HFC-227ea是一种有希望的新环保制冷剂，特别是作为混合物中的一种组元用于R22和R502的替代，但其热物性数据十分有限。本文使用膨胀定容法高精度地测量了HFC-227ea的气相PVT性质，沿定温线外推确定了其第二和第三维里系数，并与文献值进行了比较；使用截断维里方程，根据本文所确定的维里系数，可以高精度地再现HFC-227ea的气相区热力性质
One hundred forty one pressure-volume-temperature datapoints for 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) in gaseous phasehave been measured using Burnett/isochoric methods. Burnett expansionmeasurements were made both at 363.15 K and 318.15 K. Based on thepressure-density relationships established at 363.15 K and 318.15 K,data were collected along 9 isochores for temperatures from 283 to 377 K,pressures from 0.26 to 2.5 MPa. The maximum temperature uncertainty andmaximum pressure uncertainty in this work were estimated to bewithin 10 mK and 500 Pa, respectively. Based on the present data, the virialcoefficients of HFC-227ea were determined and compared with the resultsof literature. The sample purity is 99.9 mass %
参考文献
| [1] | D R Defibaugh;M R Moldover .Compressed and SaturatedLiquid Densities for 18 Halogenated Organic Compounds[J].Journal of Chemical and Engineering Data,1997,42:650-652. |
| [2] | Y J Park .Bestimmung des thermischen Verhaltensneuer Arbeitsstoffe der Energietechnik mit Hife einerBurnett-Apparatus: [Ph.D Thesis][D].Germany: Universitat Karlsruhe,1993. |
| [3] | J Patek;J Klomfar;J Prazak et al.The (P T) Behaviour of 1 1 1 2 3 3 3 - Heptafluoropropane (HFC-227ea) Measured with a Burnett Apparatus[J].Journal of Chemical Thermodynamics,1998(30):1159-1172. |
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