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Swing Gustafsson, MoaORCID iD iconorcid.org/0000-0002-3630-663X
Publications (5 of 5) Show all publications
Swing Gustafsson, M., Myhren, J. A. & Dotzauer, E. (2018). Life cycle cost of heat supply to areas with detached houses: a comparison of district heating and heat pumps from an energy system perspective. Energies, 11(12), Article ID 3266.
Open this publication in new window or tab >>Life cycle cost of heat supply to areas with detached houses: a comparison of district heating and heat pumps from an energy system perspective
2018 (English)In: Energies, E-ISSN 1996-1073, Vol. 11, no 12, article id 3266Article in journal (Refereed) Published
Abstract [en]

There are different views on whether district heating (DH) or heat pumps (HPs) is or are the best heating solution in order to reach a 100% renewable energy system. This article investigates the economic perspective, by calculating and comparing the energy system life cycle cost (LCC) for the two solutions in areas with detached houses. The LCC is calculated using Monte Carlo simulation, where all input data is varied according to predefined probability distributions. In addition to the parameter variations, 16 different scenarios are evaluated regarding the main fuel for the DH, the percentage of combined heat and power (CHP), the DH temperature level, and the type of electrical backup power. Although HP is the case with the lowest LCC for most of the scenarios, there are alternatives for each scenario in which either HP or DH has the lowest LCC. In alternative scenarios with additional electricity transmission costs, and a marginal cost perspective regarding the CHP investment, DH has the lowest LCC overall, taking into account all scenarios. The study concludes that the decision based on energy system economy on whether DH should expand into areas with detached houses must take local conditions into consideration.

Place, publisher, year, edition, pages
MDPI, 2018
Keywords
Combined heat and power, District heating, Energy system, Heat pump, Life cycle cost
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38343 (URN)10.3390/en11123266 (DOI)000455358300027 ()2-s2.0-85059252156 (Scopus ID)
Available from: 2022-04-01 Created: 2022-04-01 Last updated: 2023-08-28Bibliographically approved
Swing Gustafsson, M., Myhren, J. A. & Dotzauer, E. (2017). Mapping of heat and electricity consumption in a medium size municipality in Sweden. Paper presented at 8th International Conference on Applied Energy, ICAE2016, 8-11 October 2016, Beijing, China. Energy Procedia, 105, 1434-1439
Open this publication in new window or tab >>Mapping of heat and electricity consumption in a medium size municipality in Sweden
2017 (English)In: Energy Procedia, ISSN 1876-6102, Vol. 105, p. 1434-1439Article in journal (Refereed) Published
Abstract [en]

The Nordic electricity system faces many challenges with an increased share of intermittent power from renewable sources. One such challenge is to have enough capacity installed to cover the peak demands. In Sweden these peaks appear during the winter since a lot of electricity is used for heating. In this paper a mapping of the heat and electricity consumption in a medium size municipality in Sweden is presented. The paper analyze the potential for a larger market share of district heating (DH) and how it can affect the electrical power balance in the case study. The current heat market (HM) and electricity consumption is presented and divided into different user categories. Heating in detached houses not connected to DH covers 25 % of the HM, and 30 % of the electricity consumption during the peak hours. Converting the detached houses not connected to DH in densely populated areas to DH could reduce the annual electricity consumption by 10 %, and the electricity consumption during the peak hours by 20 %.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
District heating, heat market, electrical power balance, combined heat and power, detached houses, electricity consumption
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38345 (URN)10.1016/j.egypro.2017.03.534 (DOI)000404967901080 ()2-s2.0-85020728483 (Scopus ID)
Conference
8th International Conference on Applied Energy, ICAE2016, 8-11 October 2016, Beijing, China
Funder
Knowledge Foundation
Available from: 2022-03-31 Created: 2022-03-31 Last updated: 2023-08-28Bibliographically approved
Swing Gustafsson, M., Gustafsson, M., Myhren, J. A. & Dotzauer, E. (2016). Primary energy use in buildings in a Swedish perspective. Energy and Buildings, 130, 202-209
Open this publication in new window or tab >>Primary energy use in buildings in a Swedish perspective
2016 (English)In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 130, p. 202-209Article in journal (Refereed) Published
Abstract [en]

The building sector accounts for a large part of the energy use in Europe and is a sector where the energy efficiency needs to improve in order to reach the EU energy and climate goals. The energy efficiency goal is set in terms of primary energy even though there are different opinions on how to calculate primary energy. When determining the primary energy use in a building several assumptions are made regarding allocation and the value of different energy sources. In order to analyze the difference in primary energy when different methods are used, this study use 16 combinations of different assumptions to calculate the primary energy use for three simulated heating and ventilations systems in a building. The system with the lowest primary energy use differs depending on the method used. Comparing a system with district heating and mechanical exhaust ventilation with a system with district heating, mechanical exhaust ventilation and exhaust air heat pump, the former has a 40% higher primary energy use in one scenario while the other has a 320% higher in another scenario. This illustrates the difficulty in determining which system makes the largest contribution to fulfilling the EU energy and climate goals.

