Approach temperature

[thubelihle]

I have supply water at 90F to use source of cooling and l want it to heated to 120 to avoid fouling. I want to use a temperature approach of 10F. So do l use 90+ 10= 100F or 120 + 10 = 130 to get the condenser pressure. Thanks

[jasper]

Quoting Ross Taylor:

The temperature and pressure of the coolant in the condenser plays no role in setting the pressure of the condenser (which, I assume, is attached to a column). These things are completely independent. If ChemSep is the column model then you do not need to know (and cannot, in any case, provide) the pressure of the coolant.

[thubelihle]

Gooday,
I meant the pressure of the condenser, so as to determine the pressure of the column based on Tdew of the distillate

[jasper]

If you are using 120 F water to cool with a 10 F approach temperature, you should probably have your condensor at 130 F.