Specification of Combined Convection And Radiation
The equipment consists of a centrifugal fan with a vertical outlet duct at the top of which is mounted a heated cylinder. The mounting arrangement for the cylinder in the duct is designed to minimize loss of heat by conduction to the wall of the duct.
The surface of the cylinder is coated with heat resistant paint which provides a consistent emissivity close to unity. A K-type thermocouple attached to the wall of the cylinder, at mid position, allows the surface temperature to be measured under the varying operating conditions.
A variable fan blows air through the outlet duct and a vane type anemometer within the fan outlet duct allows the air velocity in the duct to be measured. The fan is a variable speed fan with electronic control. On a manually adjustable throttle plate allows the air velocity to be varied.
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