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Effects of heat and electricity saving measures in district-heated multistory residential buildings

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  • Truong, Nguyen Le
  • Dodoo, Ambrose
  • Gustavsson, Leif

Abstract

The effects of heat and electricity saving measures in district-heated buildings can be complex because these depend not only on how energy is used on the demand side but also on how energy is provided from the supply side. In this study, we analyze the effects of heat and electricity saving measures in multistory concrete-framed and wood-framed versions of an existing district-heated building and examine the impacts of the reduced energy demand on different district heat (DH) production configurations. The energy saving measures considered are for domestic hot water reduction, building thermal envelope improvement, ventilation heat recovery (VHR), and household electricity savings. Our analysis is based on a measured heat load profile of an existing DH production system in Växjö, Sweden. Based on the measured heat load profile, we model three minimum-cost DH production system using plausible environmental and socio-political scenarios. Then, we investigate the primary energy implications of the energy saving measures applied to the two versions of the existing building, taking into account the changed DH demand, changed cogenerated electricity, and changed electricity use due to heat and electricity saving measures. Our results show that the difference between the final and primary energy savings of the concrete-framed and wood-framed versions of the case-study building is minor. The primary energy efficiency of the energy saving measures depends on the type of measure and on the composition of the DH production system. Of the various energy saving measures explored, electricity savings give the highest primary energy savings for the building versions. In contrast to the other heat savings measures, VHR gives lower primary energy savings as it also increases electricity demand. Primary energy savings for the building versions are lower where the minimum-cost DH production system includes cogeneration unit compared to where the minimum-cost DH production system comprises heat-only boilers. The primary energy savings are mainly from peak and medium-load boilers even though these production units cover a small share of the total DH production. This study shows that it is essential to consider the interaction between end-use energy saving measures and supply systems for district-heated buildings, to estimate the primary energy efficiency of energy saving measures.

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  • Truong, Nguyen Le & Dodoo, Ambrose & Gustavsson, Leif, 2014. "Effects of heat and electricity saving measures in district-heated multistory residential buildings," Applied Energy, Elsevier, vol. 118(C), pages 57-67.
    • Handle: RePEc:eee:appene:v:118:y:2014:i:c:p:57-67
    DOI: 10.1016/j.apenergy.2013.12.009
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    References listed on IDEAS

