Mechmatics Engineering Private Limited

FEATURES:• Box Dimensions: 1500 mm x 600 mm x 1300 mm• Hot Water Geyser: 2 Liters Capacity• Computerized Data Acquisition System to Capture 4 Temp Points and Two Flow rates• A plot, Save and Obtain Direct result on Computer Screen• Flow Control is Manual• Detailed Technical Manual and Schematic Diagrams• Service Requirement: Running Water Supply and 230V AC Power

Apparatus can perform three major experiments in convection theory. Easy to replace heater arrangement and simple control panel make this unit user-friendly and cost effective.
APPARATUS DESCRIPTION
The vertical air duct with a cross-sectional area of 120 x 120 mm2 and a length of 1200 mm is used to guide the airflow over a heated surface. The ambient air enters the duct at the bottom and heated air leaves the duct at the top.

The air duct has several measuring glands that enable one to record the temperature at various locations by using an RTD type thermocouple. In addition, a fan with flow sensor blows air into the duct and measures its volumetric inlet flow rate. Two thermistors recordthe inlet and outlet temperatures of the air flow. Other two temperatures in and above heater plate.

Plate Type Heat Exchanger are highly efficient and commonly used in low temperature applications such as refrigeration and air conditioning.

The apparatus allows heat exchange between hot and cold water in counter flow fashion. Temperature indicators are placed to measure hot water inlet and outlet as well as cold water inlet and outlet temperature. Effectiveness and LMTD values of the heat exchanger can be determined.

Packed bed is a hollow tube, pipe, or other vessel that is filled with a packing material.The packing can be randomly filled with small objects like Raschig rings or else it can be a specifically designed structured packing.

Critical heat flux describes the thermal limit of a phenomenon where a phase change occurs during heating which suddenly decreases the efficiency of heat transfer. The understanding of CHF phenomenon is important for safe and economic design of many heat transfer units including nuclear reactors, fossil fuel boilers, fusion reactors, electronic chips, etc.

The experiment is designed to illustrate the characteristics of the boiling phase change phenomenon. It involves observing the rate of boiling of a saturated liquid on the surface of a submerged hot wire object and measuring the variation of the object temperature with time.

The objective of this experiment is to observe the regimes of nucleate, transition, and film boiling in a pool of saturated liquid, to determine the rate of boiling, and to construct the boiling curve.

Heat and Mass Transfer range comprises of 30+ products for testing in conduction; convection and Radiation. Large variety of Heat exchanger testing rigs are also available.

Petrol Engine Test Rig (Electrical Dynamometer) can conduct various performance test on a Single cylinder 2/4-stroke Petrol Engine to study its Output Power; Volumetric Efficiency; Thermal Efficiency; Heat Balance under various load condition

Load Conditions: Rope Brake Dynamometer or Electrical Dynamometer

Set up is designed to evaluate the Specific Heat of Air at constant pressure.

The Specific Heat of Air Apparatus has a Constant speed fan with variable flow control valve The heater is located at the center of the test section. The forced air flowing through the pipe causes the heat transfer due to convection process. Specific Heat is evaluated by taking the heat balance between heat supplied by heater and heat gained by air.

Knowledge of surface emissivity is important both for accurate non-contact temperature measurement and for heat transfer calculations.

Experimental setup consists of two circular plates identical in size and are provided with heating coils. The plates are kept in an enclosure and heat input can be varied by regulators and is measured by an ammeter and voltmeter. Each plate has thermocouple and one to read the chamber temperature. One plate is blackened by a layer of enamel black paint to form the idealized black surface whereas the other plate is the test plate. The aim is to measure the emissivity of the test plate surface.

Insulating materials reduce heat fluxes. As the thickness of insulating material increases, the thermal resistance increases. However, adding layers of insulation to curved surfaces, such as cylinders and spheres, increases the surface area for convection. This may actually increase the heat transfer.

The apparatus is used to determine critical radius for insulated cylinders by determining heat transfer coefficient and the thermal conductivity of the insulation.

Natural convection is present both in nature and engineering applications. From ocean currents to cooling of molten metals and fluid flows around fins to solar ponds all follows natural convection mechanism

The apparatus is used to determine the overall heat transfer coefficient using natural convection. A Rectangular Duct with open ends has a vertical brass tube with heater fitted at bottom. The Heat Transfers From The Tube To The Surrounding Air By Natural Convection. Temperature sensors Measures values At Different Points Including duct temperature.

Thermal conductivity is the property of a material to conduct heat. Thermal conductivity of liquids plays a significant role in the cooling of electrical equipment's such as transformers.

The apparatus setup consist of two concentric cylinder with thin gap through which liquid or gas can be introduced. Set of temperature sensor measures the heat conduction in fluid medium from which its thermal conductivity can be determined.

Forced convection heat transfer mechanism is found very commonly in everyday life, including central heating, air conditioning, steam turbines and in many other machines.

The forced convection apparatus has a Constant speed fan with variable flow control valve The heater is located at the centre of the test section. The forced air flowing through the pipe causes the heat transfer due to convection process. This temperature difference between up and down stream can be determined using the thermocouples placed along the test section.

In this experiment the friction factor will be measured as a function of Reynolds number for the flow of air/water through a bed of solid particles. Experimental results will be compared with theoretical predictions for the appropriate flow regimes.
The equipment includes two transparent beds, rotameters, manometers, a source of low pressure air, and appropriate valves and fittings.

The rig comprises of a four stroke petrol engine coupled to a rope brake.  A water cooled brake drum along with spring balances, comprises rope brake. With the help of various measurement provided, the test rig can determine BHP, IHP, mechanical & thermal efficiencies, air fuel ratio, specific fuel consumption and heat balance sheet at various loads.

