Tuesday, November 20, 2007
This post is for those use ASPENTECH HYSYS 2006 release...
New bug found in ASPENTECH HYSYS Dynamic Depressuring unit, [Fisher] Valve model...
Incident
The peak flow is higher when [Fisher] valve model under valve parameters in Dynamic depressuring Utility is selected.
Cause
There is a problem with the Fisher equation calculation in the 2006 dynamic tool. A disproportionate scale term in the equation has been used such that it causes wrong Cv and peak flow calculation.
Workaround
Workaround
There is no workaround for time being and will be fixed in 2006.5 version, expected to be released in Jan 2008.
SourceThis information has been informed by Kandan (nickname) and further advised by dyogal (nickname). I have finally got the confirmation from ASPENTECH via my personal account ( Incident no. 886087).
Updated on Oct 22, 2007
This bug only occurs in ASPENTECH HYSYS version 2006. They are fine in other vision such as 3.1, 3.2, 2004.1 and 2004.2.Updated on Oct 22, 2007
Further Reading :
- Another descrepancy found in API Std 521Jan 2007
- Controlled and Non-controlled Type Depressuring.
- How to apply valve equation in HYSYS Depressuring ?
- 6 elements & factors lead to high quality question
- Carefully assess information in the web
- 12 Features required for Shutdown Valve (SDV)
Labels: Depressurization, Design, HYSYS
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