Heat Transfer Lab | Thermal Conductivity of Insulating Powder Thermal Conductivity of Metal Rod | Thermal Conductivity of Liquid | Heat Transfer from a Pin Fin | Heat Transfer in Forced Convection | Heat Transfer In Natural Convection | Emmissivity Measurement Apparatus | Heat Transfer through Composite Walls | Heat Transfer through Lagged Pipe | Stefan Boltzman Apparatus | Shell and Tube Heat Exchanger | Parallel Flow and Counter Flow Heat Exchanger | Thermal Conductivity by Guarded Hot Plate | Critical Heat Flux Apparatus | Drop and Film Apparatus | Heat Pipe Apparatus | Unsteady State Apparatus (Plain Tube Pipe) | Heat Transfer through Mass | Plate Type Heat Exchanger | Vertical Condenser Test Rig Home | Supersonic Electronics | Leading manufacturers of educational equipments in India | International Quality | Mr. Dayanand Bapat | Mrs. Swati D. Bapat | Educational Equipments

Specification

  • Inner sphere dia – 100mm.
  • Outer sphere dia–200mm
  • Heater-Nichrome wire sandwiched between mica sheets.
  • Control Panel consisting of
  • Voltmeter : 0 – 200 Volts
  • Ammeter : 0 – 2 Amp
  • Dimmer stat : 0 – 2 Amp
  • Digital Temperature Indicator, 0-300° C with chromel alumel thermocouples.

Range of Experimentations

Observation of Gyroscope behavior (Two Laws of Stability)

Experimental justification of the equation T= I. W. Wp

Specification

  • Metal Bar copper - 25 x 430 mm long (approx)
  • Insulating powder shell – 200mm dia (approx)
  • Cooling water chamber – 100mm dia x 75 mm Long (approx)
  • Control Panel Comprising of–
    a) Voltmeter : 0 – 200 Volts.
    b) Ammeter : 0 – 2Amp
    c) Digital Temperature Indicator, 0-300° C
    d) Dimmerstat : 0 – 240 volts with Chromel
    Allumel thermocouples, cold junction compensation. Stop clock, measuring flask for flow measurement.

Range of Experimentations

  • Determination of temperature distribution along the length of given bar.
  • Determination of thermal conductivity of given bar at various temperatures.
  • Determination of thermal conductivity of any metal bar other than supplied by proper 2 Amp
  • fitting of bar in the unit.

Specification

  • Test setup hot plate assembly. cold Plate Assembly. Ring Guard heater Assembly. Top Guard heater assembly. Coolant water circulation system. Thermocouples (Fe-CN) on Hot plate, Cold plate and Guard heaters.
  • Insulation bags. Enclosure box with leveling screws.
  • Power supply arrangement for Hot plate & Guard heater.
  • Control Unit Main ON/OFF Switch. Dimmers for Hot plate and Guard heater
  • Power Control of 2 Amps. Capacity each.
  • Voltmeter and Ammeter for Power measurement.
  • Multi channel Temperature Indicator 0-300°C with high accuracy.

Specification

  • Fin – 12.5 mm (approx) 15 cm. Long (approx). One each of mild steel, Aluminum and brass. Duct size – 10 cm x 15 cm x 80 cm long Blower of suitable capacity with 0.5 H.P. single phase motor.
  • Heater – Nichrome wire type bank heater of suitable capacity
  • Control panel comprising of :
    a) Voltmeter – 0 – 200 Volts.
    b) Ammeter – 0 – 2 Amp.
    c) Dimmer stat for heater 0-230 Volts 2 Amp.
    d) Temperature indicator – 0 – 300°C with 10°C least count. Using chromel alumel thermocouples, provided with cold junction compensation. Orifice meter on blower outlet with water manometer.
    Fins of other materials can be supplied at extra cost.
  • Speed Control Unit : A Dimmer stat of 2 Amp capacities

Range of Experimentations

To study of temperature distribution along the length of fin in both natural 7 forced convection. Comparison of theoretical temperature distribution with experimentally obtained distribution. Comparison of performance of fins of various materials supplied.

