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Modelling of dynamics and stratification effects in pellet boilers
Dalarna University, School of Technology and Business Studies, Energy Technology.
Dalarna University, School of Technology and Business Studies, Energy Technology.ORCID iD: 0000-0002-4308-3980
Dalarna University, School of Technology and Business Studies, Energy Technology.
2019 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 134, p. 769-782Article in journal (Refereed) Published
Abstract [en]

Optimizing solar and pellet heating systems can be performed by system simulations in TRNSYS. However; this requires detailed boiler models that can properly model the thermal behaviour of the boilers, such as stratification and thermal response. This study uses a combination of existing models for modelling of the pellet burner part (TRNSYS Type 210) and the water volume (TRNSYS Type 340). This approach addresses the thermal dynamics and internal stratification more accurately than other available models. The objectives of this work are to develop a method for parameter identification for the model and to validate this method and the model itself. Sets of parameters are identified for two pellet boilers and one pellet stove with a water jacket (extended room heater) and the model is validated with a realistic dynamic operation sequence. The results show that modelling of stratification is essential in order to model the true behaviour of residential boilers. The test sequences used were adequate to parameterise the models and to provide the desired accuracy, except regarding the heat losses to room air. The model shows good accuracy for a stove and one boiler, but slightly worse performance for the other boiler regarding dynamics and modelling of the stratification.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 134, p. 769-782
Keywords [en]
System simulation; Modelling; Validation; Pellet boiler; Pellet stove
National Category
Energy Engineering
Research subject
Energy, Forests and Built Environments, SWX-Energi, Integrerade system för sol och biobränsle
Identifiers
URN: urn:nbn:se:du-28900DOI: 10.1016/j.renene.2018.11.052ISI: 000456760900067Scopus ID: 2-s2.0-85057272860OAI: oai:DiVA.org:du-28900DiVA, id: diva2:1263237
Available from: 2018-11-14 Created: 2018-11-14 Last updated: 2019-02-14Bibliographically approved

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The full text will be freely available from 2021-01-01 15:49
Available from 2021-01-01 15:49

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Persson, TomasWin, Kaung MyatBales, Chris

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • chicago-author-date
  • chicago-note-bibliography
  • Other style
More styles
Language
  • de-DE
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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