Place, publisher, year, edition, pages
Elsevier, 2016
Keywords
Primary energy; Primary energy factors; Energy efficiency; District heating; Heat pump; Air heat recovery
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38338 (URN)10.1016/j.enbuild.2016.08.026 (DOI)000385323900019 ()2-s2.0-84983483204 (Scopus ID)
Funder
Knowledge Foundation
Available from: 2016-09-08 Created: 2022-04-01Bibliographically approved
Swing Gustafsson, M., Myhren, J. A. & Dotzauer, E. (2014). Primary energy reduction in buildings: Case study on a residential building in Falun, Sweden. In: Anna Land, Swedish District Heating Association (Ed.), Proceedings from the 14th International Symposium on District Heating and Cooling: . Paper presented at 14th International Symposium on District Heating and Cooling September, Stockholm, Sweden, September 6-10, 2014 (pp. 543-545).
Open this publication in new window or tab >>Primary energy reduction in buildings: Case study on a residential building in Falun, Sweden
2014 (English)In: Proceedings from the 14th International Symposium on District Heating and Cooling / [ed] Anna Land, Swedish District Heating Association, 2014, p. 543-545Conference paper, Published paper (Refereed)
Abstract [en]

Since a large share of the total European primary energy is consumed in the building sector, buildings have to become more energy efficient in order to reach the goals of the European energy efficiency directive. In Sweden, focus has been on lowering final energy consumption, not primary energy consumption. A relevant question today is whether a general understanding of the primary energy concept is needed to encourage selection of better energy efficiency measures from an environmental perspective. There are however uncertainties of how to calculate primary energy consumption since different primary energy factors (PEF) are used by different actors, especially for district heating (DH) and electricity (EL.).

In this study total primary energy consumption was calculated for a residential building before and after several renovation measures were made. The major change after the renovation was that a large share of the DH was substituted by heat from an exhaust air heat pump and solar collectors. A range of commonly used PEFs were assessed.

The evaluation showed that the energy efficiency measures reduced the total primary energy consumption for most combinations of PEFs. The most essential was how the DH was valued. A low PEF for DH in combination with most of the PEFs for electricity could even result in higher total primary energy consumption after the renovation.  

National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38346 (URN)978-91-85775-24-8 (ISBN)
Conference
14th International Symposium on District Heating and Cooling September, Stockholm, Sweden, September 6-10, 2014
Projects
Reesbe
Funder
Knowledge Foundation
Available from: 2016-07-28 Created: 2022-04-01Bibliographically approved
Swing Gustafsson, M., Myhren, J. A. & Dotzauer, E.Assessment of the potential for district heating to lower the peak electricity consumption in a medium size municipality in Sweden.
Open this publication in new window or tab >>Assessment of the potential for district heating to lower the peak electricity consumption in a medium size municipality in Sweden
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Sweden faces several challenges when more intermittent renewable power is integrated into the energy system. One of the challenges is to have enough electrical power available in periods with low production from intermittent sources. A solution to the problem could be to reduce the electricity peak demand and at the same time produce more electricity during peak hours. One way of doing this is to convert electricity based heating in buildings to district heating (DH) based on combined heat and power (CHP).

The study analyzes how much a medium sized Swedish municipality can contribute to lower the electricity peak demand. This is done by quantifying the potential to reduce the peak demand for six different scenarios of the future heat market volume and heat market shares regarding electricity based heating and DH in 2050.

The main finding is that electricity consumption will be reduced by 35-70 % during the peak hour (and 20-40 % on a yearly basis) for all the six scenarios studied compared with the current situation. If the aim is to lower the electricity peak demand in the future, the choice of heating system is more important than reducing the heat demand itself. For the scenario with a large share of DH, it is possible to cover the electricity peak demand in the municipality by using CHP.

National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38341 (URN)
Available from: 2016-12-15 Created: 2022-04-03Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-3630-663X

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