Browsing by Author "Aelenei, Daniel"
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- Aplicação das tecnologias facilitadoras essenciais (TFE) na gestão, controlo e monitorização inteligente de edifíciosPublication . Lourenço, José Marco; Aelenei, Laura Elena; Facão, Jorge; Aelenei, Daniel; Pina, João MurtaRESUMO: A partir de 31 de dezembro de 2020, pretende-se que todos os edifícios novos na União Europeia sejam nZEB, edifícios com necessidades energéticas quase nulas. No edifício Solar XXI, em Lisboa, encontra-se uma sala laboratorial sob monitorização equipada com sistemas de controlo de temperatura. O objetivo deste estudo é validar uma simulação da sala em EnergyPlus com os dados obtidos experimentalmente e determinar o impacto dos sistemas nas necessidades energéticas e conforto térmico dos ocupantes. Dois sistemas em particular foram analisados: o sistema BIPV, para o inverno, e o sistema dos tubos enterrados, para o verão. Após validação, uma simulação da sala sem os sistemas foi efetuada, de modo a determinar o impacto de cada um. Resultados mostram que, para os períodos analisados, o BIPV reduziu as necessidades de aquecimento em 20%, além de aumentar o conforto térmico do ocupante, e os tubos enterrados reduziriam em 93% as necessidades energéticas de arrefecimento. A análise efetuada contribui para a promoção dos KETs no setor dos edifícios.
- Case studies : adaptive facade networkPublication . Aelenei, Laura Elena; Aelenei, Daniel; Romano, Rosa; Mazzucchelli, Enrico Sergio; Brzezicki, Marcin; Rico-Martinez, Jose MiguelABSTRACT: Adaptive building envelopes can provide improvements in building energy efficiency and economics, through their capability to change their behaviour in real time according to indooroutdoor parameters. This may be by means of materials, components or systems. As such, adaptive façades can make a significant and viable contribution to meeting the EU´s 2020 targets. Several different adaptive façade concepts have already been developed, and an increase in emerging, innovative solutions is expected in the near future. In this context the EU initiative COST Action TU 1403 aims to harmonize, share and disseminate technological knowledge on adaptive facades at a European level. According to the definition given by this COST Action, an adaptive façade is a building envelope consisting of multifunctional and highly adaptive systems that is able to change its functions, features, or behaviour over time in response to transient performance requirements and boundary conditions, with the aim of improving the overall building performance. In order to explore the available and emerging technologies focusing on adaptive façades, Working Group 1 of the COST Action undertook research to form a database of adaptive façade case studies and projects structured in accordance with a simple classification – materials, components and systems. In addition to this, details of the purpose of the systems/components/materials with adaptive features and the working principle of each technology were also collected together with data regarding design practice, technology readiness, and economical aspects, among others. The information was collected with the help of a specific online survey (structured in the following main sections: detailed description - metrics- characterization- economic aspects – references). The database includes 165 cases of adaptive façade systems, components, and materials that allowed a variety of analyses to be carried out. According to the classification adopted within WG1 (materials, components, systems), each of the classification terms are introduced together with examples from the case study database in the following sections. This volume ends with a section dedicated to future developments, where different issues are addressed such as embedded functionality and efficiency amd biomimetic inspirations. The importance of adaptive façades through their flexibility, and intelligent design within the context of smart cities is also discussed.
- Design issues for net zero-energy buildingsPublication . Aelenei, Laura Elena; Aelenei, Daniel; Goncalves, Helder; Lollini, Roberto; Musall, Eike; Scognamiglio, Alessandra; Cubi, Eduard; Noguchi, MassaNet Zero-Energy Buildings (NZEBs) have received increased attention in recent years as a result of constant concerns for energy supply constraints, decreasing energy resources, increasing energy costs and rising impact of greenhouse gases on world climate. Promoting whole, building strategies that employ passive measures with energy efficient systems and technologies using renewable energy, became a European political strategy since the publication of the Energy Performance of Building Directive recasr in May 2010 by the European Parliament and Council.
