The study unit allows to study the main features of a two-stage compression double-stage air compressor. The system includes two water chillers for cooling the air generated by the compressor, complete with thermo-resistances for measuring the air and water temperature at the inlet and outlet. The bench is wheeled and equipped with a front panel, on which are placed the maneuvering devices and all the necessary tools for carrying out the tests.
TRAINING PROGRAM
• System start up
• Measurement of temperatures at different compression stages
• Measurement of cooling water flow and determination of the amount of heat subtracted from the compressed air in the chillers
• Measurement of the air flow aspirated by the compressor
• Determination of the power and efficiency of an alternative compressor
• Measurements of air flow rates with unified throttling devices
• Calculation of compressor efficiency
• Compressor performance at variable speed
TECHNICAL SPECIFICATIONS
Two-cylinder reciprocating dual stage compressor
Driven by a belt drive by an electric motor c.a. with frequency variator:
• No-load device and pilot valve
• Supply check valve
• Flow rate: 450 l/min (referred to the suction conditions)
• Max delivery pressure: 11 bar
• Rpm sensor
N. 2 tube bundle coolers:
• Nominal air flow rate: 1,2 m3/min
• Max working pressure: 16 bar
• Air temperature: 0 ÷ 150 °C
• Water temperature: 0 ÷ 90 °C
Air tank:
• Capacity: 200 l
• 0÷16 bar dial gauge
• 1÷11 bar adjustable pressure switch, for compressor insertion and deactivation
• Safety valve
• Exhaust valve
Device for measuring the air flow aspirated by the compressor:
• Calibrated flange mounted on damping vessel
• Differential micromanometer with inclined scale for measuring the differential pressure at the flange
Electric control panel:
• Digital multimeter to measure: voltage, current and power drive motor
• N. 2 digital thermometers for instant reading of the temperature
• Differential magnetothermal switch
• Voltage presence warning lamp
• Power supply: 230 Vac 50 Hz single-phase – 3 kVA (Other voltage and frequency on request)
