SR2023 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 R134a, 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