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Thermo Tables for r-144a

  1. Nov 1, 2007 #1
    I have some equipment that uses an older refrigerant that I am having a hard time finding any uselful data on. It is r-144a, and if anyone has any idea as to where I could find a thermo properties table on this stuff, let me know. I've been looking everywhere, hundreds of websites, countless books, and nothing. Any info would be greatly appreciated.
     
  2. jcsd
  3. Nov 1, 2007 #2

    stewartcs

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    Never seen anything on R-144a...R-143a I have, but not 144a.
     
  4. Nov 2, 2007 #3

    FredGarvin

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    How about R-134a? I have not heard of either of those.
     
  5. Nov 2, 2007 #4

    stewartcs

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    I have the properties for R-143a and R-134a if you need them.
     
  6. Nov 2, 2007 #5

    FredGarvin

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    There's a 143a? Huh. Ya learn something new every day.
     
  7. Nov 2, 2007 #6

    stewartcs

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    Yep. I have a NIST database full of useful information on fluids. NIST used to offer the data on their website, but they sell it now in a nice and tidy little program.
     
  8. Nov 4, 2007 #7
    I didn't double check when I posted, I actually need thermo properties on r-141b. Not sure if r-144a even exists. If the equipment used r-134a, this would be a lot easier, you can find those tables everywhere. Still, if anyone can tell me where to look for these tables, I would appreciate it.
     
  9. Nov 4, 2007 #8

    stewartcs

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    R141b - CCl2FCH3 - 1,1-dichloro-1-fluoroethane

    CAS#: 1717-00-6
    Molar mass: 116.95 lbm/lbmol
    Triple point temperature: -154.25 °F
    Normal boiling point temperature: 89.69 °F
    Critical point temperature: 399.83 °F
    Critical point pressure: 610.9 psia
    Critical point density: 28.627 lbm/ft³
    Gas phase dipole at NBP: 2.014 debye
    Acentric factor: 0.2195

    Equation of State
    Equation type: Helmholtz energy
    Limits: -154.25 °F to 440.33 °F, 58015.0 psia, 91.7 lbm/ft³
    Lemmon, E.W. and Span, R., "Short Fundamental Equations of State for 20 Industrial Fluids," J. Chem. Eng. Data, 51:785-850, 2006.

    The equation has uncertainties of 0.2% in density between 180 and 400 K at pressures to 100 MPa, and 0.5% in density at higher pressures. The uncertainty in density may be higher as temperatures approach 400 K. Vapor pressures are represented with an uncertainty of 0.2% from 270 to 400 K. The uncertainty in speed of sound is 0.01% in the vapor phase and 0.5% in the liquid phase. Heat capacity data are not available to verify the equation of state, however, the uncertainties are estimated to be within 5 %.

    Viscosity and Thermal Conductivity
    Limits: -154.25 °F to 440.33 °F, 58015.0 psia, 91.7 lbm/ft³
    Huber, M.L., Laesecke, A., and Perkins, R.A., "Model for the Viscosity and Thermal Conductivity of Refrigerants, Including a New Correlation for the Viscosity of R134a", Industrial and Engineering Chemistry Research, 42:3163-3178, 2003.

    SOURCE: NIST Database

    Hope this helps...

    Chris
     
  10. Nov 7, 2007 #9

    Mech_Engineer

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    RefProp is a very cool program. making your own thermodynamic tables is so very nice.

    That being said, NIST does have a very large amount of fluid properties available online for free (including R-141b):

    http://webbook.nist.gov/chemistry/fluid/
     
  11. Nov 7, 2007 #10

    stewartcs

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    I knew they used to have that web database, I had lost the link though since I had the program.

    Good to know they still offer it for free! RefProp has a lot more functionality than the web database though.
     
  12. Feb 20, 2010 #11
  13. Mar 4, 2010 #12
    Thank you for this great topic
    And you will find more information on this subject

    On this link

    R-141b refrigerant


    Thank you over again
     
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