Changes Of State In The Refrigeration Circuit

Changes Of State In The Refrigeration Circuit

Model: SR2003

Learning Objectives / Experiments

– design and operation of a compression refrigeration system

– observe the evaporation and condensation of the refrigerant

– represent and understand the refrigeration cycle in the log p-h diagram

– energy balances

– calculation of the coefficient of performance

– oil return in a flooded evaporator

Specification

[1] demonstration of the processes in a refrigeration circuit

[2] for better process monitoring the evaporator and condenser are of transparent design

[3] evaporator and condenser with pipe coil

[4] expansion valve in the shape of a float valve

[5] pressure switch to protect the compressor

[6] temperature sensor, power meter, manometer in the refrigeration circuit, flow meter for hot and cold water and refrigerant

[7] safety valves at the evaporator and condenser

[8] refrigerant Solkatherm , CFC-free

Technical Data

Hermetic piston compressor

– capacity: 18,3cm³

Evaporator volume: approx. 2,8L

Condenser volume: approx. 2,8L

Measuring ranges

– temperature: 8x -20…200°C

– pressure: 2x -1…1,5bar

– flow rate (water): 2x 0…800cm³/min

– flow rate (refrigerant): 1x 0…700L/h

– power: 0…1.200W

Dimensions and Weight

LxWxH: 1.210x510x900mm

Weight: approx. 110kg

Required for Operation

230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase

Water connection, drain