Abstract

This paper presents a method to determine the effective friction factor and overall heat transfer coefficient for a high pressure, natural gas pipeline during fully transient flow conditions. Time varying SCADA (Supervisory Control And Data Acquisition) measurements at the pipeline boundaries (i.e., inlet and outlet) provide boundary conditions for a transient flow model as well as additional information that is utilized to determine these parameters. The resulting friction factor and overall heat transfer coefficient minimize the least-squared difference between the additional SCADA measurements at the pipeline outlet and the corresponding values predicted from the transient flow model. This concept is referred to as parameter estimation. The transient flow model is based on a numerical solution of the one-dimensional, unsteady flow equations (i.e., continuity, momentum and energy) which are discretized using a highly accurate compact finite-difference scheme.</jats:p> <jats:p>The transient flow model and parameter estimation are incorporated into a computer program that is initially tested on a simple pipeline with steady flow conditions. Here, the predicted outlet pressure and temperature, using the estimated friction factor and overall heat transfer coefficient, exactly matches the corresponding prescribed values. Subsequently, a portion of the Foothills Pipe Line Ltd. transmission system in Alberta is considered using time varying SCADA flow measurements. The resulting outlet pressure and temperature from the transient flow model are in good agreement with SCADA measurements at this location.


Original document

The different versions of the original document can be found in:

http://dx.doi.org/10.1115/ipc1996-1929
http://dx.doi.org/10.1115/1.2830078
https://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2572886,
http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2572886,
https://academic.microsoft.com/#/detail/2533469967
http://offshoremechanics.asmedigitalcollection.asme.org/article.aspx?articleid=1453660,
https://academic.microsoft.com/#/detail/2068405200


DOIS: 10.1115/1.2830078 10.1115/ipc1996-1929

Back to Top

Document information

Published on 01/01/1999

Volume 1999, 1999
DOI: 10.1115/1.2830078
Licence: CC BY-NC-SA license

Document Score

0

Views 0
Recommendations 0

Share this document

claim authorship

Are you one of the authors of this document?