Discover the 33rd IIR Informatory Note on "Cogeneration/Trigeneration"

This Informatory Note discusses the operating principles of cogeneration and trigeneration as well as their advantages and challenges.
Download the new IIR Informatory Note on Refrigeration Technologies



Energy is a major challenge for the future.

It is a concern connected to environmental issues: global warming in particular is a key issue that has to be addressed by the cooling sector, whose energy demand increases constantly.

As such, a more reasonable use of energy and the development of new technologies for the production of energy are necessary.



Cogeneration and trigeneration: Alternative technologies for energy production


Offering high efficiency through the recovery of thermal waste, cogeneration and trigeneration are valuable alternative technologies for energy production.

The development of cogeneration, which consists of the production of two energies simultaneously, is a viable option for raising the effectiveness of energy use.


Generally, power and heat are produced, and in this case the cogeneration is called Combined Heat and Power (CHP). Trigeneration, also called Combined Cold Heat and Power (CCHP), adds a third energy: cooling.

These technological solutions offer many environmental and economic benefits.



This Informatory Note discusses the operating principles of cogeneration and trigeneration as well as their advantages and challenges.


It was prepared by Michel Feidt (Secretary of IIR Commission E2), Jean-Luc Dupont (Head of the Scientific and Technical Information Department) and Alexis Oger (Informatory Note writer), and was reviewed by several IIR experts.




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View the 33rd IIR Informatory Note on “Cogeneration/Trigeneration” and all of our previous Informatory Notes, including:


  • The 29th IIR Informatory Note onThe Role of Refrigeration in the Global Economy” which highlights the importance of the refrigeration sector, expected to grow further in the coming years due to increasing cooling needs in various areas and global warming.
  • The 27th IIR Informatory Note on “Evaporative Cooling”, which gives a state-of-art of the practical technology and, using simplified representations, also explains the engineering principle as well as different operating system modes.




About IIR Informatory Notes

The IIR publishes Informatory Notes designed to meet the needs of decision-makers worldwide, on a regular basis. These notes summarise knowledge in key refrigeration-technology and refrigeration-application domains. Each note puts forward future priority developmental axes and provides IIR recommendations in this context.