Ch1-Introduction - Chapter 1 Introduction Basic Concepts...

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Chapter 1 Introduction
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Basic Concepts Heat: Energy that can be transferred from one system to another as a result of temp. difference. Thermodynamics is concerned with the amount of heat transfer as a system undergoes a process from one equilibrium state to another. However, in practice we are more concerned about the rate of heat transfer (heat transfer per unit time) than we are with the amount of it. Example: How long will it take for hot coffee to cool down from 90 ° C to 80 ° C? Heat Transfer Determination of rates of heat transfer (cooling/heat time) Variation of temperature In contrast to thermodynamics, which deals with equilibrium states, heat transfer deals with the systems that lack thermal equilibrium and thus it is a non-equilibrium phenomenon.
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Some Applications of Heat Transfer Buildings Daily life Electronics Heat exchangers Combustion Solar energy
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Human Body
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Conduction: Heat transfer in a solid or a stationary fluid (gas or liquid) due to the random motion of its constituent atoms, molecules and /or electrons. Convection:
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Ch1-Introduction - Chapter 1 Introduction Basic Concepts...

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