Change search
CiteExportLink to record
Permanent link

Direct link
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
Determination of essential parameters influencing service life time of polyurethane insulation in district heating pipes
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.ORCID iD: 0000-0001-6793-2783
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.
2017 (English)In: Energy Procedia, Elsevier Ltd , 2017, p. 320-323Conference paper, Published paper (Refereed)
Abstract [en]

Pre-insulated district heating pipes (DHP) have been in use during the last forty years. Many improvements and development have been done in the system. However, life-time prediction is still an uncertain issue. This paper is a part of a bigger project with the objective to determine mechanisms related to the deterioration of the mechanical and insulation properties of pre-insulated heating pipes as a result of ageing. The focus in this project is on degradation mechanisms of the PUR material at high temperatures. In this paper some results of the two types of exposure are presented. The first type comprises a condition where the new pipes are subjected to accelerated ageing at three different temperatures. The second type comprises condition, when the PUR material itself is aged in different atmospheres in order to identify different degradation mechanisms. The chosen ageing temperatures in the first condition were 130°C, (close to the supply temperature), 150°C and 170°C, (accelerated ageing temperature in EN 253 [1]). Changes in thermal insulation and the adhesion force between the PUR and the steel pipe were evaluated using the transient plane source (TPS) technique and the SP plug method respectively. The results of ageing show that the degradation of PUR is a multi-stage process composed of a rapid change in properties followed by a plateau phase which changes later to a gradual deterioration of the properties. The results of the PUR material exposure at 150°C in air and in nitrogen showed significant differences in the degradation characteristics between the two environments as were revealed by DSC and FTIR methods. © 2017 The Authors. Published by Elsevier Ltd.

Place, publisher, year, edition, pages
Elsevier Ltd , 2017. p. 320-323
Keywords [en]
Accelerated ageing, District heating pipe, Life time prediction, Polyurethane insulation, PUR degradation, Degradation, Deterioration, District heating, Heating, Insulation, Polyurethanes, Degradation characteristics, Degradation mechanism, Insulation property, Lifetime prediction, Supply temperatures, Transient plane source techniques, Thermal insulation
National Category
Other Civil Engineering
Identifiers
URN: urn:nbn:se:ri:diva-38110DOI: 10.1016/j.egypro.2017.05.078Scopus ID: 2-s2.0-85028586584OAI: oai:DiVA.org:ri-38110DiVA, id: diva2:1294746
Conference
15th International Symposium on District Heating and Cooling, DHC15-2016, 4 September 2016 through 7 September 2016
Available from: 2019-03-08 Created: 2019-03-08 Last updated: 2019-06-18Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Vega, Alberto

Search in DiVA

By author/editor
Vega, Alberto
By organisation
Energy and Circular Economy
Other Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
CiteExportLink to record
Permanent link

Direct link
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
v. 2.35.7