Share

IIR document

Novel cascade ejector cycle using natural refrigerants.

Number: pap. ID: 490

Author(s) : CARDEMIL J., COLLE S.

Summary

This study focuses on the thermodynamic analysis of a cascade ejector refrigeration cycle. Two environmentally-friendly fluids are use: water for the upper cycle and CO2 for the lower one. The conjugation of the two ejector cycles is proposed in order to operate the CO2 sub-cycle with subcritical pressures, thus increasing the coefficient of performance (COP). Due to the characteristics of these natural fluids, the traditional one-dimensional analysis cannot be applied to ejector performance prediction. Thus, the ejectors are analyzed using an improved methodology based on real gas equations and Wood’s approximation for two-phase speed of sound calculations. Using this methodology simulations are carried out in order to analyze the effect of the operation temperature of the intercoolers, regarding to the operation of a solar-assisted ice maker. The results show that under the base case conditions the COP of the system is 0.2, and this value is highly dependent on the operational temperature of the intercooler.

Available documents

Format PDF

Pages: 8 p.

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: Novel cascade ejector cycle using natural refrigerants.
  • Record ID : 30003214
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

Links


See other articles from the proceedings (569)
See the conference proceedings

Indexing