Calculation of the cooling water consumption for the condenser in evaporator design!
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Hello, Sea Friends! Has anyone who has worked on evaporator design come to discuss this? When designing an evaporator, is it also necessary to properly design the condenser as well? Or should it be done separately or only with conditions? I have started to work on the design of evaporators, and I feel that designing condensers is even more difficult than designing evaporators. Why do I have this feeling? Also, if the steam condensate and the evaporation condensate come out of the condenser together, does this make the heat calculation more complex, or is it still calculated based on saturated steam at a single constant pressure?
If you are using an MVR evaporator, then a condenser is not necessary; otherwise, the secondary vapor from the last effect should be condensed in a condenser. Of course, there are also two possible configurations for this. One type is an indirect condenser (heat-exchanger type condenser) + vacuum pumping system, and the other is a direct-contact condenser (atmospheric condenser) + vacuum system. The design of the condenser and vacuum system is very important, as it serves as the driving force for the evaporation system. It’s normal to find it a bit difficult at first; once you work on a few projects, you’ll get the hang of it. I usually calculate things separately: I set the final evaporation pressure, perform a thermodynamic calculation for the evaporator to determine the final evaporation volume, and then use that value to design the vacuum system. For vacuum systems, one can turn to professional manufacturers; if building one oneself, the evaporation chapter in the Chemical Engineering Handbook can be used as a reference.