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Evaluation of approaches for modeling temperature wave propagation in district heating pipelines

Gabrielaitiene, Irina LU ; Bohm, Benny and Sundén, Bengt LU (2008) In Heat Transfer Engineering 29(1). p.45-56
Abstract
The limitations of a pseudo-transient approach for modeling temperature wave propagation in district heating pipes were investigated by comparing numerical predictions with experimental data. The performance of two approaches, namely a pseudo-transient approach implemented in the finite element code ANSYS and a node method, was examined for a low turbulent Reynolds number regime and small velocity fluctuations. Both approaches are found to have limitations in predicting the temperature response time and predicting the peak values of the temperature wave, which is further hampered by the fact that the fluid is represented as an ideal fluid. The approaches failed to adequately predict the temperature wave propagation in the case of rapid... (More)
The limitations of a pseudo-transient approach for modeling temperature wave propagation in district heating pipes were investigated by comparing numerical predictions with experimental data. The performance of two approaches, namely a pseudo-transient approach implemented in the finite element code ANSYS and a node method, was examined for a low turbulent Reynolds number regime and small velocity fluctuations. Both approaches are found to have limitations in predicting the temperature response time and predicting the peak values of the temperature wave, which is further hampered by the fact that the fluid is represented as an ideal fluid. The approaches failed to adequately predict the temperature wave propagation in the case of rapid inlet temperature changes. The overall conclusion from this case study was that in order to improve the prediction of the transient temperature, attention has to be given to the detailed modeling of the turbulent flow characteristics. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Heat Transfer Engineering
volume
29
issue
1
pages
45 - 56
publisher
Taylor & Francis
external identifiers
  • wos:000252456000004
  • scopus:38349169892
ISSN
1521-0537
DOI
10.1080/01457630701677130
language
English
LU publication?
yes
id
7d97094b-6782-4bc6-a9ed-3ec194619f18 (old id 1199898)
date added to LUP
2008-09-11 13:18:49
date last changed
2017-10-29 03:24:19
@article{7d97094b-6782-4bc6-a9ed-3ec194619f18,
  abstract     = {The limitations of a pseudo-transient approach for modeling temperature wave propagation in district heating pipes were investigated by comparing numerical predictions with experimental data. The performance of two approaches, namely a pseudo-transient approach implemented in the finite element code ANSYS and a node method, was examined for a low turbulent Reynolds number regime and small velocity fluctuations. Both approaches are found to have limitations in predicting the temperature response time and predicting the peak values of the temperature wave, which is further hampered by the fact that the fluid is represented as an ideal fluid. The approaches failed to adequately predict the temperature wave propagation in the case of rapid inlet temperature changes. The overall conclusion from this case study was that in order to improve the prediction of the transient temperature, attention has to be given to the detailed modeling of the turbulent flow characteristics.},
  author       = {Gabrielaitiene, Irina and Bohm, Benny and Sundén, Bengt},
  issn         = {1521-0537},
  language     = {eng},
  number       = {1},
  pages        = {45--56},
  publisher    = {Taylor & Francis},
  series       = {Heat Transfer Engineering},
  title        = {Evaluation of approaches for modeling temperature wave propagation in district heating pipelines},
  url          = {http://dx.doi.org/10.1080/01457630701677130},
  volume       = {29},
  year         = {2008},
}