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Expectations and Outcomes when Quantifying Energy Improvements Achieved by Building Envelope Retrofitting

Author

Listed:
  • Fernando Martín-Consuegra

    (Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC, c/Serrano Galvache, 4, 28002 Madrid, Spain)

  • Camila Andrea Ludueña

    (Escuela Técnica Superior de Arquitectura, Universidad Politécnica de Madrid, Avda. Juan de Herrera 4, 28040 Madrid, Spain)

  • Fernando De Frutos

    (Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC, c/Serrano Galvache, 4, 28002 Madrid, Spain)

  • Borja Frutos

    (Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC, c/Serrano Galvache, 4, 28002 Madrid, Spain)

  • Carmen Alonso

    (Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC, c/Serrano Galvache, 4, 28002 Madrid, Spain)

  • Ignacio Oteiza

    (Instituto de Ciencias de la Construcción Eduardo Torroja, CSIC, c/Serrano Galvache, 4, 28002 Madrid, Spain)

Abstract

This paper assesses the energy efficiency of two buildings constructed in the 1960s in Madrid. One of the buildings is refurbished including passive energy efficiency improvements, while the other remains in its original state. The area is one of a series of low-income residential inefficient developments built by the state on the capital’s outskirts in the 1950s. Their buildings require huge amounts of energy to meet occupants’ basic energy needs. This paper quantifies the energy savings and improved comfort achieved by building envelope energy retrofitting. For this purpose, it proposes a comprehensive methodology spanning data monitoring in homes in buildings, occupant surveys and energy simulation models—a standard approach to estimating improvement potential. Our aim is to compare the expected energy savings predicted by energy certificates with monitored data. The paper concludes that the comfort level in the retrofitted building improved tangibly but that the differing behaviours of the building’s occupants make the energy saving difficult to quantify with any precision. The calibrated model targets energy consumption savings after renovation of approximately 25% in heating and 50% in cooling for a typical household of four people with basic comfort needs reasonably met. Regarding heating consumption, the results of the calibrated model are lower than expected savings using the official certificate input data. However, cooling consumption savings were found to be greater than expected.

Suggested Citation

  • Fernando Martín-Consuegra & Camila Andrea Ludueña & Fernando De Frutos & Borja Frutos & Carmen Alonso & Ignacio Oteiza, 2024. "Expectations and Outcomes when Quantifying Energy Improvements Achieved by Building Envelope Retrofitting," Sustainability, MDPI, vol. 16(8), pages 1-25, April.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:8:p:3214-:d:1374163
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    References listed on IDEAS

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    1. Sun, Kaiyu & Hong, Tianzhen & Taylor-Lange, Sarah C. & Piette, Mary Ann, 2016. "A pattern-based automated approach to building energy model calibration," Applied Energy, Elsevier, vol. 165(C), pages 214-224.
    2. Berger, Tania & Höltl, Andrea, 2019. "Thermal insulation of rental residential housing: Do energy poor households benefit? A case study in Krems, Austria," Energy Policy, Elsevier, vol. 127(C), pages 341-349.
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