If 1 kg mixture of steam contains 0.8 kg of dry vapor and 0.2 kg of moisture, then the dryness fraction of the steam is

Explanation

Concept : L = eq ​n L L = eq ​ = 1 L L Dryness Fraction x = ( ) ​ Total mass of wet steam Mass of dry vapor in the wet steam Calculation: Given: Mass of dry vapor = 0.8 kg, Mass of moisture = 0.2 kg The total mass of wet steam = 1 kg Dryness fraction is: Important Points Dryness fraction defines the quality of wet steam. For the saturated liquid, the value of dryness fraction is zero . For the dry saturated steam, its value is unity . It also can be defined as the part of the latent heat absorbed by the steam at a given pressure to reach the existing condition.