Transport phenomena in chemical processes part IV * Michał Araszkiewicz PhD * Heat transfer, a modern approach, Martin Becker, Plenum Press, 1986.

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Presentation 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

Hot Cold x A - area Solid wall

Thermal conductivity - solid materials

Thermal conductivity - fluids

Thermal conductivity - gases

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

To be continued…