Specification

  • Dia & length of test section – 28 (Approx.) x 40 cms.
  • No. of thermocouples – 6 Nos.
  • Nichrome heater of suitable capacity.
  • Blower 0.5 H.P. with motor with 12” of WGP.
  • Orifice & U tube manometer
  • Control Panel comprising of
    i) Dimmer stat 240 V, 2 Amp,. A.C.
    ii) Voltmeter 0 - 200 V., A.C. iii)Ammeter 0 - 200 V., A.C, iv)Digital Temperature indicator 0 to 300°C using Chrome-l Allumel thermocouples, provided with cold junction compensation.

Range of Experimentations

  • To determine average surface heat transfer coefficient for a pipe losing heat by forced convection.
  • Comparison of heat transfer coefficient for different air flow rates & heat flow rates.
  • To calculate Reynolds number and Nusset number for each experimental conditions.
  • To plot surface temperature distribution along the length of pipe

Specification

  • Enclosure size :20 cm x 20 cm x 75 cm.
  • 20 cm x 20 cm x 75 cm. (O. D.) x 50 cm Long
  • Nichrome heater (Cartridge type)
  • Control Panel Comprising of:
    I) Voltmeter – 0 – 200 V
    ii) Ammeter – 0 – 2 Amp
    iii) Dimmerstat - 0 - 2Amp, 240V
    iv) Digital Temperature Indicator 0-300°C Chromel All umel the rmocouples provided with cold junction compensation.

Range of Experimentations

To determine average surface

Heat transfer coefficient for losing heat by forced convection.

Comparison of heat transfer coefficient for different air flow rates & heat flow rates.

To calculate Reynolds number and Nusselt number for each experimental condition.

To plot surface temperature distribution along the length of pipe.

Specification

  • Test plate & Reference plate size – 160mm dia.
  • Enclosure with one side of Perspex sheet.
  • Heater- 200v, 400 watt, Nichrome wire type Sandwiched between mica sheets.
  • Control panel consisting of –
  • Voltmeter– 0–200 V
  • Ammeter – 0 – 2 Amp
  • D. P. D. T. Selector switches for
  • voltmeter & ammeter.
  • Digital Temperature indicator 0-300°C. Using Chromel - Alumel thermocouples provided.
  • Dimmer stats for test plate and black plate.

Range of Experiments:

  • Determination of Emissivity of non black Surface.
  • Study of variation of Emissivity of test plate with respect to absolute temperature.

Specification

  • Slab size :
  • M.S.- 300mm x 25mm thick 2nos. Press Wood - 300mm x 12mm thick 2nos.
  • Bakelite - 300 mm x 19 mm thick 2nos.
  • Nichrome heater of suitable capacity.
  • Control Panel comprising of –
  • i)Voltmeter 0 - 200 Volts
  • ii)Ammeter 0-2 Amps.
  • iii)Dimmer stat 0-230Volts, 2Amps.
  • Digital temperature indicator 0- 200°C using Chromel - Alumel thermocouples cold provided with cold junction compensation.
  • Wooden cabinet of suitable size to accommodate the slab assembly with hand screw press.

Specification

  • Pipes Length of Pipes – 1m (approx).
  • M. S. Pipe inside – 5cm dia. approx, M. S. Pipe Middle 10cm dia (approx).
  • Pipe Outer – 10cm Control Panel consisting of Voltmeter- 0 - 200 Volts.,
  • Ammeter – 0 – 2 Amp.
  • Dimmer stat for heater, 0 - 230 Volts, 2 Amp.
  • Digital Temperature indicator, 0-300°C using Chromel- Allumel thermocouples, provided with cold junction compensation. Nichrome cartridge heater of suitable capacity and length.

Range of Experiments:

  • To determine heat flow rate through lagged pipe and compare it with the heater input for known values of thermal conductivity of lagging material.
  • To determine thermal conductivity of lagging material by assuming input to be heat flow rate.
  • To plot temperature distribution across lagging material.

