EAC - Comunicações em actas de encontros científicos internacionais
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Browsing EAC - Comunicações em actas de encontros científicos internacionais by Author "Aelenei, Laura Elena"
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- BIPV/T versus BIPV/T-PCM: A numerical investigation of advanced system integrated into Solar XXI building façadePublication . Aelenei, Laura Elena; Pereira, R.; Goncalves, Helder
- 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 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.
- Designing adaptive facades with a new holistic eco-design approachPublication . Vedula, Nitisha; Aelenei, Laura Elena; Pottgiesser, UtaABSTRACT: Implementing the Eco-designed approach in the field of adaptive façade systems, primarily aims for the future sustainable targets to develop eco-friendly and socio-responsive technologies. This will be only possible when the adaptive façade systems track design strategies endeavouring to imitate the philosophy of “the self-sufficient unit in the nature called eco-system.” With the understanding of the future sustainable targets of adaptive systems and analysing its sustainably efficient elements with the help of already existing and scattered classification schemes from the data base developed within the work of the Cost Action TU 1403 Adaptive Façade Network (AFN), this approach attempts to develop a novel matrix for re-analysing these adaptive façade projects with an eco-design approach. The aim of this approach is to examine whether these adaptive façade projects from the data base are able to seamlessly integrate themselves in this approach and to what extent. The eco-design approach on the basis of the contiguous natural environment (i.e. location and climate type), conceives the adaptive façade projects as a unit-cell in the eco-system, which should naturally attempt to be a self-sufficient unit. Understanding this approach, the various principles of the adaptive façade systems in the projects from the database are analysed. This leads to characterizing the approach in a matrix of the biotic components of eco-system (producers, consumers and decomposers) and abiotic components of ecosystem (air, soil, water, temperature, pressure, inorganic substances, etc.). These two components work collectively due to the naturally occurring energy transfer principles in amidst, known as conduction, indirect-solar, direct-solar and ventilation. The matrix also further characterizes the biotic components into active and passive systems, in order to avoid any error in analysing both, the direct and in-direct influences of the adaptive façade systems inside the project. The eco-design approach attempts to thoroughly analyse the extent of integration of this approach in the field of adaptive façade systems and to apprehend the further scope of research and development for the related industry.
- Energia solar no ambiente urbano: caso de estudo, desafios, abordagens e investigaçãoPublication . Viana, Susana; Simões, Teresa; Aelenei, Laura Elena; Justino, Paulo AlexandreRESUMO: O Município de Cascais tem vindo a empenhar-se na mitigação das alterações climáticas, na proteção do ambiente e renaturalização de florestas e espaços verdes, no aumento da recolha seletiva e melhoria de processos de tratamento de resíduos, na melhoria da mobilidade, apostando na mobilidade suave combinada com zonas intermodais de ligação a transportes públicos, como os comboios e a rede gratuita de autocarros municipais (Mobi Cascais) para residentes, trabalhadores e estudantes. Como forma de diminuir a sua pegada de carbono, o município pretende ainda apostar na geração de energia a partir de fontes renováveis, nomeadamente na integração de energia solar fotovoltaica em edifícios públicos e em edifícios geridos pela autarquia. Para atingir estes objetivos Cascais tornou-se um caso de estudo em dois projetos europeus, Re-Value e WeGenerate.
- Energy saving potential of a hybrid BIPV-T system integrated with heat storage materialPublication . Aelenei, Laura Elena; Pereira, R.; Goncalves, Helder; Silva, António Rocha e
- Modelling and experimenting thermal energy storage through the use of PCM in low thermal inertia officePublication . Abreu, Duarte Drumond de; Neto, Rui C.; Aelenei, Laura Elena; Siva, CarlosABSTRACT: Within the scope of this thesis, thirty DuPont Energain thermal mass boards were tested inside a shipping container located in Oeiras, Portugal. These phase change material (PCM) boards have a 21.7 °C melting point and they were experimented during August (Summer) as internal mass due to a structure specifically designed for this project. Results showed that these latent heat storage systems induced an indoor peak temperatures shift of three hours and a slight indoor temperatures reduction. An EnergyPlus model was validated using measured data and several parametric studies were made using this model. In this case, it was found that the best solution for this low thermal inertia enclosure was incorporating forty eight panels with 10 mm of thickness and a melting point of 20 °C. Although these panels have a payback period of thirty two years, in the future it can fall into a more acceptable value of five years.
- Passive adaptive façades : examples from COST TU1403 working group 1Publication . Mazzucchelli, Enrico Sergio; Aelenei, Laura Elena; Gomes, Maria da Glória; Karlessi, Theoni; Alston, Mark; Aelenei, DanielABSTRACT: Buildings often adopt strategies based on the integration of solutions and technologies in façades capable of changing their behaviour in time to improve energy efficiency and comfort. Considering that the envelope is the main parameter that influences the energy performance of buildings, façade elements with adaptive features can provide the buildings the necessary flexibility needed in terms of energy flow and thermal comfort in the context of nZEB, where the buildings must be interactive in the zero energy and smart city context. Several different types of adaptive façade concepts have already been developed, and an increase in emerging, innovative solutions is expected in the near future. However, when referring to adaptive technologies, two main categories can be distinguished. Adaptive technologies, which rely on passive design to improve building energy efficiency and comfort, and active technologies which include renewable harvesting. The aim of this paper is to provide several examples of passive adaptive technologies and their performance features from COST TU1403 Working Group 1 database.
- Standard Unretrofitted Buildings and Net Zero-Energy ConceptPublication . Aelenei, Daniel; Aelenei, Laura Elena; Santos, M.C. da CostaThere are many different possible combinations of building envelope, utility equipments and onsite energy generation equipments that can lead to net zero-energy performance. For instance, a building with standard design can offset its energy demand by adding a large amount of photovoltaic cells or by improving its energy efficiency rating first and then adding a smaller amount of photovoltaic cells. Despite the second strategy being considered the roadmap to net zeroenergy status, the first scenario is also possible in the actual Portuguese context where laws favor conditions for the installation of PV´s and solar thermal systems. This paper intends to discuss the implications of this fact from a national perspective coupled with the IEA SHC Task 40 - ECBCS Annex 52 vision where authors are active participants.
- The nZEBs in the near Future: Overview of definitions and guidelines towards existing plans for increasing nZEBsPublication . Aelenei, Laura Elena; Goncalves, Helder; Aelenei, DanielZero-energy performance buildings have gained significant attention since the publication in 2010 of the recast of the EPBD recast which requires all new buildings to become nearly zero-energy by 2020. Buildings are requested to meet higher levels of energy performance and to explore more the alternative energy supply systems available locally on a cost-efficiency basis. Since the directive does not specify minimum or maximum harmonized requirements as well as details of energy performance calculation framework, it is up to the member states to define the exact meaning of “high energy performance” and “amount of energy from renewable sources” according to their own local conditions and strategic interests. Nearly zero-energy building (nZEB) performance derives from net zero-energy concept (Net ZEB) which in case of buildings is usually defined as a high energy performance building that over a year is energy neutral. The successful implementation of such an ambitious target, however, needs to be planned out diligently. The critical steps are a) a correct picture about the existing state and trends, b) clear definitions and targets, c) dynamic building codes and energy efficient technologies and d) rules for testing and verification. The nZEBs or NetZEBs built in the near future therefore may play a critical role in implementing any ambitious plan as its success on long-term relies on setting best practice examples, in addition of the supporting policies and initiatives. The purpose of this paper is to review existing definitions, terms and policies on strategic planning of nZEBs at national and international level.