The apparatus consists of Blower unit fitted with the test pipe. Nichrome wire heater

surrounds the test section. Four Temperature Sensors are embedded on the test section,

two placed in the air stream at the entrance and exit of the test section to measure the inlet and outlet air temperature. Test pipe is connected to the delivery side of the blower along with the Orifice to measure flow of air through the pipe. Constant heat flux is given to pipe by an electric heater through a Variac and measured by Digital Voltmeter and Digital Ammeter.

EXPERIMENTS

Ø  To determine average surface heat transfer coefficient for a pipe losing heat by forced convection.

Ø  Comparison of heat transfer coefficient for different airflow rates and heat flow rates.

Ø  To plot surface temperature distribution along the length of pipe

UTILITIES REQUIRED

Ø  Electricity Supply: 1 Phase, 220 V AC, 10Amp.

Ø  Floor area of 1.2mx 0.5m

TECHNICAL DETAILS

The experimental set up consists of metal bar, one end of which is heated by an electric

heater while the other end of the bar projects inside the cooling water jacket. A cylindrical

shell filled with the asbestos insulating powder surrounds the middle portion of the bar. The temperature of the bar is measured at different sections. Heat Input to the heater is given through Variac and measured by Digital Voltmeter & Digital Ammeter. By varying the heat input rates, wide range of experiments can be performed. Water under constant head condition is circulated through the jacket and its flow rate and temperature rise is noted.

EXPERIMENTS:

Ø  To plot the temperature distribution along the length of Bar

Ø  To determine the thermal conductivity of given bar at various temperatures

UTILITIES REQUIRED:

Ø  Water supply 3 lit/min (approx.)

Ø  Drain

Ø  Electricity Supply: 1 Phase, 220 V AC 2 Amp.

TECHNICAL DETAILS:

Insulating Powder Apparatus is designed to determine the thermal conductivity of insulating

 powder. The Apparatus consists of two thin walled concentric copper spheres. Inner

sphere houses Nichrome Wire heating coil. Insulating powder is filled between the spheres. Heat flows radially outwards. Temperature sensors at proper positions are fitted to measure surface temperatures of spheres. Heat input to the heater is given through a Variac and measured by Digital Voltmeter & Digital Ammeter. By varying the heat input rates, wide range of experiments can be performed.

EXPERIMENTS:

Ø  Determination of thermal conductivity of insulating powder

Ø  Comparison of thermal Conductivity of insulating powder at different temperatures

UTILITIES REQUIRED:                                                                                                                                                                              

Ø  Electricity Supply: 1 Phase, 220 V AC, 2 Amps.

TECHNICAL DETAILS:

The apparatus is designed to determine, the Stefan Boltzmann constant. The apparatus

consists of a hemisphere fixed to a Bakelite plate, the outer surface of which forms the jacket to heat it.  Hot water to heat the hemisphere is obtained from a hot water tank, which is fixed above the hemisphere. The copper test disc is introduced at the center of hemisphere. The temperatures of hemisphere and test disc are measured with the help of temperature sensors.

EXPERIMENTS:

Ø  Determination of Stefan Boltzmann constant and study the effect of hemisphere temperature on it

UTILITIES REQUIRED:

Ø  Electricity Supply: I Phase. 220 V AC, 2 kW.

Ø  Table for set­up support

TECHNICAL DETAILS:

The setup is designed to study the heat transfer in a pin fin. It consists of pin type fin fitted

in duct. A fan is provided on one side of duct to conduct experiments under forced draft

conditions. Airflow rates can be varied with the help of damper provided in the duct. A heater

 heats one end of fin and heat flows to another end. Heat input to the heater is given through Variac. Digital Temperature Indicator measures temperature distribution along the fin.

EXPERIMENTS

Ø  To study temperature distribution along the length of fin in both Free & forced convection

Ø  Comparison of theoretical temperature distribution with experimentally obtained distribution

UTILITIES REQUIRED

Ø  Electricity Supply: 1 Phase, 220 V AC, 5 Amps.

Ø  Table for set­up support

TECHNICAL DETAILS

The setup consists of a brass tube fitted in a rectangular duct in a vertical fashion.The duct is

open at the top and bottom, and forms an enclosure and serves the purpose of undisturbed

surrounding. One side of the duct is fitted with a transparent good quality Acrylic window for visualization. An electric heating element is kept in the vertical tube that in turns heats the tube surface. The heat is lost from the tube to the surrounding air by natural convection. The temperature of the vertical tube is measure by Temperature Sensors and displayed by a Digital Temperature Indicator with multi­channel switch. The heat input to the heater is measured by a Digital Ammeter and a Digital Voltmeter and is varied by a Variac. The tube surface is polished to minimize the radiation losses.

EXPERIMENTS

Ø  To determine average heat transfer coefficient

UTILITIES REQUIRED

Ø  Electricity Supply: I Phase, 220 V AC, 2 Amps.

Ø  Table for set­up support

TECHNICAL DETAILS

The present Set­up is designed to measure the emissivity of test plate. The test plate

comprises of a mica heater sandwiched between two circular plates. Black plate is identical  with test plate, but its surface is blackened. As all the physical properties, dimension and temperature are equal; heat losses from both plates will be same except radiation loss. Hence the input difference will be due to difference in emissivity. Both plates are supported on individual brackets in a wooden enclosure with one side glass to ensure steady atmospheric conditions. Temperature Sensors are provided to measure the temperature of each plate and surrounding. Supply is given to heaters through separate Variac so that temperatures of both can be kept equal and is measured with Digital Voltmeter and Digital Ammeter.

EXPERIMENTS:

Ø  Determining the Emissivity of a test plate.

Ø  Study the variation of emissivity of test plate with respect to absolute temperature.

UTILITIES REQUIRED:

Ø  Electricity Supply: 1Phase, 220 V AC, 4 Amps.

Ø  Table for set­up support

TECHNICAL DETAILS:

It is a super­conducting device and involves the transfer of heat by boiling and condensation

of a fluid and hence transfer of heat takes place under nearly isothermal condition. In this

apparatus the comparison of heat pipe with the copper pipe as good conductor of heat and with the stainless steel pipe as same material of construction is made. It consists of three identical cylindrical conductors In respect of geometry. One end of these is heated electrically while there are small capacity tanks acting as heat sinks at the other end. The unit consists of a heat pipe a copper pipe and a stainless steel pipe. Temperature sensors are embedded along the length to measure the temperature distribution and the heat transfer rate is noted in terms of the temperature rise in the heat sink tanks.  The performance of the heat pipe as a super­conducting device can be studied well in terms of the temperature distribution along the length at a given instant and can be compared with other two members. Nearly isothermal temperature distribution and fast rise of temperature in heat sink tank reveals the heat pipe superiority over the conventional conductors.

EXPERIMENTS:

Ø  To demonstrate the super thermal conductivity of Heat Pipe and to compare its working with best conductor i.e. Copper pipe & Stainless steel pipe as same material of construction.

Ø  To plot the temperature v/s time response of three pipes

Ø  To plot the temperature distribution along the length of three pipes

UTILITIES REQUIRED:

Ø  Electricity Supply: 1Phase, 220 V AC, 4 Amp

Ø  Table for set­up support

TECHNICAL DETAILS