Critical Parameters and Vapor Pressure Measurements of Hydrofluoroethers at High Temperatures

2003 ◽  
Vol 48 (6) ◽  
pp. 1368-1379 ◽  
Author(s):  
Masahiko Yasumoto ◽  
Yasufu Yamada ◽  
Jyunji Murata ◽  
Shingo Urata ◽  
Katsuto Otake
Keyword(s):  
Vapor Pressure ◽  
High Temperatures ◽  
Critical Parameters ◽  
Pressure Measurements ◽  
Vapor Pressure Measurements

PVT Measurements and Critical Parameters of Water

1983 ◽  
Vol 22 ◽  
Author(s):  
H. Hanafusa ◽  
K. Kawai ◽  
H. Sato ◽  
M. Uematsu ◽  
K. Watanabe
Keyword(s):  
Vapor Pressure ◽  
Scaling Law ◽  
Density Variation ◽  
Critical Parameters ◽  
Pressure Measurements ◽  
Vapor Pressures ◽  
Constant Temperature Bath ◽  
Pvt Properties ◽  
Pvt Measurements ◽  
Vapor Pressure Measurements

ABSTRACTThe PVT properties and vapor-pressures of water have been measured in the critical region by using a constantvolume apparatus immersed in the constant-temperature bath with the procedure of varying the sample mass along a prescribed isotherm. Ninety-one PVT and five vapor-pressure measurements along 11 isotherms cover the region of temperatures 643 to 673 K and of pressures 19.7 to 38.6 MPa, which corresponds to a density variation from 108 to 618 kg/m3. The experimental uncertainties of temperature, pressure and density are estimated 4 mK, 5 kPa and 0.04%, respectively. Based on these measurements, the critical parameters of water are proposed to be 647.061 K, 22.041 MPa and 322.4 kg/m3 by the scaling law analysis.

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