Refrigeration System With Two Stage Compression

Refrigeration System With Two Stage Compression

Model: SR2013

Learning Objectives / Experiments

– 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

* with intercooling

* without intercooling

– 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

Specification

[1] refrigeration system with two-stage compression

[2] hermetic low and high pressure compressors

[3] adjustable intercooling via refrigerant injection

[4] heat exchange for additional supercooling of the liquid refrigerant

[5] closed refrigeration chamber contains evaporator with fan and adjustable electric heater as cooling load

[6] digital display for temperatures, drive power of the compressors and cooling load power

[7] software for data acquisition with USB under Windows Vista or Windows 7 with online display of the log p-h diagram

[8] refrigerant R404a, CFC-free

Technical Data

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: aprrox. 375W

– refrigeration capacity: 583W at -10/32°C

Measuring ranges

– flow rate: 1x 2…29L/h, 1x 4…40L/h

– pressure: 1x -1…15bar, 2x -1…24bar

– temperature: 8x -75…125°C

– power: 0…562W, 0…750W, 0…2250W

Dimensions and Weight

LxWxH: 1900x790x1900mm

Weight: approx. 283kg

Required for Operation

230V, 50/60Hz, 1 phase