Vapor quality

In thermodynamics, vapour quality is the mass fraction in a saturated mixture that is vapour; in other words, saturated vapour has a 'quality' of 100%, and saturated liquid has a 'quality' of 0%. Vapour quality is an intensive property which can be used in conjunction with other independent intensive properties to specify the thermodynamic state of the working fluid of a thermodynamic system. It has no meaning for substances which are not saturated mixtures (for example, compressed liquids or superheated fluids).Vapor quality is an important quantity during the adiabatic expansion step in various thermodynamic cycles (like Organic Rankine cycle, Rankine cycle, etc.). Working fluids can be classified by using the appearance of droplets in the vapour during the expansion step. In thermodynamics, vapour quality is the mass fraction in a saturated mixture that is vapour; in other words, saturated vapour has a 'quality' of 100%, and saturated liquid has a 'quality' of 0%. Vapour quality is an intensive property which can be used in conjunction with other independent intensive properties to specify the thermodynamic state of the working fluid of a thermodynamic system. It has no meaning for substances which are not saturated mixtures (for example, compressed liquids or superheated fluids).Vapor quality is an important quantity during the adiabatic expansion step in various thermodynamic cycles (like Organic Rankine cycle, Rankine cycle, etc.). Working fluids can be classified by using the appearance of droplets in the vapour during the expansion step. Quality χ {displaystyle chi } can be calculated by dividing the mass of the vapour by the mass of the total mixture: where m {displaystyle m} indicates mass. Another definition used by chemical engineers defines quality (q) of a fluid as the fraction that is saturated liquid. By this definition, a saturated vapour has q = 1. A saturated liquid has q = 0.