3 replies to this topic

[CHEMSTRONG]

Hi,

 

I have HC gas composition in stream no 1 and Water in Stream no2 and we are mixing these two streams to get final stream No3 . I want to maintain relative humidity of 80 percent in stream no3 using ASPEN PLUS software herein ?

 

I am not able to find relative humidity as a parameter in ASPEN PLUS here ?

 

Thanks.

 

Best Regards,

CHEMSTRONG

[Pilesar]

Why not just calculate the amount of water needed to saturate the hydrocarbon then multiply that amount by 0.8?

[CHEMSTRONG]

Ok, do you mean doing this procedure, it will do exactly same thing in ASPEN PLUS ?

[PaoloPemi]

follow Pilesar's advice,
by definition relative humidity is the amount of water in vapor phase expressed as a percentage of the maximum amount of water vapor the mixture can hold at the same t, p conditions.
I am not familiar with Aspen (I have Prode Properties which allows to extract individual component's fractions and then calculate these values in Excel or Python with some programming language) but you can (for example) calculate t,p,w at saturation (as reference value) and then iterate until the requested condition is met...