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PVT measurements of water-ammonia refrigerant mixture in the critical and supercritical regions.

Author(s) : POLIKHRONIDI N. G., ABDULAGATOV I. M., BATYROVA A., et al.

Type of article: Article, IJR article

Summary

The PVTx properties of H2O + NH3 mixture (0.2607 mole fraction of ammonia) have been measured in the near- and supercritical regions. Measurements were made along 40 liquid and vapour isochores in the range from 120.03 to 727.75 kg/m3 and at temperatures from 301 to 634 K and at pressures up to 28 MPa. Temperatures and densities at the liquid-gas phase transition curve, dew- and bubble-pressure points, and the critical parameters for the 0.7393 H2O + 0.2607 NH3 mixture were obtained using the quasi-static thermograms and isochoric (P-T) break-point techniques. The expanded uncertainty of the density, pressure, temperature measurements at the 95% confidence level with a coverage factor of k = 2 is estimated to be 0.06%, 0.02-0.09%, and 15 mK, respectively.

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Pages: pp. 1897-1913

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Details

  • Original title: PVT measurements of water-ammonia refrigerant mixture in the critical and supercritical regions.
  • Record ID : 2009-2355
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 8
  • Publication date: 2009/12

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