Dear R. Paul Singh, I found your video to be very helpful for understanding the mass and energy balances that make up the Multiple Effect Evaporator. However, I have a specific question related to the Evaporator that is unrelated to the video topic. I was curious on what would be an acceptable feed in a Multiple Effect Evaporator system. For example, would a toluene phase feed (which has a higher boiling point than water) work in this system, or would issues arise due to the difference in boiling points? And, if so, would you have any suggestions to remedy that? I appreciate any help that you may provide. And if this question is beyond the scope of the video, I apologize. Thanks, Travis
I think the total mass balance is not correct since mv1 and mv2 are not separate outlet and are inlet of next unit. So it should not be considered in the total.
Thank you for your comment. But, the mass balance as shown in the tutorial is correct! Note that vapors produced from the first effect (with mass mv1), condense inside the heat exchanger in the second effect and the condensate (of same mass as the vapors) is discharged as shown. Similarly, vapors produced from the second effect (with mass mv2), condense inside the heat exchanger in the third effect and the condensate is discharged. And, mv3 represents the mass of vapors discharged from the third effect. In each effect, an indirect heat exchanger is used where the vapors condense inside the exchanger tubes, only the heat gets transferred to the fluid in the chamber, and the condensate is discharged, as shown in the figure.
