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Experimental study of hybrid ejector system with R290 driven by low-grade waste heat.

Number: 0024

Author(s) : YOSHIDA T., ELBEL S.


Heat driven ejector refrigeration systems are promising solutions for utilizing thermal energy from waste heat. However, the main drawbacks of this system are low efficiency at high ambient temperature conditions and difficult controllability. Hybrid ejector system is a promising solution for overcoming these drawbacks. In this study, an experimental study of the hybrid ejector system which uses R290 is performed and compared with conventional vapor compression system performance. The investigations are focused on chilled water supply conditions at various condensation temperature conditions ranging from 15 °C to 35 °C. Low-grade waste heat at 70 °C is used to drive the ejector. The seasonal performances are compared using climatic data from Tokyo. The experimental results show that this system performs better than the vapor compression system at all condensation temperature conditions, and a 66 % seasonal COP improvement is expected. This study clearly demonstrates the potential of the hybrid ejector system.

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Pages: 8 p.


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  • Original title: Experimental study of hybrid ejector system with R290 driven by low-grade waste heat.
  • Record ID : 30029662
  • Languages: English
  • Subject: Technology
  • Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
  • Publication date: 2022/06/13
  • DOI:
  • Document available for consultation in the library of the IIR headquarters only.


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