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    Cost optimality and net-zero energy in the renovation of Portuguese residential building stock – Rainha Dona Leonor neighbourhood case study

    ProjectAnnex 56 Cost
    TitleCost optimality and net-zero energy in the renovation of Portuguese residential building stock – Rainha Dona Leonor neighbourhood case study
    Publication TypePapers in International Journals
    Year of Publication2014
    AuthorsFerreira M., Almeida, Manuela G., and Rodrigues A.
    Abstract

    Cost optimality and nearly-zero energy buildings are two fundamental concepts within the current European Union policy related to the energy performance of buildings and consequently related to climate change mitigation and non-renewable resources consumption. While cost optimality is mainly focused on costs, nearly-zero energy buildings are focused on low energy consumption levels and on-site renewables harvesting. Using a residential building from a social housing neighbourhood, this study investigates the most cost-effective packages of renovation measures to achieve a zero energy balance building and compares these packages with those resulting from the calculation of cost-optimal levels. The investigation on the trade-offs between both approaches is relevant to achieve a smooth transition from cost-optimal levels to nearly-zero energy buildings. The results show that the measures that lead to the cost-optimal levels are very similar to the ones needed to achieve the zero energy balance and the results do not change much when variations on the energy prices, discount rates or photovoltaic costs are considered.

    JournalInternational Journal of Sustainable Building Technology and Urban Development
    Volume5
    Issue4
    Pagination306-317
    Date Published2014-11-21
    PublisherTaylor & Francis Ldt.
    ISSN2093-761X (Print); 2093-7628 (online)
    DOI10.1080/2093761X.2014.979268
    KeywordsBuilding renovation, Cost-optimal, Energy Efficiency, Nearly-zero Energy Buildings, net-zero energy buildings
    RightsrestrictedAccess
    Peer reviewedyes
    Statuspublished
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    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 37 researchers holding a PhD of which 27 are faculty professors of the Civil Engineering Department. Read more


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    Centro de Território, Ambiente e Construção
    Escola de Engenharia da Universidade do Minho
    Campus de Azurém
    4800-058 Guimarães, Portugal

    Phone: + 351 253 510 200 (517 206)
    Fax: + 351 253 510 217

    Email: geral@ctac.uminho.pt


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