[Pinch Analysis] Multiple Pinch Points

Is it possible to have multiple pinch points in a process under pinch analysis. I am trying to create a pinch analysis model in Aspen Energy Analyzer. In my process, i am getting two pinch points.

 

Is it possible? If yes, then what is the significance?

 

I tried googling or finding it in old pinch analysis literature but couldnt find answer to this anywhere.

 

Any pinch analysis experts can guide me please!

simply decided to choose one of the points....

 

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Edited by gegio1960, 11 September 2019 - 10:45 PM.

So,
My process is showing pinch points as

368 / 343
and
65 / 40

Then you mean to say that i can just selwct 368 / 343 as the pinch point and ignore 65/40 point??

the pinch point is defined by one temperature, where the 2 (shifted) composite curves touch each other: on that you apply the DTmin

you're giving 2 couples of points, so the situation is not clear.

maybe your pinch points are at 65 and 368°C and you've applied 25°C of DTmin

in this case, in my opinion, you can identify 368°C as the pinch point of your project (a Crude Distillation Unit, I suppose).

good luck!

Edited by gegio1960, 18 September 2019 - 02:01 AM.

UPDATE:

 

Posting late update. I checked the GCC and found the curve intersecting Y axis at 368/343 temperature. So I ignored 65/40 point and concluded the study.

 

Thanks gegio1960 for the replies!

You have selected the right option. The hotter pinch point is the process pinch, and I guess the colder pinch point is a utility pinch point.
For anyone else reading this, there can only be one process pinch point.

Pavanayi