Description
Learning Objectives / Experiments of Refrigeration System With Refrigeration And Freezing Chamber
– Design and components of a refrigeration system with 2 evaporators
– Components and their functions
* compressor, condenser, evaporator
* thermostatic expansion valve
* evaporation pressure controller
* pressure switch
* electric defrost heater
– Thermodynamics of the refrigeration cycle
* effect of refrigerant super cooling
* representation of the thermodynamic cycle
in the log p-h diagram
* Determination of important characteristic variables
* coefficient of performance
* refrigeration capacity
* compressor work
– Fault finding in refrigeration system components
Specification
1. Investigation of a refrigeration system with refrigeration and freezing chambers
2. Refrigeration circuit with compressor, condenser and 2 evaporators with thermostatic expansion valve and evaporation pressure controller
3. Insulated freezing chamber with fan and electric defrost heater
4. Insulated refrigeration chamber with evaporation pressure controller
5. Heat exchanger for refrigerant supercooling
6. Individual or parallel operation of the chambers via solenoid valves
7. Simulation of 18 faults
8. Lab VIEW software for data acquisition via USB under Windows XP or Windows Vista
9. Refrigerant R134a, CFC-free
Technical Data
Compressor
– power consumption: 491W at 5/40°C
– refrigeration capacity: 1104W at 5/40°C
Condenser with fan
– air flow: 290m³/h
– transfer area: 1,5m²
Refrigeration chamber
– evaporator transfer area: 1,06m²
Freezing chamber
– evaporator transfer area: 2,42m²
– fan air flow: 135m³/h
– electric defrost heater: approx. 150W
Evaporation pressure controller: 0…5,5bar
Measuring ranges
– temperature: 12x -50…120°C
– pressure: 1x -1…15bar, 3x -1…9bar, 3x -1…24bar
– power: 0…1000W
– flow rate: 1,5…23,5L/h
Dimensions and Weight
LxWxH: 2000x670x1900mm
Weight: approx. 285kg
Connections
230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase
