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Cost-benefit analysis of retrofitting attic-integrated switchable insulation systems of existing US residential buildings

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  • Dehwah, Ammar H.A.
  • Krarti, Moncef

Abstract

This study evaluates the cost-benefit of retrofitting attic using switchable insulation systems (SISs) for existing US residential buildings. For the retrofit analysis, the SIS insulation, is operated using 2-step temperature based controls and its energy performance is compared to that achieved by static code-required insulation installed in attics of detached homes located in 44 US locations. The analysis results show significant correlations between source heating/cooling energy savings and degree-days as well as sol-air temperatures used as climate indicators for the US locations. In addition, it is found that the potential energy savings achieved by attic-integrated SIS insulation retrofit vary widely by climate ranging from 14 kWh/m2 to 51 kWh/m2. For all US locations, the analysis indicates that deploying the attic-integrated SIS can provide higher cost savings compared to static high R-value insulation. Based on a breakeven cost analysis, the annual energy cost savings when replacing the existing insulation with attic-integrated SIS range from $0.05/m2 to $1.57/m2 depending on the climate. The additional cost for the deployment of SIS insulation can be on average 55% more than the current static insulation US prices to ensure its cost-effectiveness as a retrofit measure for attics of US residential buildings.

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  • Dehwah, Ammar H.A. & Krarti, Moncef, 2021. "Cost-benefit analysis of retrofitting attic-integrated switchable insulation systems of existing US residential buildings," Energy, Elsevier, vol. 221(C).
    • Handle: RePEc:eee:energy:v:221:y:2021:i:c:s036054422100089x
    DOI: 10.1016/j.energy.2021.119840
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    References listed on IDEAS

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    1. 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.
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    Cited by:

    1. Dehwah, Ammar H.A. & Krarti, Moncef, 2022. "Optimal controls of precooling strategies using switchable insulation systems for commercial buildings," Applied Energy, Elsevier, vol. 320(C).
    2. Evangelisti, Luca & De Lieto Vollaro, Roberto & Asdrubali, Francesco, 2022. "On the equivalent thermo-physical properties for modeling building walls with unknown stratigraphy," Energy, Elsevier, vol. 238(PA).
    3. Kunwar, Niraj & Salonvaara, Mikael & Iffa, Emishaw & Shrestha, Som & Hun, Diana, 2023. "Performance assessment of active insulation systems in residential buildings for energy savings and peak demand reduction," Applied Energy, Elsevier, vol. 348(C).
    4. Krarti, Moncef & Aldubyan, Mohammad, 2021. "Review analysis of COVID-19 impact on electricity demand for residential buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    5. Dehwah, Ammar H.A. & Krarti, Moncef, 2021. "Performance of precooling strategies using switchable insulation systems for commercial buildings," Applied Energy, Elsevier, vol. 303(C).
    6. Dehwah, Ammar H.A. & Krarti, Moncef, 2021. "Energy performance of integrated adaptive envelope systems for residential buildings," Energy, Elsevier, vol. 233(C).

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