- Design issues for net zero-energy buildingsPublication . Aelenei, Laura Elena; Aelenei, Daniel; Goncalves, Helder; Lollini, Roberto; Musall, Eike; Scognamiglio, Alessandra; Cubi, Eduard; Noguchi, MassaNet Zero-Energy Buildings (NZEBs) have received increased attention in recent years as a result of constant concerns about energy supply constraints, decreasing energy resources, increasing energy costs and the rising impact of greenhouse gases on world climate. Promoting whole building strategies that employ passive measures together with energy efficient systems and technologies using renewable energy became a European political strategy following the publication of the Energy Performance of Buildings Directive recast in May 2010 by the European Parliament and Council. However designing successful NZEBs represents a challenge because the definitions are somewhat generic while assessment methods and monitoring approaches remain under development and the literature is relatively scarce about the best sets of solutions for different typologies and climates likely to deliver an actual and reliable performance in terms of energy balance (consumed vs generated) on a cost-effective basis. Additionally the lessons learned from existing NZEB examples are relatively scarce. The authors of this paper, who are participants in the IEA SHC Task 40-ECBCS Annex 52, “Towards Net Zero Energy Solar Buildings”, are willing to share insights from on-going research work on some best practice leading NZEB residential buildings. Although there is no standard approach for designing a Net Zero-Energy Building (there are many different possible combinations of passive and efficient active measures, utility equipment and on-site energy generation technologies able to achieve the net-zero energy performance), a close examination of the chosen strategies and the relative performance indicators of the selected case studies reveal that it is possible to achieve zero-energy performance using well known strategies adjusted so as to balance climate drivendemand for space heating/cooling, lighting, ventilation and other energy uses with climate-driven supply from renewable energy resources.
- Design strategies for non-residential zero-energy buildings: lessons learned from Task40/Annex 52: towards net zero-energy solar buildingsPublication . Aelenei, Daniel; Aelenei, Laura Elena; Musall, Eike; Cubi, Eduard; Ayoub, Josef; Belleri, AnnamariaNet zero-energy buildings (Net ZEBs) have been the object of various studies in recent years as various countries have set this performance as long-term goal of their energy policies. Designing successful Net ZEBs represents a challenge since the definitions are yet generic, the assessment method and monitoring approach are under development and the literature is relatively scarce about the best sets of solutions for different typologies and climates likely to deliver an actual and reliable performance in terms of energy balance (used consumed vs. generated) on a costeffective basis. The International collaborative research initiative between the Solar Heating and Cooling (SHC) and the Energy Conservation in Buildings and Community Systems (ECBCS) through Task 40/Annex 52 - Towards Net-Zero Energy Solar Buildings-, summarises most of the recent developments in this field. The authors of this article, who are participants in this task, are providing insights from on-going research work on some best practice leading projects which have been the object of an exploratory cross-case analysis in order to facilitate identification of the set of relevant design strategies. The close inspection of the strategies and indicators of the relative performance of the projects revealed interesting features about the combination of design challenges with techniques and technologies responsible for delivering the Zero Energy performance.
- Edifícios de balanço energético nulo: uma síntese das características principaisPublication . Aelenei, Daniel; Aelenei, Laura Elena; Goncalves, HelderOs edifícios de balanço energético nulo têm recebido uma atenção crescente desde a publicação da nova Directiva sobre o Desempenho Energético dos Edifícios em 2010 (EPBD, 2010). A nova EPBD, vai obrigar todos os edifícios novos construídos a partir de 2020 serem caracterizados por níveis mais elevados de desempenho energético, procurando explorar mais as fontes de energia renováveis disponíveis localmente numa base economicamente equilibrada e sem prejuízo para o conforto dos ocupantes. Para este fim, a partir 2020 todos os novos edifícios deverão ser caracterizados por um balanço energético “quase nulo”. Um edifício de balanço energético quase nulo, ou nearly-zero, refere-se a um edifício com necessidades energéticas muito baixas, devido à adopção de medidas de eficiência, em que as necessidades serão supridas por fontes renováveis de energia. De acordo com referências bibliográficas recentes, vários Estados-Membros da UE já definiram os seus objectivos nacionais com base nas exigências da nova EPBD, enquanto estratégias semelhantes são consideradas pelos governos dos EUA e do Japão (Yokoo, 2009). A partir de 2020, todos os novos edifícios serão caracterizados por um balanço energético positivo em França (ECEEE, 2011) ao passo que o governo Britânico aponta na direcção duma estratégia baseada num balanço em termos de emissões de CO2 nulo (zero-carbon) (DSLG, 2009). Ainda o governo dos EUA promove “casas comercializáveis” e edifícios não residenciais de balanço energético nulo a partir de 2020 e de 2025, respectivamente (DOE, 2008). Com cada vez mais países a apontar na direcção deste novo padrão, em todo o mundo são conhecidos a volta de 300 edifícios que alegam um desempenho energético nulo ou perto do nulo (Musall et al., 2010).
