Laboratory Upright Ultra-Low Freezer
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Laminar And Viscous Flow Heat Transfer Unit is allowed to take place between oil and water in a concentric tube. The oil is raised to a maximum temperature of 90°C in a tank fitted with an electric heating element. Control is by a panel mounted digital PID controller and the maximum temperature is limited by a separate thermostat for operator safety. Oil flowing in the inner tube is supplied by an international oil company and has a kinematic viscosity at 70°C, of 8x10-6 m2 s-1. As it flows downwards, the oil is cooled as heat is transferred to the flow of cooling water which surrounds the core tube. The heated oil is pumped from the tank into the core tube of the diagonally mounted concentric tube heat exchanger.
Experimental Capabilities:
Determination of surface heat transfer coefficients on both the oil and water sides and of the overall heat transfer coefficient.
Demonstration of a simple concentric tube heat exchanger with con-current and counter-current flow.
Simple energy balance for a heat exchanger.
This trainer has a modular structure and it consists of panels installed on a vertical frame. It is supplied with atheoretical and practical manual. Industrial type components are educationally adapted by using a modular panelsystem to permit the step by step assembling from the simplest circuit to themost complex system. This laboratory is designed for the study of Flow control application to allow thestudent a practical training, based on the performance of guided experiments. The modularity of this system cangive the students a direct and immediate approach to the topics, offering theopportunity to study various subjects, performing several experiments asfollowing:
Analysis of flow control features
Measurement systems features.
The pressures, temperatures and air flow rate are recorded by a combination of instrumentation on the Compressible Flow Range base unit and the optional module. A digital hand held manometer is supplied.
A series of four straight tubes of different diameters with end pressure tapings allow pressure losses in a straight pipe to be investigated at a range of Reynolds numbers. Bends, sudden enlargements and contractions are included to allow investigation of pressure loss and recovery.
The unit is driven by an ejector (jet pump) allowing investigation of entertainment ratio and ejector performance.
Features:
Dynamic display of load, displacement, deformation and real-time testing curve on the screen.
Closed loop control of channels such as load, displacement, deformation, etc. Smooth switching in between.
Event data can be saved, test can continue to be interrupted when the power supply test.
The machine Supports more than 20 days of continuous testing.
Four specimen can be tensile test at one time.
Domestically pioneered process-oriented design of testing control. Provides users with intuitive testing control procedures and a wide range of instruction types. Also supports dynamic instruction parameter assignment.
Domestically pioneered open-testing-method settings. Engineers may set up testing projects then operators may employ the projects for testing, greatly reduced the difficulty of the operations and the requirement in the skills and trainings of the operator.
Automatic requesting for testing result data, also capable of launching an advanced analysis to inspect the data.
Domestically pioneered highly efficient three-level operation model of testing data processing. Supports open testing data processing, appending custom testing data items and re-inspection of processed testing data.
Capable of statistical operations on testing data (average, standard deviation, coefficient of variance).
Characteristic testing data can be marked on testing graphs.
Mini Axial Flow Propeller Turbine is to be used with a submersible pump and Hydraulics Bench. The turbine fixed guide vanes direct water to the runner. Mini Axial Flow Propeller Turbine equipment demonstrates axial flow propeller turbine characteristics power and efficiency at different speeds for various heads and flow rates of water. Flow rate is measured by the Hydraulics Bench measuring tank. The apparatus has a hose for connection to the Hydraulics Bench. Inlet pressure is indicated by a manometer. Torque is measured by a prony brake with two spring balances. Speed is indicated on a portable tachometer.
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The unit is supplied with manuals that describe each component of the system, installation and utilization procedures. The Hydrogen Bubble Flow Visualisation System is a bench top apparatus allowing thestudents to observe the flow patterns associated with water streams in presence of obstacles. A low voltage light source makes it possible the flow visualization studies. Small hydrogen bubbles are generated by an interchangeable platinum wire cathode and following the water stream show its direction and its behaviour in presence of objects.
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Fuel recirculated from the engine, together with the excess from the pressure regulator is returned to the delivery pump suction via a water cooled heat exchanger. In the outlet or demand circuit fuel is drawn from the measurement section and pumped at controlled pressure to the engine under test. The system comprises of two main items, a fuel handling module and a display unit. The reducing valve ensures that the flow metering section remains under pressure, thus minimising the problems of vapour release/separation.
Features:
Continuous Flow Measurement
Analogue output proportional to flow rate
Digital display of flow rate
Designed for high fuel recirculating rate
Pelton wheel design transducer
Suitable for both diesel and gasoline fuels.
Totaliser with reset facility
Pressure controlled fuel delivery.
Capacity: 214L
Cabinet Type: Upright
Volume Category: ≥ 80 <300L
Power requirement: 230V /50Hz and upon request 220V/60 Hz
Storage temperature: up to-86°C
Operating ambient temperature: +10 °C to +43°C (Hot zone)
Adjustable cabinet temperature set point -40°C to -86°C in 0.5°C increment., the temperature regulation accuracy is 0.1°C.
Ultra-low Temperature Freezer
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Laboratory Upright Refrigerator, Low Temperature Range
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Water And Water Turbulent Flow Heat Transfer Unit heat exchanger may be connected to give either con-current or counter-current flow and the two additional pairs of intermediate stream temperatures allow classic heat exchanger temperature profiles to be plotted. The Water And Water Turbulent Flow Heat Transfer Unit includes all the necessary temperature and flow measurements and is suitable for both basic and advance studies. The metal and two fluid stream temperature are measured at inlet and outlet allowing the relationship Nu = k ReaPrb to be developed by evaluating k, a and b. The Water And Water Turbulent Flow Heat Transfer Unit enables students to study the detailed performance of concentric tube heat exchangers of the type most commonly used in industry. By varying the water velocity and temperature Reynolds Numbers of 4000 to 70000 and Prandtl Numbers of 2.5 to 5 can be achieved.
