Petroleum Community Forum - Aspen Energy Analyzer

Originally Posted by TorOlavHE

Hi!

Originally Posted by TorOlavHE

Is it possible to do a complete pinch analysis and generate heat exchanger network proposals automatically with Aspen Energy Analyzer? I have tried "Activated Energy Analysis" as described in the Jump Start Guide (please see attachments here) on a simplified version of a process (picture 1). However, the program fails to generate any potential design changes.

I have also tried to couple streams manually, but still with poor results (picture 2).

Uploading the HYSYS files into Aspen Energy Analyzer as described in the guide made the program crash. If I press Details in the Energy Analysis window in HYSYS, however, the data seems to upload into Aspen EA. Anyhow, Aspen EA still fails to generate any design changes when following the instructions in the guide.

How will the program handle phase changes? Do you have to split streams that undergo evaporation into three separate streams – one for the heating of the liquid, one for the boiling and one for the superheating part? If so, how do you specify an infinite MCp value at the same time as the enthalpy change is equal to the enthalpy of vaporization?

Originally Posted by tron322xer2010

softwares do magic.

Originally Posted by tron322xer2010

It's just a tool that makes it easy to calculate.
Hit the books and read the manuals
Nobody will do your work for you

Originally Posted by TorOlavHE

I know how to do it manually, and I have also read the manuals. I am simply wondering if this program can do it automatically, and what I am doing wrong, since I think I have followed the manual accurately....

Originally Posted by aseptman

It does quite good. Try and have patience with it

Originally Posted by tron322xer2010

Your questions are:

Originally Posted by tron322xer2010

1. it possible to do a complete pinch analysis and generate heat exchanger network Proposals Automatically With Aspen Energy Analyzer?
Answer: YES
2. How will the program handle phase Changes? Do you have to undergo evaporation That streams split into three separate streams - one for the heating of the liquid, the boiling for one and one for the superheating part? If so, how do you specify an infinite MCp value at the same time as the enthalpy change is equal to the enthalpy of vaporization?
This question is illogical and makes no sense.
Restate your question

Originally Posted by TorOlavHE

I realized how to automatically generate HEN designs now. The Jump Start Guide only explained the retrofit method...

Originally Posted by TorOlavHE

My second question can be described by this picture:

Attachment 7788

If Aspen EA is using the A-D average approach in figure 3.9 when calculating, that might not be feasible, as seen in figure 3.10. So if this is the case, how do you specify that something is boiling/condensing when heat exchanging?

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