Heat Transfer in Forced Convection Apparatus

This system is designed to study the thermal radiation of a given two identical specimen (made out of homogeneous material) one with black coating and other without coating. This system helps students to study the emmisivity of non-black surface during the charge. The setup consists of two circular brass plates identical in size and is provided with heating coils at the bottom. One of the brass plates is coated black in colour, which is called black body and the other gray body. The plates are mounted on asbestos cement sheet and surrounded by a wooden enclosure so as to provide undisturbed natural convection surroundings. The heat input to the heater is varied by Variac and is measured by Ammeter & Voltmeter. A temperature indicator with a selector switch is provided to measure the various temperatures of the specimen