Semi Circular Glass Block
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A small scale bench top accessory designed to measure the temperature profile and heat transfer along a horizontal Extended Surface. The resulting heat transfer gives a temperature profile that may be investigated and predicted by conventional analysis. A small diameter uniform rod is heated at one end and heat flowing along the rod by conduction is lost to the surroundings by a combination of natural convection and radiation.
Experimental Capabilities:
Determining the constant of proportionality/thermal conductivity of the rod material.
Calculating the heat transfer from an extended surface resulting from the combined modes of free convection and radiation heat transfer and comparing the result with a theoretical analysis.
Measuring the temperature distribution along an extended surface and comparing the result with a theoretical analysis.
Reduced voltage starting is ideal for applications where full motor torque could tear or damage a product, such as paper or delicate fabric. Learners will study Wye-Delta power distribution, types of voltage circuits, and the operation of an autotransformer reduced voltage starter. Reduced Voltage Starting Learning System adds to the Electric Motor Control Learning System to teach methods of starting electric motors under reduced voltage, 3-phase power distribution using Delta and Wye transformer wiring configurations, and troubleshooting.
This system uses industrial quality components that stand up to frequent use and enables learners to practice with real-world components that they will encounter on the job. The Reduced Voltage Starting Learning System includes a Dual Transformer Station, featuring two control transformers, and a Power Resistor Station, featuring three 25 ohm, 100 watt resistors.
Features:
Heavy-duty components
Multimedia Curriculum Available
Teaches methods of starting electric motors under reduced voltage and 3-phase power distribution
Hands-on skills.
Compact, mobile design
Easily dismantled for inspection and cleaning purposes
Tall Form chamber straight side to diameter ratio of 3:1, conical discharge section
Advanced 2-fluid nozzle atomisation system
Data logging facility for all key operational parameters
Control & measurement of relative humidity
Spark arrester on input and enhanced safety extraction fan
Powder discharges from two points, chamber and cyclone
Low noise levels
Accessory sets are available to quickly change from drying to spray chilling
Individual inlet and exhaust fans with variable speed control.
Supplied with optional nozzle configurations for counter- and co-current atomising.
The following sections of the electric plant of the car are reproduced on the panel:
Fuel injection
Lighting system
Anti-fog lights
Various end users
Indicators
Electrical supply
Head lights
Starting
Ignition
Cooling and aeration
Signalling system
Windshield wipers.
Bench top unit with anodized aluminum structure and panels of painted steel.
Diagram in the front panel with similar distribution to the elements in the real unit.
Main metallic elements of stainless steel.
Computer controlled cooling compressor:
a. Type: hermetic.
b. Power: 1 CV.
2 water condensers, capacity: 1580 W.
2 computer controlled air condensers.
High pressure switch.
Expansion valve.
Coolant accumulator.
Coolant filter to retain particles of condensate.
2 computer controlled air evaporators.
2 water evaporators, capacity: 1580 W.
4 manometers, situated at important points of the process.
13 type J temperature sensors.
Liquid separator to retain liquid particles before being directed to the compressor.
Experimental capabilities:
Determination of equivalent Moment of Inertia of shafts coupled by gears.
Experiment to determine the Moment of Inertia of rotor system mounted on bearings.
Safety glasses and glows
Digital voltmeter
PC interface for the measurement and data storage
Digital ammeter on console
Digital voltmeter on console
Zn reference cell
Copper electrode
Carbon steel electrode
Cu/CuSO4 reference cell
Ag/AgCl reference cell
Transparent basin to build the electrolytic test bath
Simple circuit with sliding variable resistor and lamp suitable for inserting into the electrical circuit of the electrolytic cell
Zinc electrode
Aluminum electrode
Magnesium electrode
DC feeder (with constant voltage, constant current, constant potential facilities)
Ti-Pt anode
MMO tubular anode
Fe bar
Cu bar
Fe-Ni bar
Waterproof resistor with thermostatic device
Resistivity fluid cell
Air pump with relevant sprayer
Carbon steel electrode (partially coated with epoxy compound)
Carbon steel electrode (completely coated with epoxy compound)
Various reagents supplied in plastic cans with safety technical data sheets
Set of ancillaries and connecting leads
Set of spare fuses.
The Computerized Refrigeration Study Unit With Mass Energy Balance is an extremely easy-to-use and functional unit able to permit the study of a compression frigorific cycle and the evaluation of the cycle efficiency and the energy balance at the evaporator and at the condenser. A front panel with mimic diagram and instrumentation allows to keep the most significant thermodynamic quantities under control, so facilitating the students understanding and the teachers task. The unit is supplied with manuals which describe the components, the installation and utilization procedures as well as many exercises with experimental results. Moreover, the transducers and the dedicated software allows the data acquisition of the main thermodynamic quantities and to obtain or as a table or as a graph, the acquired values and the thermodynamic calculated quantities. The unit allow the study of the main thermodynamics quantities as a function of the thermal load at the evaporator and the calculation of the power required at the compressor shaft.
