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
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
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
onstant 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.
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.