Share

Experiences with CO2 supermarkets in New Zealand.

Experiencias en supermercados con CO2 en Nueva Zelanda.

Author(s) : BERGE J., REES B., SHAPIRO D.

Type of article: Article

Summary

This article is the Spanish translation of a paper presented at the 12th International Refrigeration and Air Conditioning Conference, Purdue University, USA (see the Bulletin of the IIR, reference 2010-1929). CO2 secondary systems were determined to be a good choice for supermarket refrigeration in New Zealand and Australia with emphasis on energy efficiency and reduced carbon footprint. Through March 2008, three sites have been successfully installed in New Zealand and one in Australia, and additional sites are planned. Compared to similar R404A direct expansion systems, overall warming effect was reduced 29%, R404A charge was reduced 74%, and energy use was reduced approximately 5% on average. Due to very high volumetric capacity of CO2, care should be taken not to turn on all cooling loads at once. Timers were used to ensure loads would be staged on after, for example, an unplanned shutdown. To ensure adequate temperature control, individual display cabinet control is recommended. CO2 secondary systems were determined to be a good choice for supermarket refrigeration in New Zealand and Australia with emphasis on energy efficiency and reduced carbon footprint. Through March 2008, three sites have been successfully installed in New Zealand and one in Australia, and additional sites are planned. Compared to similar R404A direct expansion systems, overall warming effect was reduced 29%, R404A charge was reduced 74%, and energy use was reduced approximately 5% on average. Due to very high volumetric capacity of CO2, care should be taken not to turn on all cooling loads at once. Timers were used to ensure loads would be staged on after, for example, an unplanned shutdown. To ensure adequate temperature control, individual display cabinet control is recommended.

Available documents

Format PDF

Pages: pp. 32-36 (5 p.)

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Experiencias en supermercados con CO2 en Nueva Zelanda.
  • Record ID : 2011-0226
  • Languages: Spanish
  • Subject: HFCs alternatives
  • Source: Frío Calor Aire acondicionado - vol. 38 - n. 425
  • Publication date: 2010/05

Links


See other articles in this issue (1)
See the source

Indexing