Research Topic

Recent Progress and Breakthroughs in Non-Conventional Refrigeration Systems

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About this Research Topic

With the increase of population and economic activities, the need for efficient refrigeration technologies is becoming increasingly important.  At the same time, international initiatives are trying to regulate both harmful gas emissions and the use of HFC refrigerants. In this context, it appears important to develop new technologies and concepts with higher thermodynamic efficiency whilst accessing new resources. This is especially true for the air conditioning and refrigeration industry. According to the Netherlands Environmental Assessment Agency, while energy demand continues to rise due to several economic, demographic or societal factors and the availability of energetic resources gets scarcer, the worldwide energy demand for cooling will overtake the energy used for heating by 2060. New technologies making real breakthroughs for cooling and refrigeration need to therefore be developed.

In this Research Topic, we invite academic and industrial researchers to submit original research papers and/or reviews that discuss the recent advances on non-conventional refrigeration systems and their key components. New experimental or numerical methods dedicated to refrigeration systems as well as new results about the properties of novel refrigerants are also welcome. Thus, the potential topics include, but are not limited to:

• Single and two-phase ejectors
• Ranque-Hilsch vortex tubes
• Hybrid cycles
• Heat pumps
• Caloric materials and devices
• CO2 refrigeration systems
• Drop-in replacement by novel refrigerants (HFO, CO2…)
• Trigeneration technologies (sorption cycles)
• Renewable or waste heat driven refrigeration cycles
• Advanced numerical models applied to refrigeration system components
• Experimental facilities and measurement techniques dedicated to refrigeration technologies


Keywords: Ejector, Ranque-Hilsch vortex tube, trigeneration system, heat pump, caloric device


Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

With the increase of population and economic activities, the need for efficient refrigeration technologies is becoming increasingly important.  At the same time, international initiatives are trying to regulate both harmful gas emissions and the use of HFC refrigerants. In this context, it appears important to develop new technologies and concepts with higher thermodynamic efficiency whilst accessing new resources. This is especially true for the air conditioning and refrigeration industry. According to the Netherlands Environmental Assessment Agency, while energy demand continues to rise due to several economic, demographic or societal factors and the availability of energetic resources gets scarcer, the worldwide energy demand for cooling will overtake the energy used for heating by 2060. New technologies making real breakthroughs for cooling and refrigeration need to therefore be developed.

In this Research Topic, we invite academic and industrial researchers to submit original research papers and/or reviews that discuss the recent advances on non-conventional refrigeration systems and their key components. New experimental or numerical methods dedicated to refrigeration systems as well as new results about the properties of novel refrigerants are also welcome. Thus, the potential topics include, but are not limited to:

• Single and two-phase ejectors
• Ranque-Hilsch vortex tubes
• Hybrid cycles
• Heat pumps
• Caloric materials and devices
• CO2 refrigeration systems
• Drop-in replacement by novel refrigerants (HFO, CO2…)
• Trigeneration technologies (sorption cycles)
• Renewable or waste heat driven refrigeration cycles
• Advanced numerical models applied to refrigeration system components
• Experimental facilities and measurement techniques dedicated to refrigeration technologies


Keywords: Ejector, Ranque-Hilsch vortex tube, trigeneration system, heat pump, caloric device


Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

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