Share

IIR document

Integration of the expander/compressor into the supermarket CO2 cooling system.

Author(s) : RIHA J., NICKL J., QUACK H.

Summary

The primary objectives to use a combined expander/compressor unit in a CO2 refrigeration cycle are to improve the COP and to reduce the exhaust pressure of the main compressor of the system. With the successful development of such an expander/compressor at the TU Dresden, the primary objectives have been reached. As a next step it will be investigated how this machine can be integrated into a supermarket cooling system. In summer as well as in warmer regions of the world the ambient temperature is higher than the critical temperature of CO2. That means that the refrigeration system operates in a trans-critical mode. The expander was originally developed for such operating conditions. But in Central and Northern Europe and many other regions of the world, the ambient temperature is during long periods of the year so low, that the condensing pressure of the CO2 refrigeration system can be kept below 70 bars, i.e. that the cycle can be operated in a subcritical mode. This requirement implicates for the expander quite different working conditions.

Available documents

Format PDF

Pages: 2006-2

Available

  • Public price

    20 €

  • Member price*

    Free

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

Details

  • Original title: Integration of the expander/compressor into the supermarket CO2 cooling system.
  • Record ID : 2007-1629
  • Languages: English
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29

Links


See other articles from the proceedings (111)
See the conference proceedings

Indexing