transport phenomena in chemical processes part iv * michał araszkiewicz phd * heat transfer, a...
TRANSCRIPT
Transport phenomena in chemical processes
part IV*
Michał Araszkiewicz PhD
* Heat transfer, a modern approach, Martin Becker, Plenum Press, 1986
HEAT TRANSFER
Power plant
Engine
Building with insulation
Cold liquid vessel.
Heat transfer
1. …2. …3. …
Ad 1. Heat can move through static material by interaction with the structure of the body.
That phenomena we call:
Ad 2. Heat can be carried from one place to another by movement of a fluid.
That phenomena we call:
Ad 2. Heat can be transfered through space even without intervening material.
That phenomena we call:
Fourier law
Fourier law
Hot Cold
x
A - area Solid wall
Thermal conductivity - solid materials
Thermal conductivity - fluids
Thermal conductivity - gases
Basics of convection
Basics of convection
Thermal convection
Forced convection
That process requires the stimulation of fluid with external agents like pump, which provides the motion to the fluid.
Natural convection
Hot surface
Radiation heat transfer
Radiation heat transfer
To be continued…