Alex thank you so much for your response and for the explanation.
I should have studied more physics in school, you just made me a really happy man
I forgot to mention in my previous post a "little detail", I'll be distilling with a single pass through a 4 plates column, so once the water leaves the condenser will go to the dephlegmator and that will Increase for sure temperature, but according to you calculations even if the final temp of water was 70C after leave the dephlegmator 600 liters/water x hour will be still ok, right?
Thanks!