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Saturation dome
A saturation dome is a graphical representation of the combination of vapor and gas that is used in thermodynamics. It can be used to find either the pressure or the specific volume as long as one already has at least one of these properties.
==Description==
A saturation dome uses the projection of a P–''v''–T diagram (pressure, specific volume, and temperature) onto the P–''v'' plane. This gives a P–''v'' diagram at a constant temperature. The points that create the left-hand side of the dome represent the saturated liquid states, while the points on the right-hand side represent the saturated vapor states (commonly referred to as the “dry” region). On the left-hand side of the dome there is compressed liquid and on the right-hand side there is superheated gas.〔Klein, Sanford, and Gregory Nellis. 'Thermodynamics'. Cambridge University Press. 2012.〕Within the dome itself, there is a liquid–vapor mixture. This two-phase region is commonly referred to as the “wet” region. The percentage of liquid and vapor can be calculated using vapor quality.〔Arora, C P. 'Thermodynamics'. McGraw Hill, 1998, p. 65〕 The triple state line is where the three phases (pressure, specific volume, and temperature) exist in equilibrium.
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