Heater with controller to adjust the tank temperature
Record of all relevant measured values and display directly at the location of measurement
Investigation of a refrigeration circuit with water circuit as load
Water circuit with pump, tank with heater as cooling load at the evaporator
Refrigeration circuit with compressor, condenser with fan, thermostatic expansion valve and coaxial coil heat exchanger as evaporator.
Commercial components are used in practical experiments. These components are mounted on plates ready to be connected and are arranged clearly in the frame. This allows for the defrosting of an iced-up evaporator by operating it temporarily as condenser. Manometers provide an insight to the pressure ratios in the refrigeration circuit. The set includes complex refrigeration components, such as capacity controller, start-up controller, defrost timer, 4/2-way reversing valve and refrigeration controller. The 4/2-way reversing valve, for example, is used to reverse the circuit.
....
The super Heater included in the set is a heat exchanger ensuring the complete evaporation of the refrigerant before entering the compressor whilst the liquid refrigerant is supercooled upstream of the expansion element. The set includes simple refrigeration components, such as expansion elements and filters, as well as electrical components, e.g. switches and thermostat. Via pressure and temperature measurements the change of state of the refrigerant can be tracked and entered. The temperature is measured by interlaboratory thermometers. The control behaviour of the expansion element is monitored at the flow meter. Manometers provide an insight to the pressure ratios in the refrigeration circuit.
....
Components for the setup of simple refrigeration circuits in conjunction
Pressure-controlled expansion valve
Thermostatic expansion valve
2 thermostats with different temperature ranges
Heat exchanger as super heater
3-pin circuit breaker
Sight glass with humidity indicator
Components mounted on plates ready to connect
Abrasion-proof symbols and labels on plates
Assembly aid: 4-port directional valve with sight glass.
A bench mounted vapour compression Refrigeration Cycle Demonstration Unit using a hermetic compressor and water cooled flooded glass condenser and evaporator. Internal electrical and mechanical safety devices allow for unsupervised operation by students. Standard instrumentation fitted enables measurement of the condenser and evaporator pressures and temperatures as well as water flow rates and water temperatures. A float controlled expansion device controls the flow of refrigerant in the system. Refrigeration Cycle Demonstration Unit operates on low-pressure non-toxic ozone friendly refrigerant.
Experimental Capabilities:
Investigation and demonstration of the pressure-temperature relationship during evaporation and condensation.
Demonstration of the vapour compression refrigeration and heat pump cycle with visual observation of all-important processes.
Demonstration of: -
Determination of effect of evaporating and condensing temperatures on the refrigeration rate and condenser heat output.
Determination of overall heat transfer coefficient in a simple shell and tube type heat exchanger.
Investigation of the effect of compressor pressure ratio on system performance.
Charging
Pumping over or pumping down the refrigerant charge into the condenser.
The effect of air in refrigeration systems.
Refrigeration Laboratory Unit is a fully instrumented refrigerant vapour compression refrigerator with belt driven compressor, electrically heated evaporator, thermostatic expansion valve and water cooled condenser. Refrigeration Laboratory Unit Instrumentation includes all relevant temperatures, condenser pressure, evaporator pressure, refrigerant and cooling water flow rates, evaporator and motor power, motor torque and compressor speed. Operating parameters can be varied by adjustment of condenser cooling water flow and electrically heated evaporator supply voltage. Components have a low thermal mass resulting in immediate response to control variations and rapid stabilisation.
Experimental Capabilities:
Investigation of the variation in refrigerator duty or cooling ability for various condensing temperatures.
Investigation of the variation in refrigeration Coefficient of Performance for the various condensing temperatures.
Production of a vapour compression cycle diagram under various conditions.
Production of an energy balance for the refrigerator.
Investigation of the performance of the thermostatic expansion valve.
Investigation of the heat delivered to the cooling water with variation in condensing temperature.
Investigation of the variation in Coefficient of Performance based on electrical, shaft and indicated power.
Determination of the overall heat transfer coefficient for the condenser cooling coil.
Investigation of power input based on electrical, shaft and indicated power.
Investigation of the Coefficient of Performance as a Heat Pump for various condensing temperatures.
Compact laboratory designed for training of 14 years students and over. The trolley is completely mobile and has 5 storage drawers, protecting the equipment in shock-free, molded sponge pods. You can organize the equipment according to the subjects for quick and easy setup and control of the equipment itself. It is particularly suitable to introduce the main and practical refrigeration applications in both vocational and technical schools. It is possible to compose the circuit on the aluminum surface to place on the working top. Opportunity of fault insertion and detection. It is ideal for all teaching environments and its modular design guarantees both flexibility and adaptability for all the experiments. The Refrigeration Mobile Lab is already equipped with all the necessary feed fittings according to the industrial standards.
....
The 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. 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.
....
Open Compressor
Condenser with fan transfer area: 2,5m
Capacity: approx. 1935W at 25C air temperature (ambient) / t=15C
Refrigeration capacity: approx. 845w (at speed: 975min-1 and -10/40c)
Speed: 500...1000min-1
Heat exchanger for refrigerant super cooling
Individual or parallel operation of the chambers via solenoid valves
Simulation of 18 faults
Investigation of a refrigeration system with refrigeration and freezing chambers
Insulated freezing chamber with fan and electric defrost heater
Refrigeration circuit with compressor, condenser and 2 evaporators with thermostatic expansion valve and evaporation pressure controller
Insulated refrigeration chamber with evaporation pressure controller.
