Thermophysical Properties: Helium
From Thermal-FluidsPedia
Helium, He, Molecular Mass: 4.0, (Tsat = -268 °C; Tm = -271 °C) T Temp. °C pv saturation pressure (105 Pa) hlv latent heat (kJ/kg) ρℓ liquid density (kg/m³) ρv vapor density (kg/m³) μℓ liquid viscosity (10-7 N-s/m²) μv vapor viscosity (10-8 N-s/m²) kℓ liquid thermal conductivity (W/m-K) kv vapor thermal conductivity a (W/m-K) σ liquid surface tension (10-3N/m) cp,ℓ liquid specific heat b (kJ/kg-K) cp,v vapor specific heat (kJ/kg-K) -271 0.06 22.8 148.3 26.0 390 20 0.0181 0.00393 0.26 5.18 2.045 -270 0.32 23.6 140.7 17.0 370 30 0.0224 0.00607 0.19 2.49 2.699 -269 1.00 20.9 128.0 10.0 290 60 0.0277 0.00803 0.09 3.99 4.619 -268 2.29 4.0 113.8 8.5 134 90 0.0350 0.00962 0.01 11.5 6.642
References
Dunn, P. and Reay, D.A. 1982, Heat Pipes, Pergamon Press, New York.
Faghri, A., and Zhang, Y., 2006, Transport Phenomena in Multiphase Systems, Elsevier, Burlington, MA.
Faghri Amir , Zhang Yuwen , Howell John, 2010, Advanced Heat and Mass Transfer, Global Digital Press, Columbia, MO
Touloukian, Y.S., Liley, P.e>, and Saxena, S.C., eds., 1970, Thermophysical Properties of Matter, Vol. 3, Plenum, New York, NY.
Vargaftik, N.B., 1975, Handbook of Physical Properties of Liquids and Gases, Hemisphere, New York, NY.