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Experimental evaluation of a multi-ejector trans-critical CO2 system for supermarkets.

Number: pap. n. 787

Author(s) : SINGH S., HAFNER A., BANASIAK K., et al.

Summary

In the present experimental study, the performance of a multi-ejector based trans-critical CO2 cooling system is tested at high ambient temperature up to 46°C for a supermarket application with and without internal heat exchanger (IHX) and evaporative cooling. The experimental results indicate that the evaporative cooler capacity reaches a maximum at 10 cm pad thickness. However, a very marginal improvement is observed in terms of COP and PIR (Power Input Ratio) for 15 cm pad thickness. Maximum improvement in COP with IHX and evaporative cooler are 11% and 40% respectively. On the other hand, maximum reduction in the system PIR with IHX and evaporative cooler are 8.5% and 26% respectively. However, marginal enhancement in COP and PIR of 4% and 6% are observed respectively with 15 cm cooling pad thickness. From the study, it is evident that the evaporative cooling for the gas cooler of the CO2 system seems a potential solution to its application at high ambient temperature.

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  • Original title: Experimental evaluation of a multi-ejector trans-critical CO2 system for supermarkets.
  • Record ID : 30026212
  • Languages: English
  • Subject: Developing country
  • 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.2019.0787

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