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Absolute density measurements of hydrocarbon refrigerants by the dual-sinker magnetic levitation densimeter.

Mediciones de densidad absoluta de hidrocarburos refrigerantes mediante el densímetro de levitación magnética con doble lastre.

Author(s) : KAYUKAWA Y., KANO Y., FUJII K.

Type of article: Article

Summary

This article is the Spanish translation of an article presented at the IIR-Gustav Lorentzen conference on natural working fluids, in Copenhagen, Denmark (see this issue of the Bulletin, reference 2010-1777). Currently most precise densimeter with magnetic levitation has limit of accuracy due to a magnetic force-transmission loss, by about 100 ppm of density. In this report, the authors present their new PVT property measurement system with originally developed magnetic levitation densimeter (MLD). They have proposed an improved method to eliminate the uncertainty caused by magnetic force working on diamagnetic fluid, by introducing dual sinkers and controlling their levitation height of the magnetic coupling. This technique can almost eliminate the force transmission error. The authors have constructed a new MLD with prescribed advantage, by designing a novel weight-exchange mechanism with a magnetic coupling. The experimental range is up to 345 K for temperature, 5 MPa for pressure, respectively. The experimental results with less uncertainty are compared with available equations of state for hydrocarbon refrigerants in order to evaluate their PVT property reproducibility.

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Pages: pp. 3-7 (4 p.)

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Details

  • Original title: Mediciones de densidad absoluta de hidrocarburos refrigerantes mediante el densímetro de levitación magnética con doble lastre.
  • Record ID : 2010-1778
  • Languages: Spanish
  • Source: IIF-IIR/Frío Calor Aire acond. - vol. 37 - n. 418
  • Publication date: 2009/10

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