energy between two bodies in thermal contact takes place when there is a temperature difference. Temperature measures the degree of hotness and coldness of a given substance or surrounding and is defined as the average kinetic energy of the particle of a substance. Particle of a substance with higher temperature tends to move about with high speed from one region to another. The movement of high temperature particle give rise to heat flow (Michael et al., 2018). In building design, one of the factor under consideration is the way through which the temperature of a building increase above normal is by thermal conduction of heat through the concrete mixture.
Thermal conductivity is defined as the amount of heat per unit time. The thermal conductivity of a material is a measure of its ability to conduct heat. It is commonly denoted by K, (Kondepudi, 2018).
K = QL – – – – (i)
A∆t
Where;
Q is the rate of energy transferred
L is the thickness of the material
A is the cross sectional area of the material
∆t is the difference in the temperature
K is the thermal conductivity
