Jump to content

Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

Hysys Error

This topic has been archived. This means that you cannot reply to this topic.
No replies to this topic
Share this topic:
| More

#1 lokesh_09


    Veteran Member

  • Members
  • 44 posts

Posted 22 October 2009 - 01:42 AM


Could anyone can explain me the hysys error "FATAL ERROR -ZERO DIAGONAL IN COLUMN MATRIX".

I have also attached hysys error file.

Attached Files

#2 Srikrishna Chaitanya

Srikrishna Chaitanya

    Gold Member

  • Members
  • 56 posts

Posted 22 October 2009 - 04:43 AM

Dear Lokesh ,

To converge a distillation column we have to solve many equations ,one by one all tray equations ,Just think in terms of Mathematics , for your inputs there is no solution with hysys distillation equations , you might be giving some invalid inputs check them , till you get a solution

#3 Padmakar Katre

Padmakar Katre

    Gold Member

  • ChE Plus Subscriber
  • 987 posts

Posted 06 November 2009 - 09:41 AM

Try converging column with different specification. As with the current active specs are overriding each other or you cann't achieve the desired spec values change their values i.e. loosen the active spec values.

#4 ncarrascob


    Junior Member

  • Members
  • 16 posts

Posted 17 February 2011 - 05:05 PM

In this case: hysys takes all the equations and form an equation system which solved matrixed with a try and error methodology or any other convergence algorithm (like Jacobi or Gauss-Seidel algorithms). Sometimes, for some specifications that you give to hysys to solve the problem and when hysys need to determine the inverse matrix, it find that the determinant is zero, so it gives you the message: "FATAL ERROR -ZERO DIAGONAL IN COLUMN MATRIX"

Similar Topics