The device consists of a slab assembly where a main heater and a radial guard heater are positioned between two copper plates. The test specimen is placed between water-cooled plates, with slabs of equal thickness on either side of the heaters. The radial guard heater ensures that the entire heat generated by the main heater flows axially through the specimen to the cooling plates. By measuring the heat input and the temperature difference across the specimen, its thermal conductivity can be accurately determined. The entire setup is enclosed within a well-insulated casing to minimize external interference. The design adheres to approved INDIAN standards, though there may be minor size variations.

Experimental Objective 

Determination of the thermal conductivity of insulating slab material.
Study of how the material’s thermal conductivity varies with temperature.

Specifications

a) Main heater plate: 110 mm diameter, with a mica heater sandwiched between copper plates.

b) Radial guard heater plate: 120 mm I.D. and 200 mm O.D., featuring a mica heater between copper plates.

Two water-cooled cooling plates included.

Two independent 2A dimmer stats for precise control of heater inputs.

230 V AC stabilized power supply with proper earthing.

Water supply flow rate of approximately 4 to 5 liters per minute.

Bench space required: 1 m × 1 m × 0.5 m (height).