metroscope-modeling-library
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Metroscope-dev
[BUG] TIT is always higher than expected
What is your problem ?
The Turbine Inlet Temperature is always higher than the customer values. A possible error in the combustion chamber model may explain this gap. At the moment, the error is corrected by the calibration of the turbine.
What should happen ?
It should be approximatively 100°C lower.
Do you have anything to add ?
What is your setup ?
- Version of
MML: 3.8.1
@alexandreh-met you had solved this issue no ? Can you create a PR to merge your fix ?
@pierre-eliep-met actually I thought that the issue was solved but it is still ongoing ^^
Ok, then you can document here what you did, what worked and what didn’t, it is a good practice in case anybody tries to work on the topic, and to avoid loosing information
State of progress
The first lead was that customer values (calculated using a GE method) were obtain assuming different reference conditions than Dymola's for the enthalpy calculation, resulting in a gap in TIT. After investigation, it appears that the customer and our combustion chamber model in Dymola are using the same method. It was proven with manual calculation of the enthalpy with GE's method in Dymola.
- There is still an unexplained gap on TIT between our modeling and the customer value.
It is likely that this gap comes from the current not-taking into account of the cooling bleeds flow extraction in our modelling, whereas the customer would take it into account.
One objective of the internship is to take into account quite accurately the cooling bleeds in the GT models. I am hoping the issue will be resolve with this further improvement