Page 323 - Characterization and Properties of Petroleum Fractions - M.R. Riazi

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7. APPLICATIONS: ESTIMATION OF THERMOPHYSICAL PROPERTIES 303

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FIG. 7.3—Effect of temperature on liquid density at pressure P. Unit conversion: ρ [g/cm ] =
3
◦
◦
ρ[lb/ft ]/62.4; F = ( C) × 1.8 + 32. Taken with permission from Ref. [8].
Figure 7.1 gives effect of temperature on the liquid specific figure may be used for calculation of density of liquids at low
gravity (SG). Once SG at 60 F (15.5 C) is known, with the use pressures where the effect of pressure on liquid density can be
◦
◦
of this figure specific gravity at temperature T (SG T ) can be neglected (pressures less than ∼50–70 bar). Figure 7.2 shows
determined. Then density at T and 1 atm can be determined effect of pressure on density at 60 F and Fig. 7.3 shows effect
◦
through multiplying specific gravity by density of water. This of T on liquid density at any pressure P (P > 1000 psia or

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