本文介绍了一套自行研制的制冷工质PVT实验系统.该系统的温度控制采用改进的增量式数字PID算法,由自行开发的测控软件进行计算机实时测控.实验结果表明,在整个适用温度范围内温度测量精度可达士5 mK.压力测量系统最大不确定度为±1.5 kPa.利用本装置,测量了HFC-227ea的蒸气压,并拟合了一个Wagner型蒸气压方程,结果与文献值吻合很好.
参考文献
| [1] | 胡芃,陈则韶,罗大为,程文龙.制冷工质PVT实验用精密低温恒温槽的研制[J].仪器仪表学报,2002(04):414-416,426. |
| [2] | M Salvi Narkhede;Bao Huai Wang;James L Adcock et al.Vapor Pressures Liquid Molar Volumes, Vapor Non- Ideality, and Critical Properties of Some Partially Fluorinated Ethers (CF3OCF2CF2H, CF3OCF2H, and CF3OCH3), Some Perfluoroethers (CF3OCF2OCF3, cCF2OCF2OCF2, and c-CF2 CF2 CF2O), and of CHF2Br and CF3CFHCF3[J].Journal of Chemical Thermodynamics,1992(24):1065-1075. |
| [3] | Lin Shi;Yuan Yuan Duan;Ming Shan Zhu et al.Vapor Pressure of 1,1,1,2,3,3,3-Heptafiuoropropane[J].Fluid Phase Equilibria,1999,163:109-117. |
| [4] | L A Weber .清华大学段远源博士提供[Z].,2001. |
| [5] | J Patek;J Klomfar;J Prazak et al.The (T p,ρ) 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. |
| [6] | W A Wagner.A New Correlation Method for Thermodynamic Data Applied to the Vapor-Pressure Curve for Argon Nitrogen, and Water[M].IUPAC Thermodynamic Tables Project Centre,1977 |
| [7] | Dana R;Defibaugh Michael R Moldover .Compressed and Saturated Liquid Densities for 18 Halogenated Organic Compounds[J].Journal of Chemical and Engineering Data,1997,42:160-168. |
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