A 230m3 rigid rank is filled will saturated liquidvapor mixt

A 230-m^3 rigid rank is filled will saturated liquid-vapor mixture of water at 120 degree C. If 25% of the mass is liquid and the 75% of the mass is vapor, determine the total mass(kg) in the tank.

Solution

From steam chart the saturated temp of 120⁰C for vapor liquid is achieved at 2 bar.

Specific volume is 0.8856 m³/kg

The 230m³ tank will have 259.7 kg(230/0.8856) of liquid+vapour molecules

Mass of liquid=25% of 259.7 i.e 65 kg

Mass of Vapour=75% of 259.7 i.e 194.7 kg