Experimental Capabilities:
Determination of surface heat transfer coefficient inside and outside the tube, and of the effect of fluid velocity.
Determination of heat transfer rate, logarithmic mean temperature difference, overall heat transfer coefficient and 4 point hot and cold stream temperature profiles.
Determination of the constants in Nu = k Rea Prb.
Comparison of performance in concurrent and in counter-current flow.
Investigation of the relationship between Nusselt (Nu), Reynolds (Re) and Prandtl (Pr) Numbers for Reynolds Numbers up to 65000 and for Prandtl Numbers between 2.5 and 5.0.
This Trainer includes see-through operating vessels and selected piping. One vessel has discrete level control, the other analog. The Tank Level Flow Trainer with PLC is a combination of working vessels and pumps, with interconnecting piping that is controlled by a Programmable Logic Controller (PLC).
Function of Tank Level Flow Trainer with PLC
Tank Level Flow Trainer with PLC process trainer pumps water from a storage tank into the first working tank which is fitted with level switches. The second tank has an inner air tank which can be selected to change the response characteristics of the process. Note that with this trainer are a number of student modules for instrumentation training in addition to operator training modules. Two parallel pumps, controlled by the PLC, transfer fluid from the first tank to the second where level is measured by analog instruments. Return flow from the second tank to the storage tank is by gravity and the discharge valve is controlled by the PLC.
The system uses a high-pressure piston-recirculation pump to circulate product through the filter module of choice. The speed of the recirculation pump can be adjusted to suit the particular filtration module and the product. The triple-piston design combined with high-pressure flexibles minimises pressure pulsation. The operator can use their own feed vessel or this can be specified. Accidental system over-pressure is avoided by a bursting disc downstream of the recirculation pump. The retentate back-pressure valve enables pressures up to 50 bar to be achieved.
Features:
Variable retentate flow rate in order to change filtration cross-flow velocity
Retentate electronic flowmeter measurement
Retentate and permeate back pressure valves
Capable of microfiltration, ultrafiltration, nanofiltration and revese osmosis operations
Maximum filtration pressure of 50 bar
Clean-in-place capability
Backpulsing option (suitable for certain modules)
Mass balance option for permeate flow rate measurement
All parameters are data logged
Pressure sensors on the retentate inlet and outlet of the filtration module and on the permeate line.
The workstation is constructed of heavy-duty, welded steel. Industrial quality components are mounted and plumbed in a closed loop circuit to control the water flow between two tanks or the liquid level in one tank. The Level And Flow Process Control Learning System teaches two of the most common types of process control systems, flow and liquid level, and the basic concepts on which other systems are based. All components are connected to banana jacks on the control panel to allow students to measure signals and connect the devices in a wide variety of control configurations. Students will learn to calibrate, adjust, install, operate, and connect process control systems in industrial applications. The process control simulator includes a bench-top workstation, process control network, control panel, student learning materials for both theory and lab, and teachers guide.
This allows students to study a wide range of process control methods. The relay control includes manual input switches, control relays, solenoid valves, and float switches to perform automatic on/off liquid level control. Level And Flow Process Control Learning System offers 3 types of controllers: relay control, the standard, and two options: PID controller and PLC control. Manual valves are used to switch between the PID and on/off control methods. The PID controller option enables variable electronic control of either liquid level or flow and the PLC controller option enables both on/off and PID control of the system.
Features:
Interchangeable Components
Built-In Instrumentation
Industrial Standard Components
Student Reference Guide
Heavy Duty Welded Steel Workstation
Industrial Safety Devices
3 Types of Controller Options
PLC Interface
Multimedia Curriculum Available.
Capacity: 598L
Cabinet Type: Upright
Volume Category: ≥ 300 <600L
Power requirement: 230V /50Hz and upon request 220V/60 Hz
Operating ambient temperature: +10 °C to +43°C (Hot zone)
Storage temperature: up to-86°C
Adjustable cabinet temperature set point -40°C to -86°C in 0.5°C increment., the temperature regulation accuracy is 0.1°C.
The nozzle flow meter or any of the optional flow meters quickly andeasily fit into place between the adaptors in the base unit of the apparatus. For use by all kinds of engineering students, the Flow Meter Calibration apparatus compares and shows the accuracy and use of fundamental flowmeters. The manometers have a common manifoldfitted with an air valve. Students use the hand-pump to increase the air pressurein the manifold. The straight pipe gives a comparison of the true pressurelosses caused by the flow meters. Four water filled manometers show the pressure differences at the flow meterand across the overall flow meter assembly. This helps to explain the boundary layerand surface friction in pipes and flow channels. The optional Pitot Tube Flow Meter will alsoshow the velocity profile in a pipe.
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Suitable for both laboratory and field applications battery powered (rechargeble) and fully portable Measurements are indicated on the digital and may be connected to a data logger for later analysis. Propeller Velocity Flowmeter Measurement of velocities in clean conductive fluids within the range 25 to 1500mm/sec (up to 3000mm/sec with high speed probe) Operation in confined spaces with limited intrusive effects.
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The Smart Flow Transmitter Learning System includes an industrial quality transmitter and student learning materials for theory and lab. The transmitter mounts to the workstation console and connects to 3 optional flow transducers: pitot tube, venturi, and orifice plate. The Smart Flow Transmitter Learning System adds to Process Control Learning System to provide a 4-20 mA feedback signal that is proportional to the flow rate measured by transducers that sense differential pressure.
Features:
Industrial-quality component
Student Reference Guide
Senses the differential pressure within the system.
