Transport properties saturation line

TABLE 24. Transport Properties of Freon-21 on the Saturation Line (Continued)... 

Table 14.9. Transport properties of nitrogen along the saturation line.

Table 14.14 contains the values of the viscosity and the thermal conductivity of ethane along the saturation line. This table also serves the purpose of providing a check for those programming the rq>resentative equations by giving the tabulation of the transport properties at particular temperatures and densities. For more detailed tables the reader is referred to Hendl et al. (1994) and Vesovic et al. (1994). 

Coefficients of the equadon of state and of the equation for transport properties are stored for each substance. Parameters of the critical point and coefficients of equations for calculadon of the ideal-gas functions, the saturated vapor pressure and the melting pressure are kept also. The thermal properties in the single-phase region and on the phase-equilibrium lines can be calculated on the basis of well-known relations with use of these coefficients. The system contains data for 30 reference substances monatomic and diatomic gases, air, water and steam, carbon dioxide, ammonia, paraffin hydrocarbons (up to octane), ethylene (ethene), propylene (propene), benzene and toluene. The system can calculate the thermophysical properties of poorly investigated gases and liquids and of multicomponent mixtures also on the basis of data for reference substances. 

Natural gas, found in geological accumulations, normally refers to the gaseous fossil-based equivalent of oil. Its composition varies widely, from high concentrations of nitrogen and carbon dioxide to (almost) pure methane. In general, it contains low concentrations of the higher (saturated) hydrocarbons, which influence the physical properties and may present condensation problems in high-pressure transport lines. 

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