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Thermodynamic property evaluation of carbon dioxide.

Number: pap. P02

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

Summary

Thermodynamic properties for carbon dioxide, which is used as working fluids for heatpump systems especially for hot-water generation, were extensively evaluated in this study. Reasonable and reliable thermodynamic property information is very important not only for development of equipments but also as objective criteria of performance evaluation of systems developed. Therefore, gas-phase PVT properties were measured by means of originally developed magnetic levitation densimeter with dual-sinker system. In this study, a set of equations of state, including saturation property correlation or PVT relation in single-phase for carbon dioxide were also developed on the basis of the originally evaluated experimental data from literatures. The authors have originally estimated degree of correlation of the experimental data and put them into a covariance matrix used in a least square fitting. By using this procedure, reasonable values of variance and covariance for optimized parameters are obtained, thus it allows us to calculate the uncertainty of the fitted equation.

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Pages: 8 p.

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Details

  • Original title: Thermodynamic property evaluation of carbon dioxide.
  • Record ID : 30000597
  • Languages: English
  • Source: Measures to address climate change. 2010 International Symposium on Next-generation Air Conditioning and Refrigeration Technology: February 17-19, Tokyo, Japan.
  • Publication date: 2010/02/17

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