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- The use of key enabling technologies in the nearly zero energy buildings monitoring, control and intelligent managementPublication . Lourenço, José Marco; Aelenei, Laura Elena; Facão, Jorge; Goncalves, Helder; Aelenei, Daniel; Pina, João MurtaABSTRACT: The 2018 revision of the European Performance Building Directive (EPBD) requires that from the year 2020 onwards, all new buildings will have to be "nearly zero energy buildings". It also further promotes smart building technologies, raising awareness amongst building owners and occupants of the value behind building automation. The European Commission also identified, in 2011, Key Enabling Technologies (KETs), which provide the basis for innovation in the EU. In the frame of the SUDOKET project, the Solar XXI building was used as a pilot case, as innovative integrated solutions and technologies are monitored and controlled. The objective of this paper is to validate a simulation of the laboratorial test room in EnergyPlus with data obtained experimentally and determine the impact of the control systems on energy needs and on thermal comfort. Two systems, in particular, were studied: the Building-Integrated Photovoltaic (BIPV) and the earth tubes. Once validated, the simulation of the test room without the systems was created, allowing their impact to be determined. The results show that, for the analysed periods, BIPVs reduced the heating consumption by 22% while also increasing thermal comfort, and the earth tube system would reduce the cooling needs by 97%.
- Thermal behavior of a BIPV combined with water storage: an experimental analysisPublication . Lourenço, José Marco; Aelenei, Laura Elena; Sousa, Miguel; Facão, Jorge; Goncalves, HelderABSTRACT: Buildings play an active role in the global energy consumption and are required to not only minimize their energy use, but also generate energy in a sustainable manner. The integration of renewable energies in building elements can improve their overall performance, as they are able to replace common construction materials, while offering both electrical and thermal energy. The scope of this paper is to present the first results of an experimental study of a Building-Integrated Photovoltaic system combined with a water storage tank (BIPV-WS), a combined integration not extensively studied yet. Both layers are separated by a ventilated air cavity, and the thermal behavior of the system was analyzed experimentally in real functioning conditions. The water tank performs as a thermal storage, maintaining a regular temperature of about 20-30 degrees C during a typical winter day of Lisbon for a period of 11 h. Moreover, through the ventilation of the air cavity, the heat provided by the solar panel was naturally recovered to the indoors of the building, while keeping the temperature high enough to heat up the water. During summer, the ventilated BIPV-WS enabled beneficial nocturnal heat loss while delaying diurnal space heating.
- 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.