The test rig comprises of a refrigerating chamber with forced draught evaporator fed by a thermostatic expansion valve, a condensation unit of 250 W; transparent access panel; refrigeration circuit with flow display screen equipped with heat exchanger for subcooling the liquid and the solenoid valve; electric defrost system and control through programmable PLC and timing. Our equipment allows students to visualize and study the process of industrial refrigeration. Despite being a bench top unit, it includes all the essential components of a large scale installation. The unit has been built using modular systems and it can reach a cooling temperature of -30ºC. It includes a drying filter and a liquid storage tank.
Experimental Capability:
Heat transfer and thermal insulation
Coolants
Calculation of thermal loads
Refrigerating chambers and industrial refrigeration
Automatic control and instrumentation
Psychrometric processes (low temperature)
Refrigerator cycles
Steam compression
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.
....
Instruments are provided for measurement of temperatures, pressures and cooling water flow rates. The Refrigeration Trainer system requires outside water supply. A table top Refrigeration Trainer system is used to investigate energy balance at compressor, condenser and evaporator. Both the condenser and evaporator used water cooled heat exchangers.
Experiments:
Overall heat transfer coefficients for evaporator and condenser.
Familiarization with refrigeration cycle and components.
Effects of load variation.
Energy balances at evaporator and condenser.
Refrigeration Training System, Refrigeration Training System Equipments, Refrigeration Training System Tools, Refrigeration Training System Tool Kits, Refrigeration Training System Manufacturers, Refrigeration Training System Suppliers from India, China, Kenya
Lab Tender Suppliers Africa and Lab Equipment Africa Kenya, Tunisia, Uganda, Sudan, Algeria, Morocco, Angola, Ghana, Gabon, Lesotho, Zambia, Chad, Somalia, Senegal, Zimbabwe, Guinea, Rwanda, Benin, Burundi, Guinea Bissau, Equatorial Guinea, Mauritius, Eswatini, Djibouti, Reunion, Comoros, Cape Verde, Western Sahara, Tanzania, Togo, Sierra Leone, Libya, Congo, Central African Republic, Liberia, Mozambique, Madagascar, South Africa, Ivory Coast, Cameroon, Niger, Burkina Faso, Mayotte, Sao Tome, Seychelles, South Sudan, Mali, Malawi, Nigeria, Ethiopia, Egypt, DR Congo, Mauritania, Eritrea, Gambia, Botswana, Namibia
....
The refrigerant flow can be modified via shut-off valves. Togetherwith the components from heat exchanger, flow meter or manometer, simplerefrigeration circuits are realised. For continued experiments additionalrefrigeration components from advanced experiments are used post-injectionvalve, capacity controller or defrost timer. This training system practical experiments relating to the operation of arefrigeration system can be implemented by dealing with differently configuredcompression refrigeration circuits. The components used are common inrefrigeration and therefore closely related to practice. All components of the trainingsystem have ball valves at the connections. Using the required accessory kit thecomponents are connected into a complete refrigeration system. The base unit Refrigeration Training System includes the main components of a refrigeration circuit: acondensing unit with compressor, condenser and receiver and a refrigerationchamber with integrated evaporator, fan for forced ventilation and an electricdefrost heater. The refrigerant R513A serves as working medium. A pressure switch protects the compressor against excessivepressure. For the completeexperimental setup laboratory workplace with frame for mounting the componentsand power supply, is required.
Features:
Clear arrangement of components
Setup of the most varied refrigerationcircuits using modular component kits.
Extension with components from advanced experiments in refrigeration systems
Condensing unit, consisting of hermetic compressor, condenser, receiver, pressure switches and shut-off valves
Refrigeration chamber, condensing unit and power supply equipped with shock-proof lab jacks
Base unit for the refrigeration training system
Extension with components from basic experiments using simple refrigeration circuits
Insulated refrigeration chamber with integrated evaporator, electric defrost heater and condensate drip tray.
The fault switches are hidden beneath a panel on the door of the control cubicle so they are not visible whilst the particular fault is being diagnosed. This allows the unit to be demonstrated in the classroom, which in the real world may not be possible. The cubicle is fitted with examples of the typical devices one may come across in the field, such as high and low pressure switches and a thermostat. The allows the lecturer to introduce 12 faults into a control circuit, which has been wired by the student. The Unit has a mimic diagram on the front panel, which simulates an actual compressor control circuit.
....
-lab-1144315275.jpg "Refrigerator (1 door, 92 L, R600a)")
Refrigerator (1 door, 92 L, R600a)
....
Refrigerator Repair And Training Equipment Direct Cooling can be used to train students to master the theoretical knowledge and practice skills of direct cooled refrigerator system.
The control panel wiring connection diagram panel with test points in the circuit diagram, it is easy for students to measure and debugging.
Structure And Compositions:
Mobile aluminum profile frame with control panel:
Control panel wiring connection diagram panel,
Refrigerators refrigeration schematics panel,
Fault setting panel.
