TWK - Test- und Weiterbildungszentrum Wärmepumpen und Kältetechnik GmbH


Automotive A/C-Systems with R744 (CO2)


  • introduction to the refrigerant circuit
  • properties of the refrigerant R744 compared to R134a or R1234yf
  • transcritical refrigerant circuit
  • optimal high pressure regulation
  • system analysis with the p, h-diagram
  • components
    • expansion device
    • compressor
    • evaporator
    • gas cooler
    • accumulator
    • internal heat exchanger
  • safety issues

Objective target

  • introduction to basics of the refrigerant circuit with R744
  • understanding of the functionality and the operating performance of transcritical R744 systems
  • comparison with conventional refrigerant circuits

Target group

The course is addressed to master craftsmen, technicians and engineers, e. g. with the justification on engine construction or process engineering, who will be employed as professionals and entrants respectively in automotive air-conditioning. The course is also focused to employees in the range of construction, quality assurance, application and examination procedures. In the context of this course, the compression refrigeration system is concerned practice oriented in the special application of the automotive refrigeration system.



Knowledge of the refrigeration technology is required (see PFBA or OFBA).

Procedure, organizational details

The event will be held as a live online training with Webex or Tems. Participants need an internet access with microphone. A webcam can be used, but is not required. Questions to the speaker can be asked directly via chat function and microphone or afterwards via e-mail. The course documents are provided as pdf.


Live online training: 1 day
9 am – 4:30 pm


Live online training: 1 day
9:00 – 16:30 o´clock

Termine und Gebühren

KW/Jahr: 40/2023
Datum: 04.10.
Preis: 490,- €
Kurs storniert
KW/Jahr: 29/2024
Datum: 17.07.
Preis: 520,- €

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