The Energy Performance of Buildings Directive requires all new buildings to be nearly zero-energy by the end of 2020. All new public buildings must be nearly zero-energy by 2018. Nearly zero-energy buildings (NZEBs) have very high energy performance, in addition, the low amount of energy that these buildings require comes mostly from renewable sources. Lombardy has been the first region to receipt the European Directive and actuate its instructions regarding Nearly zero-energy buildings. The d.g.r. 3868 has confirmed the becoming in law of the requirements for NZebs and the D.M. 26/06/2015 has given the methodology for the satisfaction of the requirements. Given this framework, this dissertation is focused on the analysis of an existent non-residential building, located in Lecco (Lombardy), belonging to the Opera Don Guanella Servants of Charity. The building has been transformed into a day-care centre for disabled people. Different envelope systems and the possible passive design strategies to adopt have been taken into account in order to optimize the building energy and daylighting performance. The optimization of the building energy need for space conditioning has been done trying to take the most advantage of the resources offered by the external natural environment. The results of the analysis, the envelope solutions and the strategies identified as most suitable to implement will serve as guidelines to the designer for an eventual refurbishment project of the building. In this dissertation work a step by step methodology has been followed and with the analysis section has been performed with the use of IES VE software. All the solutions applied, starting from the envelope systems chosen, passing through the passive cooling strategies identified as the most effective ones and the solar shading devices selected on the base of the daylighting analysis results, have allowed to reach a satisfactory reduction of the energy need for heating and cooling. The lowering has been such that, in case of an eventual use of an air-water HVAC system and a high efficiency heating and cooling generation system, together with the implementation of photovoltaic panels, the total energy required for space conditioning can be satisfied by the renewable energy provided by the PV panels.
La DIRETTIVA 2010/31/UE del Parlamento Europeo e del Consiglio del 19 maggio 2010 sulla prestazione energetica nell’edilizia richiede che tutti i nuovi edifici siano Nzeb entro la fine del 2020. Tutti i nuovi edifici pubblici devono esserlo per il 2018. La regione Lombardia è stata la prima regione a recepire la Direttiva Europea e ad attuare le sua istruzioni a proposito dei Nearly zero-energy buildings. Il d.g.r. 3868 ha confermato l’entrata in vigore di requisiti per gli Nzebs e il D.M. 26/06/2015 ha fornito la metodologia per la soddisfazione di tali requisiti. Data questa premessa, la tesi si focalizza sull’analisis di un edificio non residenziale, sito a Lecco, appartenente all’opera Don Guanella. L’edificio è stato trasformato in un centro diurno per disabili e sono stati presi in considerazione diverse soluzioni di involucro e le possibili strategie di raffrescamento passivo da adottare per identificare soluzioni ottimali al fine di migliorare la performance energetica e luminosa dell’edificio. Il lavoro è stato svoolto con una metodologia “step by step” e attraverso l’uso de softare IES VE. Tutte le soluzioni applicate, iniziando dai suistemi di involucro scelti, passondo per le strategie più efficaci di raffrescamento passivo e le schermature solari, scelte in base ai risultati dell’analisi luminosa, hanno permesso di raggiungere una riduzione soddisfacente del fabbisogno energetico per il riscaldamento ed il raffrescamento. La riduzione è stat tale che in caso di un eventuale uso di un impianto di climatizzazione ad aria primaria e di un sistema di generazione ad alta efficienza, insieme all’implementazione di pannelli fotovoltaici, l’energia totale richiesta per la climatizzazione può essere soddisfatta dall’energia rinnovabile fornita dai pannelli fotovoltaici.
Study of the envelope of an existing non-residential building in Lecco and identification of optimal solutions considering the energetic and daylighting performance
EL HOKAYEM, ANGELICA
2016/2017
Abstract
The Energy Performance of Buildings Directive requires all new buildings to be nearly zero-energy by the end of 2020. All new public buildings must be nearly zero-energy by 2018. Nearly zero-energy buildings (NZEBs) have very high energy performance, in addition, the low amount of energy that these buildings require comes mostly from renewable sources. Lombardy has been the first region to receipt the European Directive and actuate its instructions regarding Nearly zero-energy buildings. The d.g.r. 3868 has confirmed the becoming in law of the requirements for NZebs and the D.M. 26/06/2015 has given the methodology for the satisfaction of the requirements. Given this framework, this dissertation is focused on the analysis of an existent non-residential building, located in Lecco (Lombardy), belonging to the Opera Don Guanella Servants of Charity. The building has been transformed into a day-care centre for disabled people. Different envelope systems and the possible passive design strategies to adopt have been taken into account in order to optimize the building energy and daylighting performance. The optimization of the building energy need for space conditioning has been done trying to take the most advantage of the resources offered by the external natural environment. The results of the analysis, the envelope solutions and the strategies identified as most suitable to implement will serve as guidelines to the designer for an eventual refurbishment project of the building. In this dissertation work a step by step methodology has been followed and with the analysis section has been performed with the use of IES VE software. All the solutions applied, starting from the envelope systems chosen, passing through the passive cooling strategies identified as the most effective ones and the solar shading devices selected on the base of the daylighting analysis results, have allowed to reach a satisfactory reduction of the energy need for heating and cooling. The lowering has been such that, in case of an eventual use of an air-water HVAC system and a high efficiency heating and cooling generation system, together with the implementation of photovoltaic panels, the total energy required for space conditioning can be satisfied by the renewable energy provided by the PV panels.| File | Dimensione | Formato | |
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2018_04_ElHokayem_01.PDF.pdf
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Descrizione: Testo Tesi
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2018_04_ElHokayem_02.PDF.PDF
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Descrizione: Book Tavole Tesi
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https://hdl.handle.net/10589/140487