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Effects of energy efficiency measures in district-heated buildings on energy supply

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

Abstract

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.

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  • 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.
    • Handle: RePEc:eee:energy:v:142:y:2018:i:c:p:1114-1127
    DOI: 10.1016/j.energy.2017.10.071
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    References listed on IDEAS

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    2. 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.
    3. Ma, Zheng & Knotzer, Armin & Billanes, Joy Dalmacio & Jørgensen, Bo Nørregaard, 2020. "A literature review of energy flexibility in district heating with a survey of the stakeholders’ participation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 123(C).
    4. Tae-Keun Oh & Donghwan Lee & Minsoo Park & Gichun Cha & Seunghee Park, 2018. "Three-Dimensional Visualization Solution to Building-Energy Diagnosis for Energy Feedback," Energies, MDPI, vol. 11(7), pages 1-18, July.
    5. Piccardo, C. & Dodoo, A. & Gustavsson, L. & Tettey, U.Y.A., 2020. "Retrofitting with different building materials: Life-cycle primary energy implications," Energy, Elsevier, vol. 192(C).
    6. Piccardo, Chiara & Gustavsson, Leif, 2023. "Deep energy retrofits using different retrofit materials under different scenarios: Life cycle cost and primary energy implications," Energy, Elsevier, vol. 281(C).

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