Share

IIR document

Determining vapour presence at expansion valves inlet by an impedance sensor.

Author(s) : ROCHA M. S., SIMÕES-MOREIRA J. R.

Summary

An experimental study of the refrigerant vapour presence at expansion valves inlet is proposed in this work. An impedance sensor was developed for determining the void fraction aiming at to produce an electrical signal for a refrigerant mass flow control system in a regular refrigeration mechanical compression cycle. A discussion of the experimental technique, procedure as well as the main causes of vapour presence at expansion valves inlet, and its consequences, is analysed in this study. Experimental facility of 5.0 kW mechanical compression refrigeration cycle using the alternative refrigerant R-417A are presented, and the influence of mass flow trough a thermostatic expansion valve and an electronically controlled expansion valve, with and without vapour presence is discussed. As a goal, the work aims at to furnish a possible new tool for improving the cycle control system.

Available documents

Format PDF

Pages: ICR07-B2-1317

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: Determining vapour presence at expansion valves inlet by an impedance sensor.
  • Record ID : 2008-0157
  • 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