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Discussion

From the case study that was done on study Al-Khafji plant, it produces a 184
thousand kg/hr from 2.5 Million kg/hr enters the plant and consume 23 thousand kg
steam to produce it and with 20 stage
In our project we produce 14 thousand kg/hr from 1Milion kg/hr enters the flush
vessels and without consuming any quantity of power and with just 4 stages.
We discuss increasing the pressure of water that enters in flash vessels from 1.5 bar
to 3 bar for example we find that the mass flow rate vapor in the first stage is
900kg/hr and when the pressure 1.5 the mass flow vapor is 833 kg/hr. and from this
result, we deduced that increase pressure of the water enters the flush tank does not
have a Satisfactory effect.

st
kg/hr steam 1 stage

900
880
860
840
820
800

780
1.5 bar 3 bar

Fig.4.6 effect of increase the pressure of the first stage RSCC

And we discuss to increase the water temperature that enters the first flush vessel
o
o
from 110 c to 120 c ,we find the mass flow rate vapor in the first flush vessel
o
increase to 19 thousand kg/hr and when the temperature is 110 c the mass flow rate
vapor is 833 kg/hr but the heat rate increase from 80 MW to 90 MW that will increase
the number of solar collectors and the area for the solar collector that will increase
o
the cost in a comparison with 110 c enter.

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