Capacity Control In Refrigeration Systems
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Refrigeration circuit with compressor, condenser and 2 evaporators in insulated refrigeration chambers
Methods for capacity control in refrigeration systems
Compressor with variable speed via frequency converter
Capacity controller in the compressor by pass
Each refrigeration chamber with adjustable heater to generate a cooling load, thermostatic expansion valve and fan
1 refrigeration chamber with thermostat, solenoid valve and evaporation pressure controller for temperature control
1 refrigeration chamber with refrigeration controller for temperature control; solenoid valve, fan and defrost heater as actuators
Refrigeration Controller
3 outputs
3 inputs
Thermostat: -5...20°C
Evaporation pressure controller: 0...5,5bar
Capacity controller: 0,2...6bar
Compressor
Drive motor: 550w
Refrigeration capacity: approx. 560w at -5/25°c and 1450min-1
4 fans: max. Volumetric air flow rate: approx. 36,5m³/h
2 heaters: approx. 500w
1 defrost heater: approx. 75w
Measuring Ranges
Heater power: 2x 0...1000w
Pressure: 3x -1...9bar; 1x -1...24bar
Compressor speed: 465...975min-1
Temperature: 3x -60...50°c.
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