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Measurements of P?T properties, vapor pressures, saturated densities, and critical parameters for R 1234ze(Z) and R 245fa.

Author(s) : HIGASHI Y., HAYASAKA S., SHIRAI C., et al.

Type of article: Article, IJR article

Summary

Pressure-density-temperature (P?T) properties, vapor pressures, and saturated liquid and vapor densities for refrigerants R 1234ze(Z) (cis-1,3,3,3-tetrafluoroprop-1-ene; CF3CHdouble bond; length as m-dashCHF) and R 245fa (1,1,1,3,3-pentafluoropropane; C3H3F5) were measured with two types of isochoric methods. Pressure was measured with a digital quartz pressure transducer. Temperature was measured with 25 O standard platinum resistance thermometer on the ITS-90 temperature scale. Density was calculated from the mass of sample and the inner volume of pressure vessel. By using the present vapor pressure data, new vapor pressure correlations for R 1234ze(Z) and R 245fa have been formulated. In addition, the critical temperature Tc, critical density ?c, and critical pressure Pc were directly determined on the basis of direct observation of the meniscus disappearance.

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Pages: 100-108

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Details

  • Original title: Measurements of P?T properties, vapor pressures, saturated densities, and critical parameters for R 1234ze(Z) and R 245fa.
  • Record ID : 30014151
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 52
  • Publication date: 2015/04

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