Vapour Jet Refrigeration Trainer
Product Code : EL-RAACLE-10796
Quick Answer:
The Vapour Jet Refrigeration Trainer demonstrates a vapour jet (ejector) refrigeration system built around two linked refrigerant circuits: a refrigeration cycle that produces the cooling effect and a vapour cycle that generates the motive vapour driving the vapour jet compressor. Refrigerant is compressed, condensed in a transparent water-cooled condenser, expanded through a flooded evaporator with float-valve level control, and re-compressed, while a separate electrically heated vapour generator supplies motive vapour to power the compressor. All key temperatures, pressures, heater power, and cooling water flow are measured, displayed, and adjustable on the unit.
Overview:
The trainer includes two refrigerant circuits: a refrigeration cycle used for cold production and a vapour cycle used to generate the motive vapour that drives the system. The vapour jet compressor compresses refrigerant vapour and transports it to the condenser, a transparent tank fitted with a water-cooled pipe coil. In the refrigeration cycle, some of the condensed refrigerant flows into the evaporator, which is connected to the intake side of the vapour jet compressor. The evaporator is a flooded evaporator in which a float valve keeps the liquid level constant; here the refrigerant absorbs ambient heat or heat from the heater and evaporates. The resulting refrigerant vapour is then aspirated by the vapour jet compressor and compressed again.
In the vapour cycle, a pump transports the remaining part of the condensate into a vapour generator, where an electrically heated tank with a water jacket evaporates the refrigerant; the vapour this produces drives the vapour jet compressor. All relevant measured values, such as temperatures and pressures, are measured and displayed on the experimental unit. The heater power at the evaporator is adjustable, and the cooling water flow rate at the condenser is set using a valve.
In the vapour cycle, a pump transports the remaining part of the condensate into a vapour generator, where an electrically heated tank with a water jacket evaporates the refrigerant; the vapour this produces drives the vapour jet compressor. All relevant measured values, such as temperatures and pressures, are measured and displayed on the experimental unit. The heater power at the evaporator is adjustable, and the cooling water flow rate at the condenser is set using a valve.
FEATURES:
Clockwise and anticlockwise Rankine cycle- energy balances- calculation of the coefficient of performance of the refrigeration circuit.
Thermodynamic cycle in the log p-h diagram – operating behavior under load.
Understanding compression refrigeration systems based on the vapour jet method.
SPECIFICATION:
Vapour jet compressor :
dmin convergent-divergent nozzle: approx. 1,7mm
dmin mixing jet: approx. 7mm
Condenser :
Tank: approx. 3,5L
Pipe coil area: approx. 0,17m2
Evaporator :
Tank: approx. 3,5L
Heater power: 4x 125W
Vapour generator :
Refrigerant tank: approx. 0,75L
Water jacket: approx. 9L
Heater power: 2kW
Pump :
Max. Flow rate: approx. 1,7L/min
Max. Head: approx. 70mWS
Measuring ranges :
Current: 0…2,5A
Voltage: 0…230VAC
Temperature: 10x -20…200°C
Pressure: 2x 0…10bar / 2x -1…1,5bar
Flow rate (cooling water): 6…75g/s
Required for operation :
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase
DIMENSIONS AND WEIGHT:
L x W x H (approx.): 1300 x 600 x 1200 mm
Weight (approx.): 160 kg
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Last Updated: September 2026
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