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Energy Use and Perceived Indoor Environment in a Swedish Multifamily Building before and after Major Renovation

Author

Listed:
  • Lina La Fleur

    (Division of Energy Systems, Department of Management and Engineering, Linköping University, SE-581 83 Linköping, Sweden)

  • Patrik Rohdin

    (Division of Energy Systems, Department of Management and Engineering, Linköping University, SE-581 83 Linköping, Sweden)

  • Bahram Moshfegh

    (Division of Energy Systems, Department of Management and Engineering, Linköping University, SE-581 83 Linköping, Sweden
    Division of Building, Energy and Environment Technology, Department of Technology and Environment, University of Gävle, SE-801 76 Gävle, Sweden)

Abstract

Improved energy efficiency in the building sector is a central goal in the European Union and renovation of buildings can significantly improve both energy efficiency and indoor environment. This paper studies the perception of indoor environment, modelled indoor climate and heat demand in a building before and after major renovation. The building was constructed in 1961 and renovated in 2014. Insulation of the façade and attic and new windows reduced average U -value from 0.54 to 0.29 W/m 2 ·K. A supply and exhaust ventilation system with heat recovery replaced the old exhaust ventilation. Heat demand was reduced by 44% and maximum supplied heating power was reduced by 38.5%. An on-site questionnaire indicates that perceived thermal comfort improved after the renovation, and the predicted percentage dissatisfied is reduced from 23% to 14% during the heating season. Overall experience with indoor environment is improved. A sensitivity analysis indicates that there is a compromise between thermal comfort and energy use in relation to window solar heat gain, internal heat generation and indoor temperature set point. Higher heat gains, although reducing energy use, can cause problems with high indoor temperatures, and higher indoor temperature might increase thermal comfort during heating season but significantly increases energy use.

Suggested Citation

  • Lina La Fleur & Patrik Rohdin & Bahram Moshfegh, 2018. "Energy Use and Perceived Indoor Environment in a Swedish Multifamily Building before and after Major Renovation," Sustainability, MDPI, vol. 10(3), pages 1-20, March.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:3:p:766-:d:135747
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    References listed on IDEAS

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    1. Allard, I. & Olofsson, T. & Hassan, O.A.B., 2013. "Methods for energy analysis of residential buildings in Nordic countries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 22(C), pages 306-318.
    2. Stefan Olsson & Tove Malmqvist & Mauritz Glaumann, 2015. "Managing Sustainability Aspects in Renovation Processes: Interview Study and Outline of a Process Model," Sustainability, MDPI, vol. 7(6), pages 1-17, May.
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    Cited by:

    1. Lina La Fleur & Patrik Rohdin & Bahram Moshfegh, 2019. "Energy Renovation versus Demolition and Construction of a New Building—A Comparative Analysis of a Swedish Multi-Family Building," Energies, MDPI, vol. 12(11), pages 1-27, June.
    2. Constantin C. Bungău & Ioana Francesca Prada & Marcela Prada & Constantin Bungău, 2019. "Design and Operation of Constructions: A Healthy Living Environment-Parametric Studies and New Solutions," Sustainability, MDPI, vol. 11(23), pages 1-19, December.
    3. Paula Ala-Kotila & Terttu Vainio & Jarmo Laamanen, 2020. "The Influence of Building Renovations on Indoor Comfort—A Field Test in an Apartment Building," Energies, MDPI, vol. 13(18), pages 1-18, September.
    4. Piotr Michalak, 2023. "Simulation and Experimental Study on the Use of Ventilation Air for Space Heating of a Room in a Low-Energy Building," Energies, MDPI, vol. 16(8), pages 1-17, April.
    5. 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.

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