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A suspension strut with a progressive spring has been used. Blowing or discharge of nitrogen into/out of thecompensation container changes the attenuation. In two-wheel vehicles, single-tube shock absorbers arefrequently used.
The following can be shown:
Compression by pressing on the suspension strut
Movement of the cutaway work piston with finned valves forthe pusher and tractor phase
Device to change the spring hardness by turning the steppedsleeve on the bottom of the suspension strut of adjusting nut
In the cutaway compensation container, the cutaway dividingpiston (rubber membrane), in which the gas cushion can be found, can be seen.
Features:
The electrician is adopted a mash plate structure. Suitable subjects: electrician training, electrical training, electrical control technology, electric drive control circuit and skills training, electronic training and related experimental and educational subjects.
It consists of a metal box with handles 200x200 mm by height 400 mm, painted for rust protection. To measure the consistency of fresh concrete.
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Features:
High Strength Steel Roll
Quick release top roller
Asymmetrical Roll Bending Machine
Fixed Top Roller, Adjustable Lower and Rear Roller
Standard Series Wire Core Groove.
During the cardiac relaxation period (diastolic period) the pressure decreases, the density increases and the physical dimension of the tips of the fingers decreases. At every heartbeat the arterial blood pressure raises (systolic period) and the dimension of the tips of the fingers slightly increases, while the higher oxygenation causes the decrease of the optical density of the skin tissue. Since these cyclical variations follow the cardiac rhythm, they can be used to measure the frequency of the peripheral pulsations.
Circuit blocks of Pulse Rate
Effects of the temperature on the measurement of the frequency of the pulsations
Recordings of the peripheral pulsations in a finger
Effects of breathing and exercising on the frequency of the pulsations.
Theoretical topics:
Measurement of the cardiac frequency
The use of optical sensors
Comparator with hysteresis for the processing of the signal provided by the optical sensor
Concept of cardiac rhythm and typical values, in different subjects and in different conditions of the subject.
Flow Control And Regulation Study Unit makes it possible to analyze the behaviour of a control loop where the controlled quantity is the flow rate of a liquid in a circuit. Students can examine the effects of the different control parameters on the performance of the control chain and on the stability of the system; furthermore, they can become familiar with the components commonly adopted in modern industrial applications, as the system is entirely made of industrial quality components. The unit can be had in two versions, where the control element consists of a pneumatic valve or a motorised electric valve. Compared to other quantities such as the level or the temperature the flow rate varies as a function of the regulating signal ina very quick way. This makes the problem of choosing the most suitable control technique very interesting.
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Safety adsorber for closed water circuit
Continuous process
2 adsorbers with activated carbon filling
Water temperature control
Digital temperature indication
Adsorber with 8 sampling points
Metering pump for concentrated adsorbate solution
Change of adsorbate concentration and contact time
Pump for recirculating the treated water
Flow rate adjustable.
Again these all take place with the repeatability advantages that electronic and software control brings. The addition of the process vessel allows more complex process control problems to be addressed, including remote set point demonstrations.
Single loops in combination:
Temperature control of reactor contents by varying heating fluid flow rate
Temperature control of heating fluid by varying heater power
Conductivity control of reactor contents by varying flow rate of one component.
The kit is supplied in plastics box. The kit includes belt and chain power transmission systems. Weights and load hangers are used for determination of mechanical advantage and efficiency. Belt And Chain Set is part of mechanical Engineering Test Series which provides sets for various experiments on Basic Panel (separately supplied) to study or demonstrate specific engineering principles.
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Using this unit photoelastic experiments and practices of transparent test specimens (models) may be performed.
Unit for photoelasticity practices, illustrating the subjects of the Photoelasticity theory, the Elasticity theory, Strength of Materials, and Structure theory.
The different test specimens are subjected to loading by external forces and have poralised light shone through them.
A load application element can apply tensile, bending, compressive, and distributed and punctual loads to the specimen.
It is very suitable for the introduction and study of photoelasticity: optical elements, isochromatic, isoclinic, band order, band factor, edge tensionsing, etc.
The stresses and strains occurring in the test specimen are represented as bright spots or figures of different colours, and we can visualise the distribution of stress.
Experiments:
The pressure profile in convergent/divergent nozzles at various pressure ratios
Investigation of expansion with friction in a parallel passage at high subsonic velocities
The phenomenon of choked flow corresponding to sonic velocity at a nozzle throat
The relationship between pressure ratio and flow for convergent and convergent/divergent Laval nozzles
Boundary layer growth under subsonic and supersonic conditions.
