Composite Wall Apparatus.

The apparatus is designed to determine total Thermal Conductivity of a composite walls and to plot temperature gradient along the composite wall structure. The Experimental set up consists of a central mica heater sandwiched between two sheets. Three types of identical slabs are provide on both sides of heater which forms a composite structure. A small hand press is provided to ensure the perfect contact between the slabs. Digital Ammeter and Voltmeter is provided to measure the heater input and a dimmer stat is provided to vary the input. Thermocouples are embedded between interfaces of the slabs to measure the temperatures at respective surfaces. The experiments can be conducted at various values of input and calculations can be made accordingly.

Specifications:

• Composite wall asslly. consisting of - M.S., Bakelite and Press wood plates of 200 mm dia.
• Heater - Nichrome wire heater wound on mica sandwiched between two aluminum plates.
• Enclosure for Assembly with Perspex window.
• Thermocouples to measure temperature.

Instrumentation & Controls :

• Digital Voltmeter - 0 - 199.9 Volts.
• Digital Ammeter - 0 - 1.999 Amp.
• Multy channel Digital Temperature Indicator.
• Heater Control.

Service Required :

• 230 V.A.C. stabilised supply with earthing.
• Floor space - 1.5m X 1.5 m at working height.