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CAT NO: DIDACTICNLE-Export-185003
Composite Wall Apparatus.
Composite Wall Apparatus
The Composite Wall Apparatus is designed for study of Heat
transfer through composite slab made up of different materials. Since
each material has different thermal conductivity, heat transferred
through each of them is different. Using different Heat transfer
correlations we can determine the thermal conductivity of entire slab as
a single wall.The equipment consists of slab made up of different
materials with heater sandwiched at its centre. The slab materials are
Cast iron, Bakelite and press wood. The slabs are circular in cross
section. Heating element is also circular in shape. In order to ensure
equal rate of heat flow from both sides of heating element, the heating
element is sandwiched between two identical sets of composite slabs. In
order to remove the air gaps between the plates, the composite slab is
kept pressed in between two pressure plates (M.S. plates) with the help
of a screw arrangement. Instruments provided include sensors for
measuring temperatures at different points, indicators to measure power
supplied to the heater.
Specifications:
Composite Slab: Slab of three different materials Steel, Pressed Wood & Bakelite with embedded Electric heater
Wooden Cabinet: Cabinet with glass door on front side for housing the slab
Electric Heater: Disk Type Heater, Capacity 300 W, Supply 230 V AC
Dimmer: Range 0-250 V AC, 2 A
Digital Voltmeter: Range 0-500 V AC
Digital Ammeter: Range 0-2 A AC
Temperature Sensors: Type ‘K’ Thermocouples – 7 Nos
Temperature Indicator: 8 Channel Indicator with Selector Switch, Range 0-400 °
Frame: Made of M.S. Square Tubes & Sheets, Welded & Powder coated
Experimental Capabilities:
Determination of thermal conductivity of slab of composite material
Comparison of calculated value of thermal conductivity with actual value
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