Thees Wilken

Hi, is there a way to simulate the heating of a parafine fraction in a tank using steam? So as an additional part of a simulaiton i want to include the dynamic heating of a simple tank filled with paraffine (no material streams are flowing while heating). The tank model itself only has the liquid volume as parameter, but there is no option for heating. Any ideas how to realise it in the most simple way? At first i used the "Heater" model combined with a recycle block, but of corse it can only calculate...

I would also enjoy any tipps regarding the thermodynamic property package and other settings if someone has some experience with those water-ammonia systems.

(T = 25°C, p = 1,01325 bar)

Hi, im trying to simulate a gas scrubbing system with ammonia-water mixture (25wt%). But the mass density of the mixture is given by DWSIM wrong. It is calculated via Rackett or taken from experimental data. If I select the liquid phase density calculation method "Rackett", the value is totally wrong. So i guess there are experimental data used, because the value is different if the option "Rackett + Experimental Data" is used. Where can i find those data (or do they mean the single compound data?)...

Thanks for the fast help!

Thanks for the fast answer. So there are fixed coefficients for the calculation of the equivalent length?

Hi, could anyone tell me what DWSIM actually calculates, if for example a ball valve is added as a section in a tube? Only the rugosity can be fixed there, so is there a fixed Kvs or zeta value in the beckground that is used for the calculation of the pressure drop? Thees