Bottom-up building stock retrofit based on levelized cost of saved energy

Oberegger, Ulrich Filippi; Pernetti, Roberta; Lollini, Roberto

doi:10.1016/j.enbuild.2020.109757

Cited by 27 publications

(11 citation statements)

References 33 publications

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“…Technically speaking, the feasibility of low energy or even net-zero residential buildings has been confirmed [92], as well as the specifications of intervention packages for those already build [93] and guidelines for the implementation of nearly zero-energy neighborhoods [94]. However, action plans for improving the existing building stock still deserve research because of the need to couple construction works and systems enhancement into the daily life of occupants-buildings are usually inhabited and not empty-and the existence of various economic perspectives [95], social habits or behaviors and decision-making capacities [96].…”

Section: The Marginal Implicit Value Of Energy Efficiency In Buildingsmentioning

confidence: 99%

Assessing Multiple Benefits of Housing Regeneration and Smart City Development: The European Project SINFONIA

Bisello

2020

Sustainability

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The urban energy transition towards more sustainable energy production and consumption systems is at the top of the European Union political agenda. Several demonstration projects are dealing with the deep-energy retrofit of real-estate assets to show how technological and societal innovation can provide new investment opportunities while enhancing citizens’ quality of life by delivering multiple benefits. In this framework, the EU smart city project SINFONIA has developed and tested a new comprehensive framework to define, identify, and evaluate the main multiple benefits expected from similar initiatives. The present contribution reviews the three assessment exercises carried out in the lighthouse city of Bolzano during the project execution, consisting of an investigation of the users’ stated preferences, an evaluation of consumers‘ revealed preferences and a multicriteria analysis of homeowners’ priorities. It offers an overview of the main achievements and sheds light on further investigatory paths applicable to Positive Energy Districts assessment.

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Section: The Marginal Implicit Value Of Energy Efficiency In Buildingsmentioning

confidence: 99%

Assessing Multiple Benefits of Housing Regeneration and Smart City Development: The European Project SINFONIA

Bisello

2020

Sustainability

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“…A wider evaluation of the positive impact on the building stock is essential for supporting building renovation uptake across Europe, since it allows quantifying the potential savings and benefits and to prioritize the most effective interventions for the user purposes [26]. In this regard, there are several studies that deal with renovation scenarios at building stock scale through different approaches: the application of statistical methods [27], the definition of a reference database of solutions and associated performances [28] or, in most cases, by defining a set of building archetypes [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Repository of Deep Renovation Packages Based on Industrialized Solutions: Definition and Application

2021

Self Cite

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Renovation Wave aims to boost the uptake of deep renovation towards the CO2 emission targets for 2030. In this perspective, there is the need of technologies and solution sets for improving the deep renovation process as well as demonstrating the performances for supporting the stakeholders in the decision-making process. To cope with the issue, this work presents a methodology for setting up a repository of building deep renovation packages that integrates industrialised facade technologies and more traditional solutions. The performances feeding into the repository have been evaluated by means of transient detailed simulations on a set of reference buildings in representative European climate conditions. The renovation packages are evaluated in terms of key performance indicators dealing with five areas: energy, comfort, pollutant emissions, cost, and renovation time. The defined repository includes 289 assessed technology packages and associated performances across Europe, providing a comprehensive support to identify the most effective solutions according to the user needs. The paper presents the application of the repository with two examples of stakeholders’ decision-making paths for selecting the deep renovation packages according to different priorities and expected targets.

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“…The combo of energy that is made available by implementing energy efficiency measures and solar energy generation might provide a greater potential for electrifying constant loads (such as required for electric vehicles (EVs) and domestic hot water (DHW) heating) than would be possible if they were implemented separately. Various studies have been conducted to quantify the potential energy savings from efficiency measures [17,18], energy generation from on-site solar energy conversion technologies [19,20], and their associated cost and emissions analysis [21][22][23]. However, from an extensive literature review, there are not any studies that evaluate how the energy supplied from building energy upgrades can serve for decarbonization purposes.…”

Section: Introductionmentioning

confidence: 99%

Decarbonizing Local Mobility and Greenhouse Agriculture through Residential Building Energy Upgrades: A Case Study for Québec

2021

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Electrification is an efficient way to decarbonize by replacing fossil fuels with low-emission power. In addition, energy efficiency measures can reduce consumption, making it easier to shift to a zero-carbon society. In Québec, upgrades to aging buildings that employ electric resistance heating offer a unique opportunity to free up large amounts of hydroelectricity that can serve to decarbonize heating in other buildings. However, another source of energy would be needed to electrify mobility because efficiency measures free up small amounts of electricity in summer compared to winter. This study reveals how building efficiency measures combined with solar electricity generation provide an energy profile that matches the requirements for decarbonizing both mobility and heating. The TRNSYS software was used to simulate the annual energy performance of an existing house and retrofitted/rebuilt low-energy houses equipped with a photovoltaic (PV) roof in Montreal, Québec, Canada (45.5° N). The electricity that is made available by upgrading the houses is mainly considered for powering battery and fuel cell electric vehicles (BEVs and FCEVs) and electrifying heating in greenhouses. The results indicate that retrofitting 16% or rebuilding 12% of single-detached homes in Québec can provide enough electricity to decarbonize heating energy use in existing greenhouses and to operate the new greenhouses required for growing all fresh vegetables locally. If all the single-detached houses that employ electric resistance heating are upgraded, 33.4 and 21.8 TWh year−1 of electricity would be available for decarbonization, equivalent to a 19% and 12% increase of the province’s electricity supply for the retrofitted or rebuilt houses, respectively. This is enough energy to convert 83–100% of personal vehicles to BEVs or 35–56% to FCEVs. Decarbonization using the electricity that is made available by upgrading to low-energy solar houses could reduce the province’s greenhouse gas (GHG) emissions by approximately 32% (26.5 MtCO2eq). The time required for the initial embodied GHG emissions to surpass the emissions avoided by electrification ranges from 3.4 to 11.2 years. Building energy efficiency retrofits/rebuilds combined with photovoltaics is a promising approach for Québec to maximize the decarbonization potential of its existing energy resources while providing local energy and food security.

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Bottom-up building stock retrofit based on levelized cost of saved energy

Cited by 27 publications

References 33 publications

Assessing Multiple Benefits of Housing Regeneration and Smart City Development: The European Project SINFONIA

Assessing Multiple Benefits of Housing Regeneration and Smart City Development: The European Project SINFONIA

Repository of Deep Renovation Packages Based on Industrialized Solutions: Definition and Application

Decarbonizing Local Mobility and Greenhouse Agriculture through Residential Building Energy Upgrades: A Case Study for Québec

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