Post on 19-Jun-2020
E292 – Fluids and Thermodynamics
Introduction to Heat Transfer
There are three fundamental forms of heat transfer:
Conduction: heat transfer through non-moving materials (solids, confined gases, etc)
Convection: heat transfer through moving materials (liquids, gasses, etc)
Radiation: heat transfer via electromagnetic radiation (light, infrared heat, etc.)
The General Equation of Heat Transfer is:
�̇� = 𝑈𝐴(𝑇2 − 𝑇1), where
U = ‘The’ heat transfer coefficient, W/m2·K
This is the equation that both the conductive and convective
heat transfer equation (above and below) are built upon.
You will need this equation when dealing with the heat
losses/gains through windows and doors and a few other
places.
Only a few of the available materials are listed, on the left. As I am sure you can guess, there are much longer lists
of engineering materials available at aid in the design of any form of heat transfer device you might envision.
Example Conduction & Convection Heat Transfer Through a Plane (Flat) Wall
Thermal Resistance, Heat Transfer Rate & Temperature