R534 Thermo Electric Heat Pump Unit

The R534 is a fully instrumented semi-conductor thermo-electric device demonstrating both power generation and refrigeration from the same bench mounted module.

To demonstrate power generation a low voltage electric heater provides the high temperature energy source, with the DC voltage being supplied by an internally mounted power supply. When the same DC power is supplied to the device, a heat pump or refrigerating effect is generated depending upon voltage polarity.

Used in specialised applications including the cooling of high performance electronics the unit teaches the refrigeration technologies relating to thermo-electric devices.These include: Refrigeration Effect, Generating Effect, Heat pump Effect, Lenz and Seebeck Effects.

Panel: High quality glass reinforced plastic on which the following components are mounted.

Module Assembly:  Semi-conductor, thermo-electric device with hot and cold side thermometer pockets and insulated heater.

Voltmeters (3):  Moving coil instruments

(2)  Range 0 to 5 Volts

(1)  Range 0 to 1.5 Volts

Ammeters (3):  Moving coil instruments

(2)  Range 0 to 15 Amps

(1)  Range 0 to 250 Milli Amps

Thermometers (3):  300 mm liquid filled glass

(1)  Range – 100 to +110oC

(1)  Range        0 to   150oC

(1)  Range    - 50 to     30oC

Rheostats (2):  Rotary triple graded with silver graphite brush

Switches (4):  Multi-pole change over switches

Power Supply:  Internally mounted. Single transformer, full wave rectifier and capacitor smoothing.  Provides a DC supply of approximately 5 volts.

Safety Features:  All electrical components earthed and mains supply fused.  Both module and heater operate on a safe low voltage DC supply.

  • Investigation of the effects upon the surface temperature of either face of the module with increasing power supply (Peltier Effect).
  • Investigation of the effect upon heat transfer of reversing the polarity of the power supply (Thomson or Lenz Effect).
  • Investigation of the variation in open circuit voltage across the module due to the variation in surface temperature difference (Seebeck Effect).
  • Investigation of the power generating performance of the module with a steady load and increasing temperature difference.
  • Estimation of the coefficient of performance of the module when acting as a refrigerator.


A:  300W 220/240 Volts, Single Phase, 50Hz. (With earth/ground)


B:  300W 110/120 Volts, Single Phase, 60Hz. (With earth/ground)