Thermal Conductivity Apparatus

The apparatus consists of a vertical stack of specimens clamped between an electrically heated source at the top and a water cooled base, all contained within a Dewar vessel and furnished with a radiation shield and anti convection baffle. The heating current is supplied from a variable voltage power pack and displayed on a digital ammeter. The specimens are fitted with very small thermocouples at known distances apart and connected via a selector switch to a digital temperature readout. Cooling water is supplied from the constant head water tank mounted above the Dewar vessel. The water cooled base is designed as a calorimeter to measure the heat flow and fitted with very accurate thermometers in the water circuit.

Experimental Capability:
To demonstrate that heat flow is directly proportional to cross sectional area  
To determine the thermal conductivity of insulation materials
To derive the thermal conductivity of materials of high thermal conductance
To demonstrate that heat flow is directly proportional to temperature differences between specimen faces.