Specification

  • Hemisphere dia – 200 mm (approx).
  • Jacket disc - 250 mm.
  • Test disc size – 20 mm dia x 1.5mm thickness.
  • Water tank of sufficient capacity with a 1.5 kw immersion heater.
  • Control Panel comprises of :-
    i) Supply for heater.
    ii) Digital temperature indicator 0-200°C using Chormal- Alumel thermocouples, provided with cold junction compensation.
    iii) Built in timer for temperature readings at 5 seconds interval.

Range of Experiments:

  • Determination of Stefan – Boltzmann constant.
  • Study of effect of hemisphere temperature on the constant.

Specification

  • Shell-
    Material -M. S.
    Inner dia 208mm
    Thickness 6mm
    Length 500mm
  • 25% cut baffles at 100mm distance - 4nos.
  • Tubes
    Material - Copper
    I. D. - 13mm
    O. D. - 16mm
    Length of tubes - 500mm
    Number of Tubes - 16
  • Thermometers- 10-0- to 110°C - 2nos.
  • Geysers - 230 V A. C. 3kw. - 1 nos.
  • Pulley and weight set for applying the torque weight set 200 gm, 500 gm, 1 kg
  • Recorder – Paper roll with reciprocating pen.
  • Small Motor to mounting bucket with ball bearings.
  • Flywheel mounting bracket with ball bearings.

Range of Experiments:

  • Determination of heat transfer coefficient for inner and outer surface of tubes.
  • Study of variation of heat transfer coefficient with the type of flow.

Specification

  • Length of Heat Exchange 1.6 m Outer late material G. I.
  • I. D. – 27.5mm O. D. – 33.8mm
  • Inner tube material – Copper O.D, 12.7mm
  • Thermometer 0° to 200°C–1nos.
  • Geyser – Instantaneous type.3kw capacity – 1 no
  • Measuring flask – 1000 with stop clock.
  • Torque arm with dead weights for measurement of friction torque fixture for measuring bearing radial clearance.

Range of Experimentation

Determination of overall heat transfer coefficient for a tube –in – tube type heat transfer. To calculate

Rate of heat transfer

Theoretical overall heat transfer co-efficient.

To compare the performance of Parallel flow & Counter flow heat exchanger.

Specification

  • Central Heater – suitable capacity, with 100 mm dia. sandwiched between two copper plates.
  • 180 mm mica heater Sandwiched between two copper plates Cooling chamber with water circulation arrangement.
  • Specimen –6 to 20 mm thick, 180 dia.
  • Glass wool bag insulation around the set-up
  • A Control Panel comprising of –
    a)Voltmeter – 0 – 200 Volts
    b) Ammeter – 0 – 2 Amp
    c) Dimmer stat for central & guard heater 0 – 240 Volts 2 Amp – one
    d) Digital Temperature indicator 0 - 200°C with using Chromel – Allumel thermocouples, provided with cold junction compensation.

Range of Experiments:

  • Determination of Thermal conductivity of insulating Material in the form of slab.
  • Study of variation of Thermal Conductivity of the material with temperature.
  • Comparison of Thermal conductivities of various insulating Materials.

Specification

  • Voltmeter 0 - 200 Volts
  • Ammeter 0 - 5 Amp
  • Cylindrical glass Vessel diameter 200mm approx.
  • Cylindrical glass Vessel height 125mm approx.
  • Bulk Heater - Nichrome Coil.
  • Test Heater - Nichrome Wire.
  • Thermometer - 10° to 100°C
  • Two successive regions of pool boiling phenomenon namely:
  • Natural Convection Boiling and.
  • Nucleate Boiling. Can be visualized up to the critical heat flux point which is attained by slowly increasing the input to heater by the dimmerstat. At the critical heat flux point the wire melts indicating the maximum heat flux position.
  • V and I to be recorded at Critical Heat Flux Point (max.)

Range of Experiments:

  • Two successive regions of pool boiling phenomenon namely:
  • • Natural Convection Boiling and.
  • • Nucleate Boiling. Can be visualized up to the critical heat flux point which is attained by slowly increasing the input to heater by the dimmerstat. At the critical heat flux point the wire melts indicating the maximum heat flux position.
  • V and I to be recorded at Critical Heat Flux Point (max.)

