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  • 1
    Electronic Resource
    Electronic Resource
    Revised viscosities for HFC-134a + glycol mixtures from 273 to 333 K (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 109-115 
    Details
    ISSN: 1572-9567
    Keywords: ethylene glycol ; diethylene glycol ; HFC-134x ; polyethylene glycol(400) ; polypropylene glycol(2000) ; tetraethylene glycol ; triethylene glycol ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The liquid viscosity of six binary mixtures of HFC-134a with glycols [ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol(400), and polypropylene glyco](2000)] was measured in the temperature range from 273 to 333 K. The viscosity was measured with an improved capillary viscometer instead of the rolling-ball viscometer reported in our previous work. The measurement uncertainty was estimated to be 1.6%. Most of the present data are higher than previous data, and the gap between the two sets of data increases further in low-viscosity regions. The present results obtained with laminar flow are more reliable than previous results, which are indefinite because of the limit of usefulness of the rolling-ball viscometer in low-viscosity regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439249
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Prediction of saturated liquid viscosity for some halocarbon refrigerants based on the van der Waals model (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 567-571 
    Details
    ISSN: 1572-9567
    Keywords: close-packed volume ; halocarbon ; saturated liquid ; van der Waals model ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The viscosity data of saturated liquid halocarbon refrigerants are satisfactorily predicted by a method based on the hard-sphere theory of transport properties. The hard-sphere close-packed volume can be correlated with Bondi's hardsphere volume. The absolute average deviations between calculated and experimental values for 15 halocarbon refrigerants are 6.3%. It is found that the proposed method can give better results than the previous methods proposed by Gordon et al., Li and Poole, and Srinivasan and Murthy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01563714
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    Paper (German National Licenses)
    Fulltext
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