Key Features:

• Compact, mobile unit
• Works as single-stage, two-stage or two-stage intercooled compressor
• Independently controlled compressor units, both with variable-speed dynamometer drives
• Clear, fully-instrumented control panel with mimic diagram
• Low-noise footprint
• Completely fail-safe operation – interlocks and pressure-relief valves prevent misuse

Description:

• This test set has two independently-controlled, motordriven compressors, intercooler and air receiver. It works as a single-stage, two-stage or two-stage compressor
  with intercooler. All controls and instrumentation are on an easy-to-operate mimic panel.
• Electronic drive units independently control both motors. Meters show motor electrical power consumption of each motor. A close-coupled load cell on each motor measures torque. A sensor on each motor measures speed, shown by a digital indicator. The product of the torque and speed gives true shaft power
• To allow students to study different types of air compressor systems, diverter valves allow air to move in different directions. These include:
  • From the first stage to the receiver
  • Directly to the second stage
  • To the second stage, by means of the integral water-cooled intercooler
• Interlocks allow safe changes from one method of operation to another while the equipment works, and prevent misuse. For safety, all pressurised lines have relief
  valves.

Learning Outcomes:

A range of experiments and tests based on:

• Volumetric, mechanical and Isothermal efficiency
• Indicated work done
• Motor output power (compressor shaft power)
• Pressure ratio
• Temperature ratio
• Inlet dryness calculations
• P-V indicator diagram (needs optional pressure indicator)
• Effect of inter-stage cooling on compressor total power requirements and effect on cycle temperatures
• Effect of two-stage compression and inter-stage pressure on power requirements