析了气相声速与理想气体比定压热容的热力学关系，用超声变程干涉仪测定了1,1,1,2,3,3,3-七氟丙烷(HFC-227ea)的72组气相声速值，温度范围273-333 K，压力范围26-315 kPa，测量不确定度小于0.05%。根据这些实验数据，确定了HFC-227ea的理想气体比定压热容和声速第二维里系数，并分别拟合得到了与温度的函数，理想气体比定压热容的不确定度小于0.5%。使用方阱势能模型导出了HFC-227ea的第二维里系数，并与文献值进行了比较。
Based on thermodynamics, the relationship between thermodynamic parameters and gaseous speed of sound wasanalyzed. A total of 72 data of speed of sound for gaseous1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) were measured for temperatures from 273 to 333 K and pressures from 26 to 315 kPa with acylindrical, variable-path acoustic interferometer operating at 156.252 kHz.The uncertainty of speed of sound was less than 0.05%. The ideal-gasheat capacity at constant pressure and the second acoustic virial coefficients were determined over the temperature range from thespeed of sound measurements. The uncertainty of the ideal-gas heatcapacity at constant pressure was estimated to be less than 0.5%.The ideal-gas heat capacity at constant pressure results and secondvirial coefficients calculated from the present speed of sound measurements were compared with the available data.
参考文献
| [1] | Zhu M S;Han L Z;Zhang K Z et al.Sound Velocity andIdeal-Gas Specific Heat of 1,1,1[J].Int J Thermophys,1993,14:1039-1050. |
| [2] | Wirbser H;Brauning G;Gurtner J et al.Flow-Calorimetric Specific Heat Capacities and Joule-Thomson Coefficients ofCF3CHFCF3(R227)-A New Working Fluid in Energy Technics-at Pressure Up to15 MPa and Temperatures Between 253K and 423K[J].Journal of Chemical Thermodynamics,1992(24):761-772. |
| [3] | Hirschfelder J O;Curtiss C F;Bird R B.Molecular Theory ofGases and Liquids[M].New York:wiley,1954:158-159. |
| [4] | Park Y J.Bestimmung des Thermischen Verhaltens NeuerArbeitsstoffe der Energietechnik mit Hilfe einer Burnett-Apparatur:[J].Universitat Karlsruhe,1993 |
| [5] | Shi L;Duan Y Y Zhu M S et al.Gaseous PVT Properties of 1,1,1,2,3,3,3-Heptafluoropropane[J].Journal of Chemical and Engineering Data,1999,44:1402-1408. |
| [6] | Patek J;Klomfar J;Prazak J et al.The(P,,T) Behaviour of 1,1,1,2,3,3,3-Heptafluoropropane(HFC-227ea) Measured with a Burnett Apparatus. J[J].Journal of Chemical Thermodynamics,1998(30):1159-1172. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%