DESCRIPTION:   

This apparatus is designed to determine the thermal conductivity of insulating powder. The apparatus consists of two thin walled concentric copper spheres.  Inner sphere houses Nichrome Wire heater. Insulating powder is filled between the two spheres.  Heat flows radically outwards. Temperature sensors at proper positions are fitted to measure surface temperatures of spheres.   Heat input to the heater is given through a variac and measured by Digital Voltmeter & Digital Ammeter.  By varying the heat input rates, data can be obtained.

EXPERIMENTATION:

Determination of thermal conductivity of insulating powder.

Comparison of thermal Conductivity of insulating powder at different temperatures.

UTILITIES REQUIRED

Electricity Supply: 1 Phase 220 V AC 2 Amps.

Table for set-up support.

TECHNICAL DETAILS:

Inner Sphere Dia. - 100 mm.

Outer Sphere Dia. - 200 mm.

Heater Nichrome Wire.

Control panel comprising of

Digital Voltmeter 0-300 Volt.

Digital Ammeter 0-2 Amp.

Variac  0-230 V 2 Amps.

Digital Temp. Indicator 0-199.9⁰C with multi-channel switch

Temperature Sensors RTD PT-100 type. (10 Nos.)

With standard make ON OFF switch  L & T Makes  Mains Indicator etc.

Instruction Manual An ENGLISH instruction manual will be provided along With the Apparatus

The whole set-up is mounted on a power coated base plate.