ASR2023 Oil Return In Refrigeration Systems Teaching Equipment Refrigeration Laboratory Equipment
Learning Objectives / Experiments
– fundamentals of the oil return in refrigeration systems
– effect of the rising pipe diameter on the oil transport
– effect of partial and full load operation on the oil transport
– principle of operation of a double rising pipe
– separate or parallel operation of the compressors
Specification
[1] investigation of the oil return to the compressor in refrigeration circuits with oil soluble in refrigerant
[2] refrigeration circuit with 2 compressors connected in parallel, condenser with 2 fans, evaporator with fan and thermostatic expansion valve
[3] 3 single and 1 double rising pipes from glass in the suction pipe of the refrigeration circuit
[4] rising pipes selectable via valves
[5] Flow rate in the refrigeration circuit adjustable by single or combined operation of the two compressors
[6] fan speed adjustable
[7] thermowells for temperature measurement
[8] refrigerant AR134a, CFC-free
Technical Data
2 compressors with condenser
– refrigeration capacity: 1194W at -10/32°C
– volumetric air flow rate fan: 1300m³/h
Evaporator
– transfer area: 5,7m²
– volumetric air flow rate fan: 720m³/h
Rising pipes
– d=14,4mm; L=1110mm
– d=10mm; L=1110mm
– d=6mm; L=1110mm
– d=8/10mm (double rising pipe);
L approx. 1300mm
Measuring ranges
– pressure: 1x -1…9bar; 1x -1…24bar
– flow rate: 1x 2…27L/h
– temperature: 5x -50…100°C
Dimensions and Weight
LxWxH: 1410x800x1900mm
Weight: approx. 216kg
Required for Operation
230V, 50/60Hz, 1 phase
