Solar Thermal Energy Trainer
....
The mechanical functionality of all components is retained in full. Each of the cutaway models is securely mounted on a base plate to which handles are attached for carrying purposes. The range consists of a series of different cutaway models of drive system components. All components are industrially relevant and have been prepared such that individual active elements are clearly visible to the user. All mechanisms are hand-driven.
....
Comprises of a vertical air duct, with a transparent front for visibility mounted on a fan at the base of the duct, three heat transfer surfaces, airflow, and temperature probes
Technical data is included for each of the three heat transfer surfaces, which will enable students and researchers to compare practical results with theoretical analysis for free and forced convection.
A bench mounted unit specifically designed to demonstrate the phenomena of free and forced convection and to measure temperature profiles from three different heat transfer surfaces.
Three heat transfer surfaces supplied:
Pinned extended surface area 0.0525m2
Finned extended surface area 0.1414m2
A flat plate surface area 0.011m2
All heat transfer surfaces incorporate guards to allow safe use outside of the duct for performing free convection experiments
K-type thermocouples measure the air temperature in the duct before and after the heater as well as the surface temperature of the heat transfer surfaces.
The airflow is manually adjustable up to 10m/s.
Vertical duct incorporates a transparent front wall allowing complete visualisation of the process and identification of the airflow and temperature sensors.
The airflow is measured by an air velocity sensor, which is inserted inside the duct.
A comprehensive instruction manual is included.
Arm Soft software for includes separate exercises for each of the heat transfer surfaces in free or forced convection and records of all measured variables for analysis and comparison of the performances
Each heat transfer surface is fitted with its own heater (240W) and thermocouples, to allow for easy interchange.
The Basic Fluid Power Learning System demonstrates fundamental fluid power principles like pressure and flow by introducing industry-relevant hydraulic and pneumatic skills. Basic Fluid Power Learning System Double Sided A-Frame Bench with One Hydraulic Manifold maximizes training space for teaching industrial pneumatic and hydraulic skills. With this system, you can expand the base hydraulics system to include the intermediate, advanced, or electro-fluid power system. Optionally, you could expand the basic pneumatics system to include the intermediate or advanced pneumatics system or add an additional basic pneumatic system to create a three station training system. The Basic Fluid Power Learning System allows customers to combine up to three additional single panel learning systems with the included set of Basic Hydraulic Learning System panels and Basic Pneumatics Learning System panels. Basic Fluid Power Learning System features standard industrial-grade components and provides learners with real-world experience they would normally only attain on the job. In addition to includes a controls technology workbench, a 2.5 GPM/500 psi hydraulic power unit, student curriculum, a student reference guide, and much more.
Features:
Introduces industry-relevant hydraulic and pneumatic skills while showing how they apply to fundamental fluid power principles.
Offers the opportunity to double your training capacity by adding another set of panels to the opposite side of the A-frame.
Huge array of options for different combinations.
The Test Bench For Electric Machines is a multipurpose bench for the study and characterization of the electrical machines using an automated test approach. The system is composed of the following main sections:
HMI (Human machine interface): the heart of the laboratory. The HMI communicates with the other devices via serial port using the Modbus protocol, reading electrical and mechanical data from instruments and providing the commands to the prime mover, so it can be used as drive, load or a speed and torque control to put the machine under test in a specific working condition or to simulate different load profiles such as fan, lift, etc. It performs the test automation and provides the user interface to execute the experiments.
Instruments: collect mechanical (speed, torque and temperature) as well as electrical data, and can provide control signals to synchronize a generator with the grid.
Prime mover: A squirrel cage three-phase asynchronous machine controlled by an inverter in four quadrant operation providing the mechanical power and torque necessary for the characterization of the machine under study.
The cooling fluid can be water, or a mixture of glycol and water, dependent on the output temperature required. This fluid is cooled by the integral refrigeration system. The contains a reservoir of cooled fluid, which is pumped through the external process to be coole (e.g. heat exchanger system). A high pressure pump is used to pump the fluid through the process. Two versions of the are available. The standard version has a painted mild steel case while the has a stainless steel casing. A bypass valve facility allows the fluid to be recirculated independently of the process conditions.
Condenser:Single air-cooled condenser manufactured from aluminium fins mechanically bonded to refrigeration grade copper tubes. The condenser fan is of a low noise axial type. Fan blades are fully enclosed by a safety grill.
Compressor:Reciprocating hermetically sealed compressor with a refrigerant cooled motor.
Evaporator:Packaged coil type made of copper tubes and aluminium fins.
This dimensional metrology practice kit is designed for practical training in the metalworking trades. The test pieces used are stainless steel shafts with various protrusions including one square section. The kit includes ten shafts, all of which differ to a minor degree in dimensions and each of which is individually marked. The kit offers the advantage of being ready for use immediately; it contains everything required for the exercises. All parts are clearly laid out and well protected on a plastic tray. They were manufactured with the accuracy of CNC parts. The trays are stackable, providing for space-saving storage.
....
