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3.4 Property tables
Therefore, properties are frequently presented in the form of tables. Some thermodynamic properties
can be measured easily, but others cannot and are calculated by using the relations between them and
measurables properties.
Specific
internal Specific Specific
enthalpy of
energy of entropy of
Saturation saturated saturated saturated
Temperature liquid liquid
liquid
Specific Specific Specific Specific
Saturation volume of internal enthalpy entropy of
Pressure saturated energy of of saturated
vapor saturated saturated vapor
vapor
SPECIFIC VOLUME
v = volume of a liquid + volume of drysteam
total mass of wet steam
v = vf(1 – x) + vgx
v = xvg
Where,
3
vf = specific volume of saturated liquid (m /kg)
vg = specific volume of saturated steam (m /kg)
3
x = dryness fraction
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