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First measurement results of cooling and heat-pump operation of an environmental test chamber using CO2 as refrigerant.

Number: pap. n. 509

Author(s) : WAGNER A., TANNERT T., HESSE U.

Summary

The EU F-Gas Regulation brings a strict schedule for phase-down and a ban of synthetic high-GWP refrigerants. Small industry sectors like manufacturers of environmental simulation chambers are affected as well. Recent announcements of supply constraints and a massive price increase led to the question if new drop-in alternatives are available. CO2 is a well-known and sustainable, alternative refrigerant. It becomes also an option for the environmental test chamber industry. A former work shows a concept of an environmental test chamber using CO2 as refrigerant. Its cooling cycle allows also to operate in a heat-pump mode. It was theoretically evaluated by a transient simulation model. This study shall answer the question if the concept is working in reality. First measurements of a test rig containing the new concept cycle are made and presented. The measurement results show a significant energy saving potential. Furthermore a lower chamber temperature can be achieved in comparison to a baseline chamber using R452A.

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Pages: 8

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Details

  • Original title: First measurement results of cooling and heat-pump operation of an environmental test chamber using CO2 as refrigerant.
  • Record ID : 30026225
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0509

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