ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • refrigerants  (4)
  • 1, 1-dichloro-2, 2, 2-trifluoroethane  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Estimating the virial coefficients of small polar molecules (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 461-482 
    Details
    ISSN: 1572-9567
    Keywords: density ; PVT ; polar molecules ; refrigerants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We adapt existing models for estimating the second and third virial coefficients of small molecules to the halogenated methanes and ethanes. We compare the results with the abundant new, high-qualityPVT data resulting from the search for alternative refrigerants. The present model provides an accurate method for calculating densities, and therefore it should provide reliable thermodynamic properties and fugacity coefficients. We give equations and parameters useful for estimating the properties of pure refrigerants and their mixtures when noPVT data are available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01563708
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The vapor pressure of 1,1,1,2-tetrafluoroethane (R134a) and chlorodifluoromethane (R22) (1992)
    Springer
    International journal of thermophysics 13 (1992), S. 837-854 
    Details
    ISSN: 1572-9567
    Keywords: Burnett apparatus ; chlorodifluoromethane (R22) ; ebulliometry ; refrigerants ; 1,1,1,2-tetrafluoroethane (R134a) ; vapor pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We measured the vapor pressure of chlorodifluoromethane (commonly known as R22) at temperatures between 217.1 and 248.5 K and of 1,1,1,2-tetrafluoroethane (commonly known as R134a) in the temperature range 214.4 to 264.7 K using a comparative ebulliometer. For 1,1,1,2-tetrafluoroethane at pressures between 220.8 and 1017.7kPa (corresponding to temperatures in the range 265.6 to 313.2K), additional measurements were made with a Burnett apparatus. We have combined our results for 1,1,1,2-tetrafluoroethane with those already published from this laboratory at higher pressures to obtain a smoothing equation for the vapor pressure from 215 K to the critical temperature. For chlorodifluoromethane our results have been combined with certain published results to provide an equation for the vapor pressure at temperatures from 217 K to the critical temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503911
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The vapor pressure of 1, 1-dichloro-2, 2, 2-trifluoroethane (R123) (1992)
    Springer
    International journal of thermophysics 13 (1992), S. 999-1009 
    Details
    ISSN: 1572-9567
    Keywords: 1, 1-dichloro-2, 2, 2-trifluoroethane ; ebulliometry ; R123 ; refrigerant ; vapor pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The vapor pressure of 1, 1-dichloro-2, 2, 2-trifluoroethane (R123) has been measured at temperatures between 256.4 and 453.8 K by ebulliometric and static techniques. These results have been combined to obtain a correlation for the vapor pressure from 256.4 K to the critical temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01141211
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The virial coefficients of five binary mixtures of fluorinated methanes and ethanes (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 863-880 
    Details
    ISSN: 1572-9567
    Keywords: hydrofluorocarbons ; PVT, polar gases ; refrigerants ; virial coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have made new measurements of the gas-phasePVT surface of five binary mixtures of hydrofluorocarbons (HFCs) in a Burnett/isochoric apparatus. The components chosen all have moderate to large reduced dipole moments. We presentPVT data, derived mixture virial coefficients, cross second virial coefficients, and binary interaction parameters for these systems, and we compare the results with a recently published model for calculating second and third viral coefficients of polar gases and their mixtures. That model accounts for the polar nature of the molecules with a term containing the reduced dipole moment,μ R, and it contains mixing rules for the substance-specific parameters needed to calculate the second and third cross virial coefficients. The model and data are in satisfactory agreement. and the model can be used to greatly extend the useful range of the limited set of data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01447099
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Vapor pressures and gas-phase PVT data for 1,1,1,2-tetrafluoroethane (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 617-627 
    Details
    ISSN: 1572-9567
    Keywords: chlorofluorocarbons ; density ; PVT ; refrigerants ; saturated vapor ; vapor pressure ; virial equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present new data for the vapor pressure and PVT surface of 1,1,1,2-tetrafluoroethane (Refrigerant 134a) in the temperature range 40° C (313 K) to 150° C (423 K). The PVT data are for the gas phase at densities up to one-half critical. Densities of the saturated vapor are derived at five temperatures from the intersections of the experimental isochores with the vapor pressure curve. The data are represented analytically in order to demonstrate experimental precision and to facilitate calculation of thermodynamic properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00507983
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...