Evolution of specific volume of wet saturated steam, Mechanical Engineering

Evolution of Specific volume of wet saturated steam -thermodynamics :

Specific volume of wet saturated steam (Vwet)

It is volume occupied by unit mass of wet saturated steam corresponding to given pressure of steam generation.

Sp. volume of wet saturated steam can be given by

Vwet  = volume occupied by 'x' kg dry saturated steam + volume occupied by (1 - x) kg. water, here,

x = dryness fraction of the wet saturated steam.

Let vg = specific volume of dry saturated steam in m3/kg corresponding to the given pressure of wet saturated steam.

v  = sp. volume of water in m3/kg corresponding to given pressure of wet saturated steam. Then,

Vwet = x.vg + (1 - x) vf   m3/kg.

As (1 - x) vf  is very small compared to x.vg , it is neglected.

[Average value of vf  = 0.001 m3/kg upto atmospheric pressure].

Thus,

Vwet = xvm3/kg.

 

Posted Date: 10/15/2012 6:27:48 AM | Location : United States







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