A thermodynamic property formulation for nitrogen from the freezing line to 2000 k at pressures to 1000 Mpa
A new fundamental equation explicit in Helmholtz energy for thermodynamic properties of nitrogen from the freezing line to 2000 K at pressures to 1000 MPa is presented. A new vapor pressure equation and equations for the saturated liquid and vapor densities as functions of temperature are also included. The techniques used for development of the fundamental equation are those reported in a companion paper for ethylene. The fundamental equation and the derivative functions for calculating internal energy, enthalpy, entropy, isochoric heat capacity (C /SUB v/ ), isobaric heat capacity (C /SUB p/ ), and velocity of sound are also included in that paper. The property formulation using the fundamental equation reported here may generally be used to calculate pressures and densities with an uncertainly of +/-0.1%, heat capacities within +/-2%, and velocity of sound values within +/-2%. The fundamental equation is not intended for use near the critical point.
- Research Organization:
- Univ. of Idaho, Moscow, ID
- OSTI ID:
- 7006607
- Report Number(s):
- CONF-850617-
- Journal Information:
- Int. J. Thermophys.; (United States), Journal Name: Int. J. Thermophys.; (United States) Vol. 7:3; ISSN IJTHD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
CALIBRATION STANDARDS
CRYOGENICS
DENSITY
ELEMENTS
EQUATIONS
EQUATIONS OF STATE
FLUIDS
GASES
LIQUIDS
MELTING POINTS
NITROGEN
NONMETALS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SATURATION
SOUND WAVES
STANDARDS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VAPORS
VELOCITY
VERY HIGH PRESSURE
VERY HIGH TEMPERATURE
WAVE PROPAGATION