SR2021 21-capacity control and faults in refrigeration systems Vocational Education Equipment For School Lab Air Conditioner Trainer Equipment
Brand: ShouldShine
Model: SR2021
Learning Objectives / Experiments
- familiarisation with the key devices for changing the refrigeration capacity
* thermostat
* capacity controller
* start-up controller
* evaporation pressure controller
* condensation pressure controller
- fault finding in refrigeration system components
- effect of refrigerant supercooling
- familiarisation with defrosting methods
* electric defrost heater
* hot gas defrosting
- representation of the thermodynamic cycle in the log p-h diagram
Specification
[1] investigation of a refrigeration system with refrigeration and freezing chambers
[2] refrigeration circuit with compressor, condenser, capacity controller, start-up controller, combined pressure switch and 2 evaporators in insulated chambers
[3] each chamber with solenoid valve, thermostat, thermostatic expansion valve, fan and heat exchanger for refrigerant supercooling
[4] refrigeration chamber with evaporation pressure controller
[5] freezing chamber with electric defrost heater and hot gas defrosting
[6] separate or parallel operation of the chambers via solenoid valves
[7] simulation of 12 faults
[8] touch panel PC for fault activation, data acquisition, evaluation and representation in the log p-h diagram
[9] refrigerant R404a
Technical Data
Compressor
- refrigeration capacity: 2440W at -10/30°C
Condenser with fan
- volumetric air flow rate: 570m³/h
Evaporator transfer areas
- refrigeration chamber: 1,12m²
- freezing chamber: 1,88m²
Electric defrost heater: approx. 125W
Capacity controller: 0,2...6bar
Start-up controller: 0,2...6bar
Thermostat: 2x -25...15°C
Evaporation pressure controller: 0...5,5bar
Measuring ranges
- temperature: 6x -50...50°C; 5x 0...100°C
- pressure: 3x -1...12,5bar; 2x -1...24bar
- flow rate: 2x 1.5...22,5L/h
- compressor power consumption: 0...5kW
Dimensions and Weight
LxWxH: 2420x780x1900mm
Weight: approx. 280kg
Required for Operation
400V, 50Hz, 3 phases or 230V, 60Hz/CSA, 3 phases
