coebw-2

LN2/LHe FACILITY ~ NITROGEN and HELIUM DATA



NITROGEN (N2) DATA:

Boiling Point
  • 77.35 Kelvin (-320.44 oF) @ 1 Atm.

    Liquid Density @ 77.35 K @ 1 Atm.
  • 50.35 lbs./ft.3
  • 806.5 kg/m3

    Gas Density @ 70 oF @ 1 Atm.
  • 0.07244 lbs./ft.3
  • 1.16 kg/m3

    Gas Density @ 32 oF @ 1 Atm.
  • 0.07806 lbs./ft.3
  • 1.25 kg/m3

    Gas Density @ 77.35 K @ 1 Atm.
  • 0.2885 lbs./ft.3
  • 4.622 kg/m3

    Latent Heat of LN2 @ 77.35 K
  • 198.8 J/g

    Liquid to Gas Ratio
  • 1 liter LN2 = 24.54 ft.3 N2 @ stp*
    * ( stp was calculated using 70 oF )

    References:
  • Calculations were made using EES (Engineering Equation Solver) V.6.294, UW-Madison by S. A. Klein and F. L. Alvarado.
  • Nitrogen calculations were made using data from: "Thermodynamic Properties of Nitrogen from the Freezing Line to 2000 K at Pressures to 1000 MPa" by R.T. Jacobsen, R.B. Stewart, and M. Jahangiri; J. Phys, Chem, Ref. Data, Vol. 15, No. 2, 1986.


  • HELIUM (He4) DATA:

    Boiling Point
  • 4.214 Kelvin (-452.1 oF) @ 1 Atm.

    Liquid Density @ 4.214 K
  • 7.808 lbs./ft.3
  • 125.1 kg/m3

    Gas Density @ 70 oF @ 1 Atm.
  • 0.01034 lbs./ft.3
  • 0.1657 kg/m3

    Gas Density @ 32 oF @ 1 Atm.
  • 0.01114 lbs./ft.3
  • 0.1785 kg/m3

    Gas Density @ 4.214 K @ 1 Atm.
  • 1.045 lbs./ft.3
  • 16.74 kg/m3

    Latent Heat of LHe @ 4.214 K
  • 20.75 J/g

    Liquid to Gas Ratio
  • 1 Liter LHe = 26.67 ft.3 He @ stp*
    * ( stp was calculated using 70 oF )

    References:
    1.) Calculations were made using EES (Engineering Equation Solver) V.6.294, UW-Madison by S. A. Klein and F. L. Alvarado.
    2.) Helium calculations were made using data from: "A New Wide Range Equation of State for Helium" by R.D. McCarty and V.D. Arp; Advances in Cryogenic Engineering, Vol. 35, pp. 1465-1475, 1990.


  • LN2/LHe FACILITY
    1339A Engr. Hall
    1415 Engineering Dr.
    Madison, WI 53706-1607

    Copyright 2007 The Board of Regents of the University of Wisconsin System

    Last Updated: 08/17/12
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    Telephone:
    (608) 263-5473