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Computerized Cascade Refrigeration Trainer

Product Code : EL-RAACLE-10789

Quick Answer:

The Computerized Cascade Refrigeration Trainer demonstrates a cascade refrigeration system with two-stage compression, used to generate particularly low temperatures where large pressure differences are needed between the evaporator and condenser and a single compressor's volumetric efficiency would drop significantly at high pressure ratios. Two compressors are therefore connected in series, each with a relatively low pressure ratio, allowing more favorable dimensioning of the low-pressure stage compressor, which due to its large specific volume requires a larger capacity at lower drive power. Intercooling between the low-pressure (LP) and high-pressure (HP) compressors reduces the HP compressor outlet temperature to harmless values and improves compression efficiency, while sensors record all relevant measured values and transmit them to software in real time for analysis and log p-h diagram representation, with two flow meters indicating total and intercooling volumetric flow rates.

Overview:

Cascade Refrigeration systems with two-stage compression are used for the generation of particularly low temperatures. At very low temperatures large pressure differences are required between the evaporator and condenser, and in a compressor the volumetric efficiency drops significantly at high-pressure ratios. Therefore, two compressors are connected in series, with each compressor only having a relatively low-pressure ratio; this makes a more favorable dimensioning of the low-pressure stage compressor possible, and due to the large specific volume it requires a larger capacity at lower drive power.

All relevant measured values are recorded by sensors and displayed. In addition, intercooling between the low-pressure compressor (LP) and the high-pressure compressor (HP) reduces the outlet temperature of the HP compressor to harmless values and improves the efficiency of the compression. The simultaneous transmission of the measurements to the software enables analysis and the representation of the process in the log p-h diagram in real time, and additionally, two flow meters indicate the total volumetric flow rate and the volumetric flow rate in the intercooling.

FEATURES:

Design and function of a refrigeration system with two-stage compression and injection intercooling

Effect of the inlet temperature at the HP compressor on the efficiency of the compression

Effect of the additional refrigerant intercooling

Distribution of the compressor pressure ratios

Represent and understand the refrigeration cycle process in the log p-h diagram

With intercooling

Without intercooling

SPECIFICATION:

Low-pressure compressor (LP) :

Displaced volume: 25,93cm3

Power consumption: 550W

Refrigeration capacity: 1744W at -10/32°C

High pressure compressor (HP) :

Displaced volume: 8,86cm3

Power consumption: approx. 275W

Refrigeration capacity: 583W at -10/32°C

Refrigerant :

Filling volume: 1,29kg

CO2-equivalent: 1,8t

Measuring ranges :

Flow rate: 2…29L/h, 4…40L/h

Pressure: 1x -1…15bar, 2x -1…24bar

Temperature: 8x -75…125°C

Power :

0…562W (heater)

0…750W (LP compressor)

0…2250W (HP compressor)

Required for operation :

230V, 50Hz, 1 phase

230V, 60Hz, 1 phase

DIMENSIONS AND WEIGHT:

L x W x H (approx.): 2000 x 800 x 1600 mm

Weight (approx.): 265 kg

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Last Updated: September 2026