Article (Scientific journals)
Experimental validation of heat transport modelling in district heating networks.
Sartor, Kevin; Dewallef, Pierre
2017In Energy, 137, p. 961-968
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Keywords :
DHN; Experimental validation; Plug flow; Pipe; Dynamic simulation; Heat transport; District heating network
Abstract :
[en] District heating networks (DHN) are generally considered as a convenient, economic and environmental-friendly way to supply heat to a large amount of buildings. Some modelling methods are required to consider the dynamic behaviour of district heating networks to design them correctly, spare the investment costs and limit the heat losses related to the use of a too high operating temperatures. For the same reasons, the DHN control or retrofit of installations also requires the assessment of the DHN dynamic behaviour. To achieve this, the heat transport in DHN, which is one of the key issues in the behaviour of a whole centralized heating system, has to be correctly modelled. Previous work evidenced current limitations of one dimensional finite volume method to model heat transport in pipes and proposed an alternative method considering the thermal losses and the inertia of the pipes. The present contribution intends to experimentally validate this model on a test rig available at the Thermodynamics laboratory of the University of Liège (ULg, Belgium) and on an existing district heating network. For both experimental facilities, the current model shows good agreement between the experimental data and the simulation results for a large range of water velocities. Moreover, it is shown that the thermal inertia of the pipe has a significant influence on the outlet pipe temperature profile.
Disciplines :
Energy
Author, co-author :
Sartor, Kevin ;  Université de Liège > Département d'aérospatiale et mécanique > Systèmes de conversion d'énergie pour un dévelop.durable
Dewallef, Pierre ;  Université de Liège > Département d'aérospatiale et mécanique > Systèmes de conversion d'énergie pour un dévelop.durable
Language :
English
Title :
Experimental validation of heat transport modelling in district heating networks.
Publication date :
15 October 2017
Journal title :
Energy
ISSN :
0360-5442
eISSN :
1873-6785
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
Volume :
137
Pages :
961-968
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 March 2017

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