A bench top service unit makes it possible to supply the electrical feedings and measurement facilities. The Heat Transfer Study Units has been designed to carry out experiments concerning the basic modes of heat transfer. Thus the student can investigate conduction, convection, radiation and their combined effects, non-steady state and measurement errors.
....
Refrigeration systems with two-stage compression are used for the generation of particularly low temperatures. Therefore, two compressors are connected in series, with each compressor only having a relatively low pressure ratio. At very low temperatures large pressure differences are required between the evaporator and condenser. In a compressor the volumetric efficiency drops significantly at high pressure ratios. In addition, intercooling between the low pressure compressor and the high pressure compressor reduces the outlet temperature of the compressor to harmless values and improves the efficiency of the compression. This makes a more favourable dimensioning of the low pressure stage compressor possible. Due to the large specific volume it requires a larger capacity at lower drive power.
....
Possible demonstrations:
Function ofthe thrust rings
Function ofthe friction plates
Locking
Differentspeeds of axle shafts when cornering.
Solar Teaching Experiment Kit system is a solar photo voltaic power system that can provide a practical teaching, testing and demonstration platform for solar cells, sine wave inverter and controller. To help students understand the principles of solar photo voltaic and learn the engineering application of solar photo voltaic. The work flow will be:
The solar energy is converted to low voltage 12VDC by solar cell module.
Then convert 12VDC into 220VAC for all the load by sine wave inverter.
Then charge the battery through the controller.
Experiments:
Solar cell directly load test
Controller principle experiment
Controller over-discharge protection experiment
Controller overshoot protection experiment
Solar photo voltaic energy conversion experiment
Environmental impact on the photo voltaic conversion experiment.
The system uses an ultrasonic wave sent from an emitter to a receiver while both are pulled through water-filled access tubes embedded in the concrete. The measured arrival time and energy are directly related to concrete quality. The control unit must be connected via USB port standard to a regular notebook computer or Tablet PC (not included) on which, should be installed the software (included) for testing, analysis and real time reporting in 2 D Tomography. The Cross-hole Sonic Logging (CSL) method is used to perform high-resolution quality control on deep foundations.
....
Hand Operated:
Capacity in Tones Throat Day-Light Stroke
5 115 210 75
15 150 225 100
25 200 300 125
40 250 350 140
60 300 400 150
75 325 450 150
100 350 500 150
150 375 550 150
With this board the students can study the operating principle of a control system. In this card the most common adjustments are used such as PID and On Off controls. The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering. In addition to increase the teaching experience it is provided with a digital controller with display, alarm circuits and output stages.
Circuit Blocks:
Analog PID controller
Digital controller with Display
Alarm circuits
Linear amplifier
The expansion valves can be selected via valves. Via an evaporator with glass tubes the correct injection and evaporation of the refrigerant can be monitored. An additional electrically heated superheater at the output of the evaporator enables the investigation of the control behaviour with different refrigerant superheating. In the refrigeration circuit the expansion valves, also called primary controllers, also play an important role. The correct selection and adjustment decisively affects the capacity of the overall refrigeration system. The trainer enables the investigation of four different expansion valves: TEV (Thermostatic Expansion Valve) with internal pressure compensation, TEV with external pressure compensation, TEV with MOP function (Maximum Operating Pressure) and AEV (Automatic Expansion Valve). The control behaviour can be monitored at a flow meter. Pressure and temperature sensors upstream and downstream of the expansion valve and at the evaporator outlet provide information about the state of the refrigerant and the degree of superheating. The locations of the temperature sensor at the evaporator output can be selected.
....
The sectioning procedure has been carefully studied to show the operating principles thus becoming a very important educational aid. Provides the components under sectioned version to visualize the technologies used their construction. You can find the same components fitted on our trainers for the study of pneumologic. Industrial type pneumatic components which are container in a suitable suitcase and are usually utilized in the industrial automation control circuits.
....
Vacuum inside drum to draw off filtrate and dry filter cake
Continuous removal of filter cake with adjustable scraper or compressed air
Continuous cake filtration of suspensions with a drum cell filter
Drum speed infinitely variable
Suspension tank with stirrer and overflow
Plastic collector tank for filter cake
Plastic vacuum tank to collect filtrate
Rotating perforated drum, partially immersed in suspension, with filter cloth.
The mechanism is assembled in an anodized aluminium structure, with painted steel panel.
The bars, made of anodized aluminum, can be connected at different lengths using easy to fit knurled bolts.
The discs include a scale to measure the input and output angles accurately with the aid of a methacrylate indicator. The rotary motion of one of the discs is transferred through the bars and generates the rotary motion of the other disc. It is made of anodized aluminum and consists of two rotary elements (graduated discs) mounted on ball bearings.
Bench-top unit for fatigue strength testing.
Metallic protective covers, one for the motor axis zone, and other for the test specimen zone, with safety protection system to avoid accidents.
Anodized aluminium structure and panels in painted steel.
Safety switch that stops the motor when the metallic protection is removed.
Diagram in the panel with similar distribution to the elements in the real unit.
Motor speed control by a frequency regulator, controlled by the control software (from the computer (PC)).
Electrical motor of 0.37 kW, maximum speed: 1500 rpm.