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    1. Paiho, Satu & Reda, Francesco, 2016. "Towards next generation district heating in Finland," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 915-924.
    2. Gustafsson, Marcus & Gustafsson, Moa Swing & Myhren, Jonn Are & Bales, Chris & Holmberg, Sture, 2016. "Techno-economic analysis of energy renovation measures for a district heated multi-family house," Applied Energy, Elsevier, vol. 177(C), pages 108-116.
    3. Welsch, Bastian & Göllner-Völker, Laura & Schulte, Daniel O. & Bär, Kristian & Sass, Ingo & Schebek, Liselotte, 2018. "Environmental and economic assessment of borehole thermal energy storage in district heating systems," Applied Energy, Elsevier, vol. 216(C), pages 73-90.
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    5. Hamels, Sam & Himpe, Eline & Laverge, Jelle & Delghust, Marc & Van den Brande, Kjartan & Janssens, Arnold & Albrecht, Johan, 2021. "The use of primary energy factors and CO2 intensities for electricity in the European context - A systematic methodological review and critical evaluation of the contemporary literature," Renewable and Sustainable Energy Reviews, Elsevier, vol. 146(C).
    6. Ayikoe Tettey, Uniben Yao & Gustavsson, Leif, 2020. "Energy savings and overheating risk of deep energy renovation of a multi-storey residential building in a cold climate under climate change," Energy, Elsevier, vol. 202(C).
    7. Stefan Blomqvist & Lina La Fleur & Shahnaz Amiri & Patrik Rohdin & Louise Ödlund (former Trygg), 2019. "The Impact on System Performance When Renovating a Multifamily Building Stock in a District Heated Region," Sustainability, MDPI, vol. 11(8), pages 1-18, April.
    8. Truong, Nguyen Le & Gustavsson, Leif, 2014. "Cost and primary energy efficiency of small-scale district heating systems," Applied Energy, Elsevier, vol. 130(C), pages 419-427.
    9. Zhou, Yang & Shi, Zhixiong & Shi, Zhengyu & Gao, Qing & Wu, Libo, 2019. "Disaggregating power consumption of commercial buildings based on the finite mixture model," Applied Energy, Elsevier, vol. 243(C), pages 35-46.
    10. Stojiljković, Mirko M. & Ignjatović, Marko G. & Vučković, Goran D., 2015. "Greenhouse gases emission assessment in residential sector through buildings simulations and operation optimization," Energy, Elsevier, vol. 92(P3), pages 420-434.
    11. Truong, Nguyen Le & Dodoo, Ambrose & Gustavsson, Leif, 2018. "Effects of energy efficiency measures in district-heated buildings on energy supply," Energy, Elsevier, vol. 142(C), pages 1114-1127.
    12. Lundström, Lukas & Wallin, Fredrik, 2016. "Heat demand profiles of energy conservation measures in buildings and their impact on a district heating system," Applied Energy, Elsevier, vol. 161(C), pages 290-299.
    13. Dodoo, Ambrose & Tettey, Uniben Yao Ayikoe & Gustavsson, Leif, 2017. "Influence of simulation assumptions and input parameters on energy balance calculations of residential buildings," Energy, Elsevier, vol. 120(C), pages 718-730.
    14. Truong, Nguyen Le & Dodoo, Ambrose & Gustavsson, Leif, 2015. "Renewable-based heat supply of multi-apartment buildings with varied heat demands," Energy, Elsevier, vol. 93(P1), pages 1053-1062.
    15. Dodoo, Ambrose & Gustavsson, Leif & Le Truong, Nguyen, 2018. "Primary energy benefits of cost-effective energy renovation of a district heated multi-family building under different energy supply systems," Energy, Elsevier, vol. 143(C), pages 69-90.
    16. Gustafsson, Mattias & Rönnelid, Mats & Trygg, Louise & Karlsson, Björn, 2016. "CO2 emission evaluation of energy conserving measures in buildings connected to a district heating system – Case study of a multi-dwelling building in Sweden," Energy, Elsevier, vol. 111(C), pages 341-350.
    17. Lidberg, T. & Olofsson, T. & Trygg, L., 2016. "System impact of energy efficient building refurbishment within a district heated region," Energy, Elsevier, vol. 106(C), pages 45-53.
    18. Tettey, Uniben Yao Ayikoe & Dodoo, Ambrose & Gustavsson, Leif, 2017. "Energy use implications of different design strategies for multi-storey residential buildings under future climates," Energy, Elsevier, vol. 138(C), pages 846-860.
    19. Dodoo, Ambrose & Gustavsson, Leif & Tettey, Uniben Y.A., 2017. "Final energy savings and cost-effectiveness of deep energy renovation of a multi-storey residential building," Energy, Elsevier, vol. 135(C), pages 563-576.
    20. Delmastro, C. & Martinsson, F. & Dulac, J. & Corgnati, S.P., 2017. "Sustainable urban heat strategies: Perspectives from integrated district energy choices and energy conservation in buildings. Case studies in Torino and Stockholm," Energy, Elsevier, vol. 138(C), pages 1209-1220.
    21. Dodoo, Ambrose & Gustavsson, Leif, 2016. "Energy use and overheating risk of Swedish multi-storey residential buildings under different climate scenarios," Energy, Elsevier, vol. 97(C), pages 534-548.
    22. Tettey, Uniben Yao Ayikoe & Dodoo, Ambrose & Gustavsson, Leif, 2016. "Primary energy implications of different design strategies for an apartment building," Energy, Elsevier, vol. 104(C), pages 132-148.
    23. Vlatko Milić & Shahnaz Amiri & Bahram Moshfegh, 2020. "A Systematic Approach to Predict the Economic and Environmental Effects of the Cost-Optimal Energy Renovation of a Historic Building District on the District Heating System," Energies, MDPI, vol. 13(1), pages 1-25, January.
    24. Lidberg, T. & Gustafsson, M. & Myhren, J.A. & Olofsson, T. & Ödlund (former Trygg), L., 2018. "Environmental impact of energy refurbishment of buildings within different district heating systems," Applied Energy, Elsevier, vol. 227(C), pages 231-238.
    25. Nguyen, Truong & Gustavsson, Leif & Dodoo, Ambrose & Tettey, Uniben Yao Ayikoe, 2020. "Implications of supplying district heat to a new urban residential area in Sweden," Energy, Elsevier, vol. 194(C).

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