Refrigeration Principles and Systems – 6 Weeks Blended Learning

Refrigeration Principles and Systems – 6 Weeks Blended Learning           

Refrigeration Principles Day – €450 (Testing €400, QQI €50)

Refrigeration Principles Online Course – €175



Refrigeration Principles Online Course Learning Outcomes:

  1. Explain SI System.
  2. Explain the fundamental physical, chemical and engineering terms and principles applicable to refrigeration.
  3. Distinguish between sensible heat, latent heat and specific heat and describe their application in refrigeration.
  4. Explain what is meant by subcooling and superheating and state their relevance to refrigeration systems.
  5. Calculate the enthalpy of water and refrigerants at various temperatures.

Systems Components

  1. Explain the function and principle of operaton of compressors, condensers, metering devices and evaporators.
  2. Describe the function, construction, application and principle of operation of a range of mechanical, electromechanical and electronic high-side and low-side sytem components.
  3. Describe the function, construction, application and principle of operation of the components in oil distribution systems.

Learning Outcomes:

  1. Explain the refrigeration vapour compression cycles of basic and direct staged systems.
  2. Read/interpret refrigerant circuit drawings.
  3. Illustrate, label and explain vapour compression and absorption refrigeration systems.
  4. Explain the function of primary and secondary refrigeration systems.
  5. Differentiate between packaged systems and site assembled systems.
  6. Identify the application and design of cascade refrigeration systems.

Refrigeration Properties

  1. Identify common refrigerants by their designated number.
  2. State the colour code for common refrigerants.
  3. List the desirable properties of a refrigerant.
  4. Identify applications for the common refrigerants.
  5. Analyse a pressure temperature diagram.
  6. Use pressure enthalpy diagrams for the common refrigerants.
  7. Discuss the desirable properties of a refrigeration lubricant.
  8. Explain the types of lubrication.
  9. State the safety requirements for handling refrigerants and lubricants.


  1. Define mechanical and electronic refrigerant flow controls.
  2. Describe the operation of pressure and temperature operated controls, solenoid valves, time clocks and motors.
  3. Explain the operation of six types of refrigeration flow control.
  4. Compare the various charged elements used on thermostatic expansion valves.
  5. Distinguish between refrigeration operating and safety controls.
  6. Explain the function and construction of refrigeration operating and safety controls.
  7. Outline the operation of safety and operation controls.
  8. State the application of operating and safety controls.
  9. State the importance of sensor/bulb location with controls.

Health and Safety

  1. Outline the relevant health and safety regulations and laws, including the Safety, Health and Welfare at Work Act 1989 and 1992/1995 Regulations.
  2. Demonstrate knowledge of electric shock, prevention and treatment.
  3. Follow manufacturers’ instructions for safe handling and storage of refrigerants.
  4. List the PPE needed to work with refrigerants.
  5. State the hazards associated with pressurized vessels.
  6. Appreciate the hazards of refrigerant liquid burns.
  7. State the dangers of working in temperatures below 6°C
  8. Explain the need for good housekeeping principles and practice.


Refrigeration Principles Day Full Day Classroom Based Lecture and test 8.00AM – 4.00PM
A detailed explanation of what is expected for the test, as well as practical demonstrations and practice.

A practical and theory test is used to gauge the student’s knowledge and ability. All techniques will be demonstrated, and the practical tasks can be practiced before testing.

There are also exercises and a project that must be delivered. Full details of these will be discussed during the online module.


Vocational training is VAT exempt

Contact Garrett:  Tel: 087 6909231