Flash Distillation Energy Balance

[@Highfiber123]

Excellent, succinct and very approachable

[@SofiaParra]

Thanks for the awesome video. Where did you get the Cp values?

[@syedmuhammadhassanmehdi1388]

Sofía Parra From literature we have Cp values table against temperature and pressure from Perry's Handbook for Chemical Engineers

[@SA-bt5qb]

THAT WAS REALLY HELPFUL, THANKS

[@allancheung7411]

Where did the 150oC come from, I believe you cut out some calculations there. Can you go through what numbers you used to calculate hL, hV, and hF?

[@ejimadam2022]

Temperature of the feed is 150oC=Tf.

[@allancheung7411]

Oh yeah I noticed that afterwards 5 years ago LOL but thanks anyways@@ejimadam2022!

[@victorotobor]

I tried to solve it and got as far as the material balance but I didn't know where to find VLE to proceed

[@ejimadam2022]

Did you use V/F=0.33 to calculate the molar flow rates of the Vapor and Liquid streams? If so I got 30,000mol/hr and 70,000mol/hr.

[@MrAndreaOtt]

I have a question! If the feed is at vapor state, how should the enthalpy balance be like? Assuming Tfeed as our reference, the molar enthalpy of the vapor phase of the i-species is calculated as cp,v,i*(Tflash-Tfeed), whereas the molar enthalpy of the liquid phase of the i-species should be calculated as cp,L,i *(Tnb-Tfeed)- deltaH,evap(Tnb)+ cp,V,i*(Tnb-Tflash). Tnb is the normal boiling point temperature and deltaH,evap is the evaporation heat at Tnb. Is it right? I am concerned about the order of the last term: which one is correct: cp,V,i*(Tnb-Tflash) or cp,V,i*(Tflash-Tnb)? Thanks in advance and sorry for bothering you

[@abbeykalio9037]

i'm guessing you used 25C as ref temp in calculating Hv. at what temperature is the latent heat? in that calculation?

[@junior75980]

+Tu mi You must use the temperature for all problem. Don't matter the reference, but have to be the same for te current problem.

[@houarialaylaz7666]

Please how to calculate pressure drum

[@yuzhe2917]

CN3132 xx