No, this doesn't work but thanks for the suggestion. The flash needs 2 of the 4 variables specified, T, P, vapour fraction, duty. Duty is presumably the heat of vaporization. I want to fix T and calculate P and the vapour composition. I have to specify duty but have no idea what this is. The...
I'd like to re-open this query with an update. I have a good estimate of the total pressure including accounting for the volume change. My problem now is to calculate the vapour phase composition.
I'm using Aspen+ software. I can't run this as a tank or CSTR because the dyanmics of the process...
Hello!
I would like to install a fibre optic cable through a solid masonry wall dividing a process plant and the control room.
It's a temporary install and obvviously the cable is fragile.
I'm looking for advice and products to handle the interface. We've heard of expanding gas-filled bricks...
Thanks for your replies. I've tried to keep the description simple because of commercial sensitivies, there is more going on in the tank but I'd like to keep that part off line.
The tank is isothermal. It is not lagged but there is a temperature control system associated with it. The headspace...
Hello
I hope someone can help me with this. It's a simple question but I'm not from a classical Chem. Eng. background so could do with a pointer. If you have a sealed tank of volume V and you fill it to some proportion x (0-1) at a rate Q L/min, how can I determine the final pressure in the...
Hello all. I need to write a technical appendix for a business case on a multi-million dollar investment for a new plant design. It is obviously commercially sensitive so I can't give any further data/info.
I'm not after a definitive guide but can you offer some insight into what the content...
Thanks very much for your responses guys. I'm going with simply x2 on the grounds of cost/area as an initial crude estimate.
@MJC - it is a homework problem!
I had a think about it and here's what I came to -
If the duty doubles, the area doubles (?)
If the length of a shell/tube exchanger doubles, the area doubles
So assuming cost/area is a sensible way to estimate, the cost will just be x2 i.e. $20k
Right?!
Hi all
I'm new so I hope you'll be able to help out and don't find this question beneath contempt!
I'm a chemist retraining in chemical process engineering and I'm faced with a very abstract maths problem. Here goes:
"The cost of a heat exchanger is estimated to be $10,000. Estimate the cost of...
