[technologist]

Simply take latent heats of methanol & water and calculate condensing load - Convert it to TR of refrigeration - Add process losses ~20% in 0°C chilling system. Find out steam requirement by thumb rule of 10 Kg/TR & U will get the no.

I dont know what is flash condensation.

[coolsuman]

hai technologist,
flash condensation is nothing but flash separation, here it was condensing so i wrote flash condensation. this work i had done in aspen plus.
 condensing load means just calculation of sensible entalphies right? if not please elucidate me. thanking you for spending your valuable time.

[technologist]

Condensing load means latent heat of condensation which is much larger than sensible heat.

I could not understand flash condensation.

U r getting vapors of methanol & water from your pervaporation unit. So how can U flash vapors. Is it by pressure change or temp change.

[coolsuman]

hai technologist,
ok, its not flash, it is fractional condensation, by decreasing from 280k - 278 k , by that some of the water and methanol condenses as liquid. that liquid had distillation done and it was made to 98 wt%