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Measurements of the (T, p, p) behaviour of 1,1,1,2,3,3,3-heptafluoropropane (refrigerant R227) in the liquid phase

✍ Scribed by J. Klomfar; J. Hrubý; O. Šifner


Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
176 KB
Volume
26
Category
Article
ISSN
0021-9614

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✦ Synopsis


Measurements of the ( (T, p, \rho) ) behaviour for (1,1,1,2,3,3,3)-heptafluoropropane (R227) were performed with a constant-volume cell at temperatures from (205 \mathrm{~K}) to (315 \mathrm{~K}) and pressures up to (52 \mathrm{MPa}). The uncertainties for pressure (p), temperature (T), and density (\rho), measurements were estimated to be (\pm 0.02 \mathrm{~K}, \pm 0.001 \cdot p), and (\pm 0.001 \cdot \rho), respectively. Purity of the sample used was 99.99 mass per cent. Two methods based on the maximum-likelihood principle have been applied to reduce repeated measurements to both discrete values and to a short-range equation of state.


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