Identifying optimal renovation schedules for building portfolios: Application in a social housing context under multi-year funding constraints

Pannier, Marie-Lise; Recht, Thomas; Robillart, Maxime; Schalbart, Patrick; Peuportier, Bruno; Mora, Laurent

doi:10.1016/j.enbuild.2021.111290

Cited by 22 publications

(10 citation statements)

References 46 publications

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“…Discrete design parameters are possible renovation options, and continuous parameters can take any value within a defined range, for example, the insulation thickness. Several studies have used NSGA-II for building renovation 73 , 74 . The main drawback of NSGA-II is the associated computational cost, especially considering the uncertain parameters.…”

Section: Methodsmentioning

confidence: 99%

Strategies for robust renovation of residential buildings in Switzerland

Galimshina,

Moustapha,

Hollberg

et al. 2024

Nat Commun

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Building renovation is urgently required to reduce the environmental impact associated with the building stock. Typically, building renovation is performed by envelope insulation and/or changing the fossil-based heating system. The goal of this paper is to provide strategies for robust renovation considering uncertainties on the future evolution of climate, energy grid, and user behaviors, amongst others by applying life cycle assessment and life cycle cost analysis. The study includes identifying optimal renovation options for the envelope and heating systems for building representatives from all construction periods that are currently in need of renovation in Switzerland. The findings emphasize the paramount importance of heating system replacements across all construction periods. Notably, when incorporating bio-based insulation materials, a balance emerges between environmental impact reduction and low energy operation costs. This facilitates robust, equitable, and low-carbon transformations in Switzerland and similar Northern European contexts while avoiding a carbon spike due to the embodied carbon of the renovation.

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Section: Methodsmentioning

confidence: 99%

Strategies for robust renovation of residential buildings in Switzerland

Galimshina,

Moustapha,

Hollberg

et al. 2024

Nat Commun

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“…To do this, we use the Non-dominated sorting genetic algorithm II (NSGA-II) that is in particular useful while dealing with design and continuous parameters, where design parameters represent the possible renovation options and continuous parameters are related to those that can take any value within a defined range. Several studies have used NSGA-II for building renovation (Chantrelle et al, 2011;Pannier et al, 2021). The main drawback of NSGA-II is the associated cost especially considering the uncertain parameters.…”

Section: Integrated Assessment Of Lca and Lcca Uncertain Parameters A...mentioning

confidence: 99%

Recommendations for robust renovation strategies of Swiss residential buildings

Galimshina

Moustapha

Hollberg

et al. 2023

Preprint

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Building renovation is urgently required to reduce the environmental impact associated with the building stock. Typically, building renovation is performed by envelope insulation and/or changing the fossil-based heating system. Life cycle assessment and life cycle cost analysis are seen as suitable methods to evaluate the performance of a building in terms of environmental impacts and cost. However, the results are highly affected by uncertainty. The goal of this paper is to provide recommendations for robust renovation strategies considering uncertainties on future evolution of climate, energy grid, user behaviors. The method includes identifying optimal renovation options for the envelope and heating systems for building-representatives from all construction periods that are currently in need of retrofit in Switzerland. Conventional and bio-based materials are examined with inclusion of dynamic carbon storage potential. The results of the analysis show that heating system is a priority for building renovation for all the considered construction periods. The results also show that if only conventional materials are considered for building renovation, optimal solution does not prescribe deep renovation and higher energy consumption during life time is favored. However, when bio-based insulation materials can be used, the opposite conclusion is drawn and synergies between low environmental impact and low energy costs during life cycle are identified. Such renovation strategies pave the way for a just and low carbon transformation of the Swiss building stock.

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“…Other studies dealing with the cost-effectiveness of energy retrofit investments have used the building typology approach, which consists in the use of representative buildings or building types identified and classified in function of specific aspects (e.g., building use, building age, building size and climatic zone) [44]. Some of these works have dealt with residential buildings [31,[48][49][50][51][52][53][54][55][56]. For example, Ascione et al [56], by using a reference multi-family housing in the city of Naples, applied economic methods to select the best profitable packages of energy efficiency.…”

Section: A Brief Review On the Economic Evaluation Of Building Renovation Investmentsmentioning

confidence: 99%

A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment

et al. 2021

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Office buildings built before the pre-1960 age constitute a relevant group for analyzing the energy performance of the Portuguese building sector. A dynamic energy simulation was used to assess the energy performance of an existing office building located in the town of Bragança, Portugal. By using a staged renovation approach, two passive technologies applied to the building envelope and an efficient domestic hot water system were selected and a financial evaluation through the net saving (NS) method was undertaken to choose the best efficiency measures/packages for improving the building’s energy performance. Real discount rates of 3% and 1% were used in the financial evaluation. Considering the real discount rate of 3%, the results showed that only two out seven retrofit options had a positive financial return. By using the real discount rate of 1%, all retrofit options were found to be financially efficient. The results of the study corroborated those of earlier works that found that the financial profitability of energy renovation investments is very sensitive to the discount rate used in the analysis. The results of the study also suggested that the staged renovation approach used in the analysis is economically feasible, and that this approach is an alternative to one-step renovation approach to help to achieve the country´s energy and climate targets by 2030. Suggestions for future research conducted for office buildings in the different climate zones and other age groups in Portugal are proposed.

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Identifying optimal renovation schedules for building portfolios: Application in a social housing context under multi-year funding constraints

Cited by 22 publications

References 46 publications

Strategies for robust renovation of residential buildings in Switzerland

Strategies for robust renovation of residential buildings in Switzerland

Recommendations for robust renovation strategies of Swiss residential buildings

A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment

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