Skip to main content
SpringerLink
Log in

Precise Measurements of the Vapor-Liquid Equilibria (VLE) of HFC-32/134a Mixtures Using a New Apparatus

  • Published:
International Journal of Thermophysics Aims and scope Submit manuscript

Abstract

A new apparatus for precise measurements of the vapor-liquid equilibria of mixtures by the circulation method has been developed. This apparatus has two special components: a high-stability temperature control system and a helium pressurization system. The temperature in the liquid bath surrounding the sample cell is kept constant within ±0.5 mK. The helium pressurization system increases the pressure of the sampled mixture when measuring the compositions at low temperatures by gas chromatography. With these components, the uncertainty in measuring the vapor-liquid equilibria has been reduced. Using this apparatus, the vapor-liquid equilibria of HFC-32/134a mixtures were measured in a temperature range of 263.15 to 293.15 K. These results are in good agreement with the calculated results from REFPROP (Ver. 6.01) with a relative pressure difference of about 2%.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

REFERENCES

  1. K. Watanabe and Y. Higashi, ASME Paper, 86-WA/HT-72 (1986).

  2. K. Tochigi, K. Hasegawa, N. Asano, and K. Kojima, J. Chem. Eng. Data 43:954 (1998).

    Google Scholar 

  3. J. V. Widiatmo, H. Sato, and K. Watanabe, High Temp. High Press. 25:677 (1993).

    Google Scholar 

  4. C. D. Holcomb, J. W. Magee, J. L. Scott, S. L. Outcalt, and W. M. Haynes, NIST Technical Note 1397 (1997).

  5. E.-Y. Chung and M. S. Kim, J. Chem.Eng. Data 42:1126 (1997).

    Google Scholar 

  6. Y. Higashi, Int. J.Thermophys. 16:1175 (1995).

    Google Scholar 

  7. M. Nagel and K. Bier, Int. J. Refrig. 18:534 (1995).

    Google Scholar 

  8. M. O. McLinden, S. A. Klein, E. W. Lemmon, and A. P. Peskin, Thermodynamic and Transport Properties of Refrigerants and Refrigerant Mixtures, NIST Standard Reference Database 23 (REFPROP), Version 6.01 (National Institute of Standards and Technology, Boulder, Colorado, 1998).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Fluid Properties Section, Material Properties and Metrological Statistics Division, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan

    S. Shimawaki & K. Fujii

  2. Department of Mechanical Engineering, Iwaki Meisei University, 5-5-1 Iino, Chuodai, Iwaki, Fukushima, 970-8551, Japan

    Y. Higashi

Authors
  1. S. Shimawaki
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. K. Fujii
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Y. Higashi
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Shimawaki, S., Fujii, K. & Higashi, Y. Precise Measurements of the Vapor-Liquid Equilibria (VLE) of HFC-32/134a Mixtures Using a New Apparatus. International Journal of Thermophysics 23, 801–808 (2002). https://doi.org/10.1023/A:1015407205188

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1015407205188

Search

Navigation