SR2009 Refrigeration System With Refrigeration And Freezing Chamber Teaching Equipment Refrigeration Lab Equipment

Learning Objectives / Experiments

– 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 supercooling

* 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 evaporatio 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] LabVIEW 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