Refrigeration Unit OperationEMT/GRFRIG-E

Who should attend?

  • This course provides a clear understanding of cooling system technology, performance and operating issues.
Audience :
  • Engineers, technicians, maintenance staff involved in refrigeration unit operation in process plants.

Level : Proficiency

Course Content

  • COOLING CYCLE & GAS COMPRESSION

      • Liquid-vapor balance; enthalpy diagrams. Liquid coolant properties (R717, CO2, etc.).
      • Basic cooling cycle, evolution on the enthalpy diagram. Gas compression in an actual compressor: temperature, pressure and enthalpy changes. Examples of different cooling cycles integrated within specific process units: chilled water, cryogenic storage, etc.
  • HEAT TRANSFER & COMPRESSORS

      • Heat transfer efficiency; consequence to operation costs. Technology.
      • Typical condenser and vaporizer designs, related operation constraints. Troubleshooting.
      • Reciprocating - Screw and centrifugal compressors.
      • Operating conditions; flow control; power control.
      • Compressor descriptions; oil and seal technologies; oil separators.
      • Oil properties, selection criteria, viscosity. Troubleshooting.
  • REFRIGERATION UNIT CONTROL

      • Pressure, level, flow and temperature controls. Internal and external disturbances.
      • Adaptation of the refrigeration cycle on the enthalpy diagram. Automatic and manual adjustments for different process requirements.
  • ON LINE MONITORING & TROUBLESHOOTING - HVAC SYSTEM

      • Start-up and shutdown. Monitoring: temperatures, ∆T, pressures, oil carry over, oil quality, exchanger fouling, leakage, air entrance, air purge, moisture problem.
      • Troubleshooting studies. HVAC system equipment and operation features - International standards.
      • Natural or forced ventilation, air handling equipment: humidity control, filtration and cleaning.
      • Heating or cooling: heat pump operation with reverse cooling cycle and defrost control.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • explain the technology and operating principles of cooling systems,
  • analyze the technical solutions implemented for the installation of cooling systems,
  • participate in a troubleshooting analysis.

Ways & Means

  • Use of participants' experience and teamwork.
  • Course material and case studies based on actual examples from the industry.