Share

IIR document

Online composition measurements of refrigerant mixtures by optical fibres and infrared spectroscopy.

Number: pap. n. 1223

Author(s) : TOBALY P., TERRIER M. F.

Summary

As refrigeration and heat pump industries use more and more mixtures as refrigerants it is useful to measure the composition of the fluid at different locations in the machine. For our own research purposes on mixture based cycles, we have implemented an online non-intrusive technique based on infrared spectroscopy. This paper describes the apparatus used and also the data treatment that allows to extract valuable information from the recorded spectra. The calibration of the method for a given mixture is obtained by recording spectra with known concentrations, pressure and temperature. Partial least squares (PLS) or principal component regression (PCR) statistical methods are used to build a model. Then compositions can be determined for unknown mixtures. Results are presented for CO2+Propane mixtures. The sensitivity of the method to baseline treatment is tested. The best accuracy obtained so far is of the order of 2% The method is well tested and can be applied to other mixtures.

Available documents

Format PDF

Pages: 8

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: Online composition measurements of refrigerant mixtures by optical fibres and infrared spectroscopy.
  • Record ID : 30026083
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1223

Links


See other articles from the proceedings (632)
See the conference proceedings

Indexing