Share

IIR document

The research on mixed-refrigerant fractionation refrigeration system for low-temperature instruments.

Author(s) : SHI Y., HU C. X.

Summary

Mixed-refrigerant fractionation refrigeration system is applied in low temperature instruments in order to let up the volume and reduce the weight of refrigeration system. In this paper, 2-stage condenser-evaporator, high and low temperature regenerators are put together to improve on a combined heat exchanger. For using fluid seal as pumps, U-bend tubes are designed at the liquid outlet of the condenser and every separator. On the basis of these, the condensing pressure, evaporation pressure, minimum evaporation temperature, maximum starting pressure of different ratio non-azeotropic mixed-refrigerant are discussed through experiments respectively. Then the experiments of temperature dropping between the former series-parallel connection and the improved system of single-stage compression, 2-stage fractionation refrigeration system are predicted in a low temperature cooling circulation instrument with 5 liters/-80°C. The results indicate the effect of R-134a/R-23 is better than the others for its minimum refrigerating temperature and the temperature dropping of the improved system is faster, so it can replace cascade refrigeration system.

Available documents

Format PDF

Pages: ICR07-B2-99

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: The research on mixed-refrigerant fractionation refrigeration system for low-temperature instruments.
  • Record ID : 2008-0009
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

Links


See other articles from the proceedings (839)
See the conference proceedings

Indexing