Heat Transfer Lab

The unit demonstrates the thermal conductivity at various heat inputs and different configurations. The apparatus consists of a heater sandwiched between two identical composite slabs. Water-cooled heat sinks, to steady state heat transfer condition achieved earlier. Provides MS, Al. and Bakelite plates and necessary meters on control panel.

The unit explains the Thermal conductivity and characteristics of lagging material, using three concentric pipes and a heater and two types of lagging materials are filled up. Thermocouples and dimmer state measures various temperatures and heat inputs

The unit demonstrates super conductivity of heat pipe as compared to copper pipe as good conductor of heat and to stainless steel pipe as same material of construction. The unit provides Heat pipe, copper pipe & stainless steel pipe. All the pipes are heated at one end & water tank at other end. To find out isothermal operation of heat pipe as compared to other conductors by using thermocouples.

The unit provides find out critical radius of insulation, ratio of thermal conductivity and outside heat transfer co-efficient. The unit consists of four G. I. pipes provided with plaster of Paris insulation on out side surface and heater inside, having separate input control. Input to heaters is measured by common voltmeter& ammeter.

The unit is example of an unsteady state problem of interest is the heat transfer of a solid body being quenched in a fluid, the apparatus consist of a small cylinder, heated by a hot bath till steady state reaches then quenched in air or water bath. So, temp of cylinder is a function of time, heating and cooling of cylinder is unsteady

The Unit 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, Aluminum and M.S. Control panel with voltmeter, Ammeter T. indicator, Airflow duct with blower

The Unit is 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 that is voltmeter, Ammeter , T. Indicator.

The Unit is to calculate local and over all heat transfer coefficient in forced convection at various airflow 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. Control panel with necessary measuring instruments that is voltmeter, Ammeter , T. Indicator.

The Unit is 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. The test section is well insulated to minimize the heat losses.

The unit consists a test plate and a black plate, as a comparator, all the physical properties, dimensions, & temperatures 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 Stefan Boltzmann 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

To unit Drop and film forms consists of heat transfer coefficients in dropwise & filmwise condensation, glass cylinder at the top of which two condensers hang and steam inlet at bottom, water is circulated through the condensers from common inlet.Transparent glass cylinder allows visualization of condensation process. Rotameter for water flow, Pressure gauge for steam pressure, temp. Indicator for various temperatures. Control panel with necessary measuring instruments that is voltmeter, Ammeter, T. Indicator

The unit is to study visualization of two phase of liquid viz. boiling & condensation. Liquid R-11 in which a hot cylinder is immersed. Boiling of liquid, observed over heater surface upto nucleate boiling phase. Condenser coil at the top of cylinder. Vapor is condensed to liquid. Measurements- pressure of vapor-pressure gauge, water flow Rotameter, Control of heater surface temp. Dimmer & Liquid temp. -Thermometers. Control panel with necessary measuring instruments that is voltmeter, Ammeter, T. Indicator

The unit is to study the boiling heat transfer. A nichrome wire immersed in water and heated by passing current through it. input to nichrome wire, controlled by dimmer stat. Increasing wire input current increases & at critical heat flux the wire brakes. It is measured on meter. Magnifying glass and lamp to visualise natural connection and pool boiling and separate heater coil in water allows for various water temperature

To unit is to determine the heat transfer rate, LMTD, heat transfer coefficient and effectiveness of heat exchanger. Unit consists of a copper tube inside a G I pipe, hot water from geyser flows through the inner tube and cold water flows through outer tubes. Hot water flows in one direction, cold water can be changed parallel or counter. temperature and flow rate of water measured

The unit is to determine of heat exchanger, heat transfer coefficient, LMTD and effectiveness of the exchanger. Unit consists of a G I pipe, copper pipe with longitudinal fins over the periphery is fitted inside. Hot fluid is water obtained from geyser. Flows through the copper pipe. Cold fluid is air. flows over the fins. Direction of hot water is fixed, direction of air can be changed. Various measurement are provided

The unit is to compare the performance of finned tube with plain tube heat exchanger. Two heat exchangers operating in parallel are concentric tube type. Inner tube carries hot fluid and cold fluid flows outside. Hot fluid is water and obtained from heaters. Cold fluid is air supplied by blower to both exchangers. One exchanger with plain inner tube & other with finned tube

The unit determine LMTD , heat transfer rate and effectiveness of heat exchanger.cross flow heat exchanger is air to air type. air flow supplied by blower. Hot air obtained passing air over a bank of finned tubes. Hot air flows through tubes while cold air flows over the tubes at right angle to hot air

The unit is to determine heat transfer rate, heat transfer coefficient, LMTD. The unit consist a two design, mild steel shell houses the copper pipes. End box for shell which carriers a baffle at the center to make the heat exchanger of two pass type. cold fluid passes out side the tubes in the shell. Hot water flows inside the tubes. Temp. of hot water & cold fluid measured by thermometer. Flow rates and temp. Of hot and cold fluid can measure.

The unit is to determine Heat transfer rate, heat transfer coefficient, LMTD & effectiveness of heat exchanger in laminar as well as turbulent flow of air. A m..s. shell,in which copper tubes are fitted, baffle in the end box make the tube arrangement two pass type. Cold fluid is air enters the shell and flows over the tube. Hot fluid is water obtained from geyser & flows through the tubes. 25% cut baffles are provided in the path of air. Measuring tank for water flow rate, Orifice with water manometer for airflow, thermometer for inlet and out let temperature.

The unit is to determine heat transfer rate, LMTD, heat transfer coefficients and effectiveness of heat exchanger. The unit consists cold and hot fluid obtained from geyser. Inlet and outlet connections are positioned to make the Exchanger counter flow type. Hot and cold fluid pass between alternate plates

The unit consists of two columns filled with steel balls. Two blowers are provided for hot and cold air. The columns are filled with steel balls one column is getting heated by hot air while other by cold air. Thus alternately columns are heated and cooled and operation is continuous.

The unit is to determine thermal conductivity of metal bar. A copper bar, heated at one end, heat sink at other end, teat section of bar is properly insulated & thermocouples are attached for temperature. Heat conducted through the section of bar is measured by heat collection in water-cooled heat sink. Panel with necessary measuring instruments that is voltmeter, Ammeter, T. Indicator.

The unit is to determine thermal conductivity of insulating powder by sphere in sphere method. A copper sphere in which a mica heater is fixed. the sphere is surrounded by another bigger copper sphere and between the two sphere the test insulating powder is filled. Heat of the heater radically flows outwards in all directions through powder. Temp. Across the powder are measured. Panel with necessary measuring instruments that is voltmeter, Ammeter , T. Indicator.

The unit is to study Thermal conductivity of Liquid, an electrical heater sandwiched between aluminum plates. Heat loss from hot plate is prevented by using two guard heaters and heat of hot plate is made to flow through specimen. cold plate on opposite face of liquid removes heat from liquid by circulation of water. Input to heaters can varied & measured. Digital temp Indicator to measure temperature. Panel with necessary measuring instruments that is voltmeter, Ammeter , T. Indicator.

The unit is to determine thermal conductivity of specimen, main heater and radial heater sandwiched between copper plates. Specimen in the form of slabs of equal thickness are placed on either sides of heaters and cooling plates. other side of specimen water is circulated. Radial guard heaters ensures all heat of main heater passes axially through the specimen, collected by cooling plates. By knowing the themp. And heat input, thermal conductivity of specimen can be calculated. Panel with necessary measuring instruments that is voltmeter, Ammeter, T. Indicator.