SR2042 42-capacity control in refrigeration systems Vocational Education Equipment For School Lab Air Conditioner Trainer Equipment
Brand: ShouldShine
Model: SR2042
Learning Objectives / Experiments
- key devices for changing the refrigeration capacity
* thermostat
* evaporation pressure controller
* refrigeration controller
* capacity controller
* compressor with variable speed
- operation of a refrigeration controller with specification of temperatures for
* controlling the refrigeration capacity
* switching the defrost heater on and off
* switching the fans on and off
Specification
[1] methods for capacity control in refrigeration systems
[2] refrigeration circuit with compressor, condenser and 2 evaporators in insulated refrigeration chambers
[3] each refrigeration chamber with adjustable heater to generate a cooling load, thermostatic expansion valve and fan
[4] 1 refrigeration chamber with refrigeration controller for temperature control; solenoid valve, fan and defrost heater as actuators
[5] 1 refrigeration chamber with thermostat, solenoid valve and evaporation pressure controller for temperature control
[6] compressor with variable speed via frequency converter
[7] capacity controller in the compressor bypass
[8] Refrigerant R134a, CFC-free
Technical Data
Compressor
- refrigeration capacity: approx. 560W at -5/25°C
and 1.450min-1
- drive motor: 550W
2 heaters: approx. 500W
4 fans: max. air flow: approx. 50m³/h
1 defrost heater: approx. 75W
Refrigeration controller
- 7 inputs
- 7 outputs
Evaporation pressure controller: 0...5,5bar
Thermostat: -5...20°C
Capacity controller: 0,2...6bar
Measuring ranges
- motor speed: 1.100...2.700min-1
- temperature: 3x -60...50°C
- heater power: 2x 0...1.000W
- pressure: 3x -1...9bar; 1x -1...24bar
Dimensions and Weight
LxWxH: 1.100x750x1.900mm
Weight: approx. 150kg
Required for Operation
230V, 50/60Hz, 1 phase