 

SPECIFICATIONS

Engine – Four stroke single cylinder air cooled, vertical petrol engine, developing 2 BHP at 1500 rpm.

Dynamometer - Rope brake: Rope wound around water cooled brake drum and spring balance.

Air intake measurement arrangement.

Fuel intake measurement arrangement.

Multichannel Digital Temperature Indicator to measure the temperatures at various points.

Water circulated exhaust gas calorimeter. 

The whole unit is mounted on a sturdy frame.

 

On-site Training and Detailed Technical Manual. Comprehensive 1-Years Warranty against any manufacturing Defect.

A heat exchanger are widely used in refrigeration, air conditioning, power plants and automobiles.
The apparatus allows heat exchange between hot and cold water in both parallel flow and counter flow fashion. This is made possible with the help of simple valve arrangement. Temperature indicators are placed to measure hot water inlet and outlet as well as cold water inlet and outlet temperature. Effectiveness and LMTD values of the heat exchanger can be determined.

Specification :

• Valve arrangement for Parallel and Counter Flow
• 1 ltr. Measuring Jar
• Stopwatch
• Multi-Channel Temp. Indicator
• Toggle ON/OFF
• 2 Litre Water Geyser

The test rig can conduct various performance test on a Single cylinder 2/4-stroke Diesel engine to study its output power; Volumetric Efficiency; Thermal Efficiency; Heat Balance under various load condition.

Determination of thermal conductivity is important as it is the measure of how quickly heat passes through given material. Insulating powders are widely used in heat insulation applications

The apparatus consists of two thin walled concentric copper spheres. The inner sphere houses the heating coil. The insulating powder is packed between the two shells. The power supply to the heating coil is adjustable. Thermocouples are embedded on the outer surface of the inner sphere and inner of the outer shell.

The most commonly used law of thermal radiation is the Stefan Boltzmann’s Law. The Stefan Boltzman Apparatus is designed to determine the Stefan Boltzmann constant for the given material.

Flanged Hemisphere is fixed in a flat non-conducting plate. Outer surface of the hemisphere is enclosed in water jacket heated separately. Thermocouple measures mean temperature, and the response of temperature with time on a disc fitted at centre is used to calculate the Stefan Boltzmann constant.

Thermal conductivity is the intrinsic property of a material which relates its ability to conduct heat. It's study is important in engineering heat transfer application as materials of high thermal conductivity are widely used in heat sink applications and materials of low thermal conductivity are used as thermal insulation.

This experiment aims at calculating value of thermal conductivity of given Metal rod using a well-engineered experimental setup. A Metal Bar, one end of which is heated while the other end projects inside cooling jacket. The middle potion is surrounded by cylindrical shell filled with insulating powder. Thermocouples are placed on rod, shell and cooling jacket to determine thermal conductivity. Water flow rate is also measured.

SHELL AND TYPE  • Shell Dia. 90 mm• Shell Length: 400 mm• Tube Dia: 6 mm• No. of tubes: 6
• Temp Sensor: 4 Nos
PARALLEL /COUNTER
• Outer Tube Dia 25 mm• Inner Tube Dia: 10 mm• Length: 600 mm• Temp Sensor: 4 Nos
FLOW PLATE TYPE
• PHE Dimension:200 x 80 mm• Plates: 14• Temp Sensor: 4 Nos

OTHER FEATURES:• Box Dimensions: 1500 mm x 600 mm x 1300 mm• Hot Water Geyser: 2 Liters Capacity• Flow Measurement using Rotameter• Control Panel: Multi-Channel Temp. Indicator; ON/OFF Switch; Mains Indicator• Detailed Technical Manual and Schematic Diagrams• Service Requirement: Running Water Supply and 230V AC Power

Composite materials are widely used for purposes associated with transfer of heat. Therefore it is important to determine the rate of heat transfer through different layers of composite wall and develop expressions that model the heat transfer in composites.

The experimental set-up consists of test specimen made of different materials aligned together on both sides of the heater unit. The first test disc is next to a controlled heater. The temperatures at the interface between the heater and the disc is measured by a thermocouple, similarly temperatures at the interface between other discs are measured. The whole set-up is kept in a convection free environment.

Pipe lagging is the process of providing insulation to prevent heat diffusion from pipe. The insulating material is normally wrapped around pipes.

The apparatus is designed to study the lagging phenomenon. Three concentric pipes are arranged between two supports. The gap between the pipes are filled compactly by two different insulating materials and heater is provided at the center of inner pipe. Temperature at various points are measured with thermocouples.

Heat pipe is a heat transfer device which finds its applications in computer system cooling, spacecraft and HVAC systems.

The apparatus aims to determine thermal conductivity of heat pipe and its comparison with other pipes. Heat pipe is made up of SS with partially filled and evacuated distilled water.

The rate of heat transfer can increase by extending the surface area. One of the most common methods is by using fins. A pin fin heat sink has pins that extend from the base and it can be cylindrical, elliptical or square.Apparatus aims at studying heat transfer rate from the fin & the fin effectiveness in natural & forced convection.

Specifications•Pin Fin MOC: Brass•Pin Fin Dia: 12 mm•Duct Length: 150 mm•Centrifugal Blower•Orifice meter and Manometer arrangement to measure the flow rate

Control Panel
•Digital Voltmeter (0-230V)•Digital Ammeter (0-2 Amps)•(Optional Wattmeter: 400W)•Toggle ON/OFF•Blower Speed Regulator

Heater
•400 Watt•Band Type•Dimmer Controller

Thermocouples
•K-type (Cr.Al)•6 Nos.•Multi-Channel Temp. Indicator