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Effects of energy efficiency measures in district-heated buildings on energy supply
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (SBER)
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (SBER)
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (SBER)ORCID iD: Ecotechnology
2018 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 142, p. 1114-1127Article in journal (Refereed) Published
Abstract [en]

In this study we estimate the final and primary energy savings for different energy efficiency measures in a multi-apartment building when heated by small-, medium- or large-scale district-heat production systems (DHSs). The small-scale system is based on heat-only boilers, whereas the other two also include cogeneration of district heat and electricity. In the systems with cogeneration units, a change in building's heat demand may influence cogenerated electricity and hence the overall power system. For the building analyzed, the estimated annual total final heat and electricity savings were 136 (54%) and 30 MWh (52%), respectively, giving total annual primary energy savings of 177–289 MWh. This varies as the ratio of primary and final heat savings depends on the type of energy efficiency measure and the energy supply. For the same heat savings measure, a system with a heat-only boiler gave the highest primary energy savings, whereas a system based mostly on cogeneration of district heat and electricity in combination with averaged-efficiency standalone power plants gave the lowest primary energy savings. When the energy supply is based on energy-efficient renewable-based system, the differences in primary energy savings between large- and small-scale DHSs are minor for the same energy efficiency measure.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 142, p. 1114-1127
Keywords [en]
Energy efficiency; District-heated building; Primary energy use; District heat; Renewable energy system
National Category
Energy Systems
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
URN: urn:nbn:se:lnu:diva-69549DOI: 10.1016/j.energy.2017.10.071ISI: 000424854900094OAI: oai:DiVA.org:lnu-69549DiVA, id: diva2:1170465
Available from: 2018-01-03 Created: 2018-01-03 Last updated: 2018-03-02Bibliographically approved

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Truong, Nguyen LeDodoo, AmbroseGustavsson, Leif

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CiteExportLink to record
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  • apa
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