LN_{2}/LHe FACILITY ~ NITROGEN and HELIUM DATA

NITROGEN (N_{2}) DATA:
Boiling Point
77.35 Kelvin (320.44 ^{o}F) @ 1 Atm.
Liquid Density @ 77.35 K @ 1 Atm.
50.35 lbs./ft.^{3}
806.5 kg/m^{3}
Gas Density @ 70 ^{o}F @ 1 Atm.
0.07244 lbs./ft.^{3}
1.16 kg/m^{3}
Gas Density @ 32 ^{o}F @ 1 Atm.
0.07806 lbs./ft.^{3}
1.25 kg/m^{3}
Gas Density @ 77.35 K @ 1 Atm.
0.2885 lbs./ft.^{3}
4.622 kg/m^{3}
Latent Heat of LN_{2} @ 77.35 K
198.8 J/g
Liquid to Gas Ratio
1 liter LN_{2} = 24.54 ft.^{3} N_{2} @ stp*
* ( stp was calculated using 70 ^{o}F )
References:
Calculations were made using EES (Engineering Equation Solver) V.6.294, UWMadison 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 (He^{4}) DATA:
Boiling Point
4.214 Kelvin (452.1 ^{o}F) @ 1 Atm.
Liquid Density @ 4.214 K
7.808 lbs./ft.^{3}
125.1 kg/m^{3}
Gas Density @ 70 ^{o}F @ 1 Atm.
0.01034 lbs./ft.^{3}
0.1657 kg/m^{3}
Gas Density @ 32 ^{o}F @ 1 Atm.
0.01114 lbs./ft.^{3}
0.1785 kg/m^{3}
Gas Density @ 4.214 K @ 1 Atm.
1.045 lbs./ft.^{3}
16.74 kg/m^{3}
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 ^{o}F )
References:
1.) Calculations were made using EES (Engineering Equation Solver) V.6.294, UWMadison 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. 14651475, 1990.

LN2/LHe FACILITY
1339A Engr. Hall
1415 Engineering Dr.
Madison, WI 537061607
Copyright 2007 The Board of Regents of the University of Wisconsin System
Last Updated: 08/17/12
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Telephone:
(608) 2635473

