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Expansion of Sewer, Water and District Heating Networks in Cold Climate Regions: an Integrated Sustainability Assessment
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0002-8804-8417
RISE Built Environment, Research Institutes of Sweden, Stockholm.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0003-1725-6478
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0001-9541-3542
2018 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 10, no 10, article id 3743Article in journal (Refereed) Published
Abstract [en]

This study presents an integrated sustainability assessment of technical alternatives for water and heating services provision in suburban areas affected by a cold climate. Each alternative combines a drinking water supply, sewerage (gravity or low-pressure), pipe freeze protection (deep burial or shallow burial with heat tracing) and heating solution (district heating or geothermal heat pumps). An innovative freeze protection option was considered, in which low-temperature district heating (LTDH) is used to heat trace shallow sewer and water pipes. First, the performance of each alternative regarding seven sustainability criteria was evaluated on a projected residential area in Sweden using a systems analysis approach. A multi-criteria method was then applied to propose a sustainability ranking of the alternatives based on a set of weights obtained from local stakeholders. The alternative with a deep buried gravity sewer and geothermal heat pumps was found to have the highest sustainability score in the case study. In the sensitivity analysis, the integrated trench solution with a gravity sewer, innovative heat tracing and LTDH was found to potentially top the sustainability ranking if geothermal energy was used as the district heating source, or if the weight of the cost criterion increased from 24% to 64%. The study highlights the need for integrated decision-making between different utility providers as an integrated solution can represent sustainability gains.

Place, publisher, year, edition, pages
Basel, Switzerland: MDPI, 2018. Vol. 10, no 10, article id 3743
Keywords [en]
low pressure sewer, low temperature district heating, freeze protection, life cycle assessment, multi-criteria
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-71253DOI: 10.3390/su10103743ISI: 000448559400385Scopus ID: 2-s2.0-85055094129OAI: oai:DiVA.org:ltu-71253DiVA, id: diva2:1256905
Note

Validerad;2018;Nivå 2;2018-10-30 (svasva)

Available from: 2018-10-18 Created: 2018-10-18 Last updated: 2019-04-24Bibliographically approved
In thesis
1. Shallow co-location of water, sewer and district heating pipes: Applicability in cold climate regions
Open this publication in new window or tab >>Shallow co-location of water, sewer and district heating pipes: Applicability in cold climate regions
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Alternative title[sv]
Grund samförläggning av VA- och fjärrvärmeledningar ovanför tjäldjupet : möjlighet i kalla regioner?
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-73137 (URN)978-91-7790-326-0 (ISBN)978-91-7790-327-7 (ISBN)
Presentation
2019-05-10, C305, LTU, Luleå, 10:00 (English)
Opponent
Supervisors
Available from: 2019-03-08 Created: 2019-03-08 Last updated: 2019-05-03Bibliographically approved

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Pericault, YouenViklander, MariaHedström, Annelie

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