1Department of PhysicsHong Kong Baptist University

Experimental Demonstrations(Thermodynamics)

Physics Enhancement ProgrammeDr. M.H. CHAN

Department of Physics, HKBU

2Department of PhysicsHong Kong Baptist University

Seebeck Effect

• The Seebeck effect refers to the generation of potential difference due to a temperature gradient (different temperatures) between two dissimilar electrical conductors.– The process is reversible. – Allow conversion from heat to electricity, and conversion from electricity to the temperature gradient between two surfaces.

3Department of PhysicsHong Kong Baptist University

Peltier Heat Pump

Battery

Peltier Element

4Department of PhysicsHong Kong Baptist University

DemonstrationCopper and Aluminium

5Department of PhysicsHong Kong Baptist University

Demonstration: Generation of Thermoelectric Voltage

6Department of PhysicsHong Kong Baptist University

Demonstration: Thermoelectrics

7Department of PhysicsHong Kong Baptist University

Schematic Diagram of Thermoelectric Device 

8Department of PhysicsHong Kong Baptist University

Applications and Demonstrations:Thermoelectric Devices

9Department of PhysicsHong Kong Baptist University

Body heat powered LED and Fan.

Waste water heat recovery to generate electricity.

10Department of PhysicsHong Kong Baptist University

Demo: Stirling Engine