(h, ln (P)) chart of a vapor
Gap-fill exercise
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Identification of the main areas and curves of the chart
The (h, ln (P)) chart of a condensable vapor has three large zones, A, B and C, separated by the
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
of the fluid, in black.
In this chart,
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
is indicated on the abscissa, and
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
on the ordinate, most often on a logarithmic scale, so that the zone corresponding to the low pressures is more readable.
Zone A represents the
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
, zone B the
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
, and zone C the
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
.
The curves in blue are the
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
, the curves in red are the
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
, and the curves in purple are the
enthalpy
iso-quality
isotherm
liquid
liquid-vapor equilibrium
pressure
reversible adiabatic
vapor
vaporization curve
.
Check
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