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BUILDING AND SIMULATING DYNAMIC MODELS OF DISTRICT HEATING NETWORKS WITH MODELICA: Using Matlab to process data and automate modelling and simulation
Mälardalen University, School of Business, Society and Engineering.
Mälardalen University, School of Business, Society and Engineering.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 300 HE creditsStudent thesis
Abstract [en]

District heating systems are common in Nordic countries today and accounts for a great portion of the heat demand. In Sweden, total district heating end use in the last years has been around 50 TWh and district heating accounts for roughly 50 % of the total heat demand. Suppliers of district heating must balance demand and supply, often in large and complex networks. Heat propagation can be in the range of hours and it is not known in detail how the heat will propagate during transient conditions. A dynamic model has been developed in OpenModelica and a method for modeling, handling data, simulating and visualizing the results of a district heating network was developed using Matlab as core. Data from Mälarenergi AB, a district heating producer and grid operator, was used for validation of the model. Validation shows that the model works well in predicting heat propagation and temperature distribution in the network and that the model can be scaled up to a large number of heat exchangers and pipes. The model is robust and can handle bi-directional and reversing flows in complex ring structures. It was concluded that OpenModelica together with Matlab is a good combination for creating models of district heating networks, as a high degree of standardization and automation can be achieved. This, together with visualization of the heat propagation, makes it useful for the understanding of the district heating network during transient conditions.

Place, publisher, year, edition, pages
2017. , 52 p.
Keyword [en]
Heat losses, flow reversal, heat propagation, visualization, CAD, components, object-oriented, bi-directional
Keyword [sv]
Värmeförluster, reversibelt flöde, värmeutbredning, visualisering, komponenter, objekt-orienterat, riktningsoberoende
National Category
Energy Systems Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-36107OAI: oai:DiVA.org:mdh-36107DiVA: diva2:1124448
External cooperation
Mälarenergi AB; Sigholm Konsult AB
Subject / course
Energy Engineering
Presentation
2017-06-01, R2-025, MDH, Högskoleplan 1, 721 23, Västerås, 08:50 (English)
Supervisors
Examiners
Projects
Smarta Flöden
Available from: 2017-08-10 Created: 2017-07-13 Last updated: 2017-08-10Bibliographically approved

Open Access in DiVA

fulltext(2287 kB)12 downloads
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bdc3661a3538c84652add903454301bc42b68872f619fdd145b1bfb101cbf65d6ca12ea5ce615cf997884e2da773ce5ecb0346f3861ed3ba9d18dae9e47c1572
Type fulltextMimetype application/pdf

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf