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Effective Width: The Relative Demand for District Heating Pipe Lengths in City Areas
Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.ORCID iD: 0000-0001-9118-4375
Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.ORCID iD: 0000-0001-9069-0807
2010 (English)In: 12th International Symposium on District Heating and Cooling, Tallinn: Tallinn University of Technology , 2010, p. 128-131Conference paper, Published paper (Refereed)
Abstract [en]

One key concept when assessing network investment cost levels for district heating systems is the linear heat density. In contrast to a traditional way of expressing this quantity entirely on the basis of empirical data, a recently developed analytical approach has made it possible to estimate linear heat densities on the basis of demographic data categories. A vital complementing quantity in this analytical approach is the concept of effective width.

Effective width describes the relationship between a given land area and the length of the district heating pipe network within this area. When modelling distribution capital cost levels by use of land area values for plot ratio calculations, there is a potential bias of overestimating distribution capital cost levels in low dense park city areas (e < 0.3). Since these areas often include land area sections without any housing, avoiding overestimations of network investment costs demand some kind of corrective mechanism.

By use of calculated effective width values, a compensating effect at low plot ratio levels is achieved, and, hence, renders lower anticipated distribution capital cost levels in low dense park city areas.

Place, publisher, year, edition, pages
Tallinn: Tallinn University of Technology , 2010. p. 128-131
Keywords [en]
District heating, linear heat density, park areas, plot ratio, target area
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hh:diva-6014Scopus ID: 2-s2.0-79952642762ISBN: 978-9949-23-015-0 OAI: oai:DiVA.org:hh-6014DiVA, id: diva2:353596
Conference
12th International Symposium on District Heating and Cooling; Tallinn, Estonia from September 5th to September 7th, 2010
Available from: 2010-09-29 Created: 2010-09-28 Last updated: 2015-03-12Bibliographically approved
In thesis
1. Realise the Potential!: Cost Effective and Energy Efficient District Heating in European Urban Areas
Open this publication in new window or tab >>Realise the Potential!: Cost Effective and Energy Efficient District Heating in European Urban Areas
2011 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The Member States of EU27 need to accelerate the integration of energy efficient technology solutions to reach the 20% energy efficiency target set for 2020. At current pace, projections indicate that only half of expected primary energy reductions will be reached. To meet the energy demands of growing populations and a vibrant economy, while simultaneously reducing primary energy supplies, the European continent faces a new kind of challenge never previously encountered. The identification and application of feasible, competitive, and comprehensive solutions to this problem are of highest priority if the remaining gap is to be closed in time. How is this multi-dimensional and complex dilemma to be dissolved? In this work, expanded use of district heating technology is conceived as a possible solution to substantially reduce future primary energy demands in Europe. By extended recovery and utilisation of vast volumes of currently disregarded excess heat from energy and industry sector fuel transformation processes, district heating systems and combined generation of heat and power can improve the general efficiency of the European energy balance. To investigate the possible range of this solution, this thesis introduces a set of methodologies, theoretical concepts, and model tools, by which a plausible future excess heat utilisation potential, by means of district heat deliveries to residential and service sectors, is estimated. At current conditions and compared to current levels, this potential correspond to a threefold expansion possibility for directly feasible district heating systems in European urban areas and a fourfold increase of European excess heat utilisation.

Place, publisher, year, edition, pages
Gothenburg: Chalmers University of Technology, 2011. p. 57
Keywords
District heating, energy efficiency, distribution capital cost, heat density, plot ratio, excess heat recovery, sequential energy supply, heat utilisation, effective width
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hh:diva-17281 (URN)
Presentation
2011-12-21, EA-salen, Hörsalsvägen 11, Gothenburg, 10:00 (English)
Opponent
Supervisors
Available from: 2012-02-24 Created: 2012-02-23 Last updated: 2014-03-05Bibliographically approved
2. District heating in future Europe: Modelling expansion potentials and mapping heat synergy regions
Open this publication in new window or tab >>District heating in future Europe: Modelling expansion potentials and mapping heat synergy regions
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents a set of methodologies and approaches to investigate and determine the extent by which district heating can contribute to improved energy system efficiency and reduced carbon dioxide emissions in future Europe. The main motivation for suggesting large-scale implementation of district heating as a structural energy efficiency measure to obtain these objectives originates essentially in the predicament that a majority of European buildings today remain highly dependent on fossil fuels to provide energy needed for space heating and hot water preparation. In parallel, vast annual volumes of rejected excess heat from European power plants and industries are mainly neglected and lost unutilised to the ambient surroundings, why extended recovery and utilisation of such secondary energy assets realistically could replace significant shares of current inefficient supplies by fuel substitution. A prerequisite, however, for the viability of this logical prospect, is that infrastructures by which to facilitate excess heat recovery and subsequent network heat distribution are in place, which by no means is the average case in contemporary Europe.

Hereby, the investigation is structured orderly by first establishing whether district heating can be a competitive alternative on current urban European heat markets, facilitated by a distribution capital cost model, where after the energy systemic benefits of expanding district heating are characterised and used to estimate a plausible expansion potential based on comparative analysis. Next, energy system modelling of continental EU27 by the year 2050, with district heating expanded in alignment with this potential, is performed to assess the total energy system cost benefits relative an alternative scenario focusing mainly on individual energy efficiency measures. Finally, spatial mapping to identify current primary target regions from which large-scale implementation of district heating could emanate is conceived and performed by use of a geographical information systems interface.

The findings are generally supportive of a realisation of the objectives, mainly so by establishing a three-fold directly feasible expansion potential for district heating in city areas, but recognise also several additional, mainly non-technical, issues and challenges necessary to address in a successful transition to more energy efficient supply structures in future Europe.

Place, publisher, year, edition, pages
Göteborg: Chalmers University of Technology, 2015. p. 90
Series
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, ISSN 0346-718X ; 3769
Keywords
district heating, energy efficiency, distribution capital cost, heat demand density, plot ratio, excess heat recovery, sequential energy supply, heat utilisation rate, effective width
National Category
Energy Systems Energy Engineering Environmental Sciences
Identifiers
urn:nbn:se:hh:diva-27967 (URN)978-91-7597-088-2 (ISBN)
Public defence
2015-01-08, Hörsal HC3, Hörsalsvägen 14, Göteborg, 10:00 (English)
Opponent
Supervisors
Available from: 2015-03-11 Created: 2015-03-10 Last updated: 2015-03-11Bibliographically approved

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Persson, UrbanWerner, Sven

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