- Improving the Energy Performance of Public Buildings in the Mediterranean Climate via a Decision Support ToolPublication . Gouveia, João Pedro; Aelenei, Laura Elena; Aelenei, Daniel; Ourives, Raquel; Bessa, SaloméABSTRACT: Addressing Europe's decarbonisation challenge involves widespread deployment of nearly zero-energy buildings, deep energy renovations and renewable energy integration in the building sector. Enhancing energy efficiency in public buildings necessitates tailored solutions and strategic planning involving Local Public Administration. This work focuses on advancing insights into the application of the PrioritEE Decision Support Tool in Portuguese public buildings, highlighting the energy and financial savings and carbon dioxide emission reduction potential. Using detailed building characterisation data from energy performance certificates, we applied the tool across 22 public buildings of diverse typologies in three distinct regions of Portugal, representing various public entities. Results demonstrate the tool's adaptability, enabling a comprehensive assessment of energy performance and facilitating the exploration of customised energy efficiency and renewable energy solutions. The research emphasises the critical role of user-friendly tools in aiding policymakers and local administration technicians in meeting national renovation targets and contributing to the broader energy transition objectives.
- Introduction to analysis matrixPublication . Aelenei, Daniel; Aelenei, Laura Elena
- Investigating the potential for energy flexibility in an office building with a vertical BIPV and a PV roof systemPublication . Aelenei, Daniel; Lopes, Rui Amaral; Aelenei, Laura Elena; Goncalves, HelderABSTRACT: Building Integrated Photovoltaics (BIPV) are becoming an attractive solution in the context of high penetration of photovoltaics (PV) in buildings caused by the strive to achieve net or nearly zero energy status. Besides retrieving solar radiation to produce electricity, BIPV also offers aesthetical advantages because of its architectural feature. This paper reports on the electrical energy performance of a passive solar office building, Solar XXI, located in Lisbon, Portugal, which has installed on the South façade a BIPV (12 kWp) and an additional photovoltaic roof system in a nearby car park facility (12 kWp) for electricity generation. The main objective is to investigate the potential to increase load matching between energy generation and consumption and improve grid interaction for two scenarios using the energy flexibility enabled by the integration of Battery Energy Storage Systems (BESS) with capacities ranging from 13.5 kWh to 54 kWh. To collect the required results, real consumption and generation data are used, together with numerical simulations related to the integration of the BESS. The results show that load matching and grid interaction related metrics can be significantly improved by using the energy flexibility provided by a BESS and that the implementation of such system can be economically viable for a 10-year period.
- Mapping flexibility of urban energy systems (FIRST) project: rationale and study design of an exploratory projectPublication . Aelenei, Daniel; Lopes, Rui Amaral; Silva, Carlos; Costa, F.; Majdalani, N.; Simões, Teresa; Goncalves, Helder; Aelenei, Laura ElenaABSTRACT: With the publication of the new Energy Performance of Buildings Directive, a large number of buildings are expected to become high energy performance and explore more the availability of renewable energy resources. Such buildings are often described in literature as nearly Zero-Energy Buildings (nZEB). Because renewable energy sources, such as wind and solar power, have an intrinsic variability, the zero-energy annual balance of nZEBs is difficult to reach at short time resolution (e.g. hourly). Thus, since electricity generation from small-scale solar renewable (typical case in Portugal) in individual households has limited capacity to be adjusted according to the power system needs, it is relevant to consider the demand flexibility potential, specially at community level (cluster of buildings). Unfortunately, there is a lack of studies on the impact of changes in electricity use at urban level on the future energy systems. Therefore, an approach addressing the energy flexibility (EF) in buildings may allow obtaining useful exploratory directions for the construction sector and related markets, policy makers and regulatory bodies. For these reasons, an exploratory project aimed at examining the potential of EF at the level of an existent neighbourhood in Lisbon was initiated. In this article we describe the objectives, design, and methods of the FIRST project, designed to map out the potential for EF in terms of benefits and costs in Lisbon.