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Measurement of sound speeds in the liquid phase of hydrochlorofluoroolefins (HCFO).

Number: pap. n. 464

Author(s) : NISHIYAMA T., HONDA T., GAO L., et al.

Summary

Hydrochlorofluoroolefins (HCFOs) are promising candidates for next-generation refrigerants. Accordingly, more accurate equations of state are desired for this kind of refrigerants. On the other hand, highly accurate speed of sound measurement has been enabled by the advancement of technology, and therefore the speed of sound data of the refrigerant has become one of important thermodynamic properties to improve equations of state. In this study, we aim to measure the speed of sound of HCFOs in liquid-phase. The measurement apparatus is mainly composed of a sound velocity sensor and a standard resistance temperature detector and two pressure transducers. The measurements were conducted in the range of temperature from 300 to 400 K at pressures up to 10 MPa. At first, we measured the liquid-phase speed of sound of difluoromethane to evaluate the accuracy of the apparatus. The consistency was evaluated between speed of sound data obtained in this work and calculated values form available equations of state.

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Details

  • Original title: Measurement of sound speeds in the liquid phase of hydrochlorofluoroolefins (HCFO).
  • Record ID : 30025996
  • 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.2019.0464

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