Behavior of A Piston Compressor


Test stand for piston compressor from refrigeration open process with air typical open two-cylinder compressor drive via asynchronous motor with frequency converter for speed adjustment

Inlet pressure and outlet pressure (pressure ratio) adjustable via valves instruments: flow meter, sensors for pressure, temperature, speed, torque (via force) data acquisition via PLC, access to stored measured values via Ethernet

Technical Data

  1. PLC
  2. Compressor
  3. Speed: 465…975min-1
  4. Number of cylinders: 2
  5. Stroke: 26mm
  6. Borehole: 35mm
  7. Displaced Volume: 50cm3 Drive motor
  8. Power: 550W
  9. Speed: 0…975min-1

Measuring Ranges

  1. Torque: 0…10Nm
  2. Speed: 0…10000min-1
  3. Power: 0…600W
  4. Temperature: 0…100°C, 0…200°C
  5. Flow rate: 0…4 m3/h
  6. Pressure sensor: -1…1,5bar / -1…24bar
  7. 230V, 50Hz, 1 phase; 230V, 60Hz, 1 phase
  8. 120V, 60Hz, 1 phase; UL/CSA optional

Dimensions and Weight

  1. LxWxH: 1512x790x1414mm
  2. Weight: approx. 148kg
  3. Required for operation ventilation: 3,2m3/h

Learning objectives/experiments

  • Determine characteristic variables of a piston compressor during experiments
  • Determination of the volumetric efficiency at different intake pressures, pressure ratios and speeds
  • Determination of the isothermal compressor capacity
  • Measurement of the mechanical and electrical power consumption in dependence of the high/low pressure and pressure ratio
  • Determination of the mechanical efficiency and the overall efficiency