Specification

  • Steam generator of suitable capacity.
  • Copper tubes with -
    i) Natural finish.
    ii) Polished surface finish.
  • Temperature Indicator 0 - 200° C with Chromel - Alumel thermocouples.

  • To find out heat transfer co-efficient of drop wise and film wise condensation at various flow rates of water.
  • Visualization

Specification

  • O. D. of heat pipe = 25mm
    Stainless Steel pipe = 25mm
    Copper pipe = 25mm
    Length of the pipes = 350 mm each.
  • Condenser tank size = 150 x 100 x 100 mm capacity about 2 liter of water.
  • Working fluid in heat pipe distilled water.
  • Voltmeter 0 - 200 Volts
  • Ammeter 0 - 5 Amp
  • Dimmerstat 0 - 4 Amp, 0 - 240 Volts.
  • Heater-Nichrome heaters with ceramic beads.
  • Temperature indicator 0-300°C 18 channels with cold junction compensation.
  • Thermocouples - 6 Nos. on each members. Thermometers - 0° -100°C .1 No.

Range of Experiments:

  • Determination of heat transfer coefficient for inner and outer surface of tubes.
  • Study of variation of heat transfer coefficient with the type of flow.

Specification

  • Test Piece :
    Copper Ø25mm X 60L
    M.S. Ø25mm X 60L
    Brass Ø25mm X 60L
  • Copper test cylinder, with a thermocouple at the center.
  • Water bath with electric heater.
  • Dimmer start to control bath temperature.
  • Digital temperature indicator to measure bath and cylinder temperature.
  • A timer with buzzer to note the temperature at regular time interval.
  • The unit provided with an attractive and rust proof powder coating.

Range of Experimentation

Determination of overall heat transfer coefficient for a tube –in – tube type heat transfer. To calculate

Rate of heat transfer

Theoretical overall heat transfer co-efficient.

To compare the performance of Parallel flow & Counter flow heat exchanger.

Specification

  • Voltmeter 0 - 200 Volts, Ammeter 0 - 5 Amp
  • Temperature Indicator 0° - 300°C, Blower - 0.5 HP
  • Mass transfer appears in many practical applications of Chemical & Mechanical Engineering. Some of examples of industrial importance of mass transfer are
  • Humidify of air in a Cooling Tower
  • Evaporation of petrol in the Carburetor of a Petrol Engine.
  • Evaporation of Liquid Ammonia in the atmospheres of Hydrogen in Electrolux Refrigerator.
  • Dispersion of Oxides of Sulphur from a power plate discharge of Neutron in a Nuclear Reactor.

Range of Experiments:

  • Determination of Thermal conductivity of insulating Material in the form of slab.
  • Study of variation of Thermal Conductivity of the material with temperature.
  • Comparison of Thermal conductivities of various insulating Materials.

Specification

  • Heat Exchanger : Plate heat exchanger with 5 nos. of 180mm x 400mm S. S. plates.
  • Geyser to obtain hot water – 3kw capacity.
  • Calibrated water f low measurement tank.
  • Thermometers to measure inlet and outlet temperatures of fluid.
  • Flow control Valves.
  • A technical manual accompanies the unit.
  • Optional Accessories (at extra cost)
  • Rotameter to measure water flow rates instead of measuring tank.
  • Multi - channel digital temperature indicator 0° - 300° C to measure the temperatures instead of thermometers.

Specification

  • G. I. Shell - 50 NB, 1 m long provided with end boxes.
  • Copper Tube – 21 mm I. D., 25 mm O. D. & 1000 mm length.
  • Instantaneous water heater, 3Kw capacity, to supply hot water
  • Temperature indicator for measuring the water temperatures.
  • Valves to control hot and cold water flow.
  • Rota meters to measure the cold & hot water flow rates.
  • Voltmeter & ammeter to know the instant supply conditions.

  • To find out heat transfer co-efficient of drop wise and film wise condensation at various flow rates of water.
  • Visualization
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