:: CONVECTION SECTION :: PIN FIN APPARATUS Demonstrates experiments with fins in natural and forced convection and various flow rates, various heat inputs and with fins of different material. Unit consist a pin type fin, heated by a heater, blower draws air over the fin,Thermocouple measures temperature. Fins- Brass, Aluminium and M.S.Control panel with necessary instruments, Air flow duct with blower.The unit is provided with antirust an attractive powder coating     NATURAL CONVECTION To study over all heat transfer coefficient and local heat transfer coefficients in natural convection at various heat transfer rates. Vertical brass pipe heated by heater, the pipe looses heat to atmosphere by natural convection. It is filled in an enclosure to provide undisturbed natural convection currents. Thermocouple to measure local temperature. Control panel with necessary measuring instruments.     FORCED CONVECTION APPARATUS To calculate local and over all heat transfer coefficient in forced convection at various air flow rates and various heat flux values. The unit consists of a circular pipe loosing heat by forced convection to air, being forced through it. constant heat flux is added to pipe by heater provided with input control. Thermocouple to measure a various pipe surface temperature and air inlet and outlet of test section. The unit is provided with antirust an attractive powder coating     SPECIFIC HEAT OF AIR APPARATUS. To determine the specific heat of air at different temperatures air quantity and heater input can be varied. A blower delivers the required quantity air, air passing through the pipe, heated by heater, temp of entering and leaving test section are measured by thermocouples. By knowing heater input and mass flow of air, specific heat of air at constant pressure can be calculated.     HEAT TRANSFER IN AGITATED VESSEL To study overall heat transfer coefficient and effect of agitator speed and water flow through coil. a stainless steel vessel, inside which copper tube helical coil is fitted, fluid in the vessel is kept at desired temp, cold fluid picks up heat from surrounding hot fluid. varic to vary agitator speed and to vary input to heaters.   :: RADIATION SECTION  :: EMISSIVITY MEASUREMENT APPARATUS The unit consists a test plate and a black plate, as a comparator, all the physical properties,dimensions, & temp. are equal, heat losses from the both plates are same except radiation losses. Input difference will be due to difference in emissivity. Input given through separate dimmer so temp. of both can be kept equal. Emissivity can determined over a wide range of temperatures. The unit is provided with antirust an attractive powder coating     STEFAN BOLTZMANN APPARATUS Determination of Stefan Boltzmann, constant, consists of a hemisphere surrounded by hot water obtained from a water heating tank. Blackend disc is inserted at the center of hemisphere. Heat is transferred into the disc from the hemisphere by radiation & its temperature begins to rise & Stefan Boltzmann constant is determined.     HEAT TRANSFER THROUGH VACUUM Determination of heat transfer in radition or Stefan boltzmann. leak tight evacuated cylinder provided with heater at center, heat given by heater is transmitted to cylinder wall & wall temperature raise, which is kept steady by circulating water. If Stefan boltzmann constant is assumed to be known, then heat transfer can be shown proportional fourth power of temp. if heat transfer is known, Stefan boltzmann constant is determined Control panel with necessary measuring instruments.

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