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Publication
Solar XXI: A Portuguese Office Building towards Net Zero-Energy Building
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Advisor(s)
Abstract(s)
Solar Building XXI, built in 2006, at LNEG Campus in Lisbon, pretends to be an example of a low energy building using passive systems both for heating and cooling (ground cooling) towards a Net Zero-Energy Building (NZEB). The main façade has a PV system with heat recovery which assists the heating in winter time. In summer a ground cooling system (earth tubes)is used to cool the building, together with night cooling strategies. Net Zero-Energy Buildings Performance has gained more attention since the publication in 2010 of the EPBD recast. Successful implementation of such an ambitious target depends on a great variety of factors. For designers and code writers these include: balancing climate driven-demand for space cooling and heating with climate-driven supply for renewable energy resources.
With a literature full of theoretical advice and a building industry rife with myths about the value of technologies,the present paper intends to unveil a sustainable
framework for sharing insights into NZEB methodology applied to a Portuguese solar office building, SOLAR XXI, currently underway to reach the Net Zero-Energy Goal. Under the common work which is developed also
in SHC Task 40-ECBCS Annex 52, “Towards Net Zero Solar Energy Buildings”, the authors of this paper are currently engaged in studying possible strategies for “upgrading” Solar XXI to NZEB status.
Description
Keywords
Edifício Energia Zero Edifício Solar XXI Edifício Serviços Eficiência energética
Citation
Gonçaves, H.; Aelenei, L.; Rodrigues, C. Solar XXI: A Portuguese Office Building towards Net Zero-Energy Building. In: The REHVA European HVAC Journal, vol. 49, nº 3, 2012, p. 34-40