Heat Transfer (Q) Data Sheet

Heat Transfer (Q) Data Sheet
The science of thermodynamics deals with the amount of heat transfer as
a system undergoes a process from one equilibrium state to another, and
makes no reference to how long the process will take. But in engineering,
we are often interested in the rate of heat transfer, which is the topic of
the science of heat transfer.
We start this chapter with a review of the fundamental concepts of thermodynamics
that form the framework for heat transfer. We first present the
relation of heat to other forms of energy and review the first law of thermodynamics.
We then present the three basic mechanisms of heat transfer, which
are conduction, convection, and radiation, and discuss thermal conductivity.
Conduction is the transfer of energy from the more energetic particles of a
substance to the adjacent, less energetic ones as a result of interactions between
the particles. Convection is the mode of heat transfer between a solid
surface and the adjacent liquid or gas that is in motion, and it involves the
combined effects of conduction and fluid motion. Radiation is the energy
emitted by matter in the form of electromagnetic waves (or photons) as a result
of the changes in the electronic configurations of the atoms or molecules.
We close this chapter with a discussion of simultaneous heat transfer.