Saturated Vapor

saturated vapor

[′sach·ə‚rād·əd ′vā·pər]
(thermodynamics)
A vapor whose temperature equals the temperature of boiling at the pressure existing on it.

Saturated Vapor

 

vapor that is in thermodynamic equilibrium with a liquid or solid of the same chemical composition.

A liquid and its saturated vapor are in dynamic equilibrium: the number of molecules escaping from the liquid and passing into the vapor phase per unit time is equal to the number of molecules returning to the liquid during the same interval. Satu rated vapor without suspended particles of the liquid is called dry; vapor containing liquid droplets is called wet. The dry saturated vapor state is extremely unstable, since the slightest heat loss leads to partial condensation of the saturated vapor and transforms it into a wet vapor, whereas the slightest heat gain transforms it into a superheated vapor. In the temperature and pressure interval in which thermodynamic equilibrium between the liquid and vapor can exist (between the triple point and the critical point), a fixed saturated vapor temperature corresponds to each pressure. The curve representing the relationship between the saturated vapor pressure and the temperature reflects at the same time the dependence of the boiling point or condensation point on the pressure. The liquid densities are also related in a definite way to the saturated vapor densities. The pressure and density of the saturated vapor increase with increasing temperature, whereas the density of the liquid decreases.

References in periodicals archive ?
The reason is that the saturated vapor pressure of water in air reduces as pressure increases.
The pressure-enthalpy chart for a refrigerant contains a couple of boundary lines, representing the heat content of the fluid when it is liquid on the point of boiling (the saturated liquid line) and when it is gas on the point of condensing (the saturated vapor line).
On leaving the EVA as saturated vapor, the mixture flows to the HEC, in its central tube, and exchanges heat with the liquid solution flowing in the annular space.
As the adipates added, the saturated vapor pressure of methanol-gasoline system reduces with the increasing the length of carbon chain over adipates.
Further, they have proposed the analytical method to predict the LOE of multi-species component mineral oils by using the saturated vapor pressure and the vaporization heat of oil species, and investigated the LOC mechanism comparing the LOE with the LOC measured under the whole operating conditions with a practical diesel engine.
Because of throttling action in the damping groove, pressure in the pump chamber abruptly drops to the saturated vapor pressure about -98.9 KPa of fluid when the plunger is at the BDC; however, the overshoot gradually increases to the normal condition with increasing flow area.
Normally, to avoid cavitation, the static pressure head at the pump inlet must be higher than the saturated vapor pressure by some margin, which is defined as the cavitation margin and is expressed as [18]
Thereafter, Langmuir adsorption isotherm is a case of BET adsorption isotherm, in which the pressure is much lower than saturated vapor pressure.
where P(V) is the liquid pressure on the bubble surface which is equal to the pressure inside the bubble, [P.sub.c] is saturated vapor pressure of the gas inside the bubble, [P.sub.0] is the initial gas pressure inside the bubble, [V.sub.0] is the initial volume of bubble and [sigma] is the Surface tension of the liquid inside the cavity.
When the vacuum chamber pressure below the temperature corresponding to the saturated vapor pressure, water start gasification, food noodles take away heat can be quantified as the following formula.
Further value of [T.sub.d] is defined by method of simple iterations The compressor has to create pressure in the condenser that would be equal to saturated vapor pressure at temperature [T.sub.d], i.e.