This paper will focus on the the definition and effect of different weather data and virtual environment scripts for thermal shock assessment of curtain walling. In particular, it is proposed a general method for thermal breakage evaluation, which takes into account the actual location, geometry and characteristics of each particular glass pane considered. The analyses are based on real design case studies from Giugiaro Architettura and Structures company, for the city of Monaco, France. Once having validated the weather data for the last 15 years from MERRA5 satellitebased source, it will be created, through a spreadsheet, the eXtreme Reference Year data set to use for thermal shock assessment; then it will be individuated the glass pane on the façade which is most exposed to solar radiation, and, through a virtual environment software, the worst cases for the thermal breakage of it. Again through the same V.E. software, for each worst case individuated, a deeper solar radiation analysis will be carried out on the I.G.U., in order to find the boundary conditions to use in the further passages, i.e. the analyses of the façade details through a Finite Element software, in order to find the maximum and minimum temperatures in the glass panes, and thus have the values of temperature differences for thermal shock assessment. The target of this thesis is to propose a general method for the evaluation of thermal shock in glass façades’ elements, in order to go beyond the limits that in some cases are present in the standards. The calculations will be always verified and implemented through the spreadsheet.
Questa tesi si concentrerà sulla definizione e sull’effetto di dati climatici diversi e di diversi ambienti virtuali di simulazione per la valutazione dello shock termico delle facciate continue. In particolare, viene proposto un metodo generale per la valuatione della rottura termica dei vetri, che consideri i reali luogo, geometria e caratteristiche del panello di vetro considerato. Le analisi sono basate su casi di studio reali della azienda Giugiaro Architettura and Structures, per la città di Monaco, Francia. Una volta validati i dati climatici per gli ultimi 15 anni provenienti dal satellite MERRA5, verrà creato, tramite un foglio di calcolo, l’anno estremo di riferimento (XRY) da usare per la valutazione dello shock termico. In seguito, verrà individuato il pannello vetrato più esposto alla radiazione solare in facciata, e, tramite un software di simulazione, verranno individuati i casi peggiori per lo shock termico di questo. Ancora con lo stesso Virtual Environment software, per lo stesso pannello individuato, una analisi più approfondita di radiazione solare verrà svolta sulla I.G.U., in modo da trovare le condizioni al contorno da usare nei passaggi successivi, cioè l’analisi della facciata tramite un software ad Elementi Finiti, per trovare le temperature massima e minima nel vetro ed ottenere così le differenze di temperatura per la valutazione dello shock termico. L’obiettivo della tesi è quello di proporre un metodo generale per la valutazione dello shock termico degli elementi vetrati delle facciate, in modo da superare i limiti che, in alcuni casi, sono presenti nelle normative. I calcoli saranno sempre verificati e implementati con il foglio di calcolo.
Glass facades, proposal for a general method for thermal shock assessment based on weather data analysis and virtual environment simulations
MARCHESINI, FABIO
2018/2019
Abstract
This paper will focus on the the definition and effect of different weather data and virtual environment scripts for thermal shock assessment of curtain walling. In particular, it is proposed a general method for thermal breakage evaluation, which takes into account the actual location, geometry and characteristics of each particular glass pane considered. The analyses are based on real design case studies from Giugiaro Architettura and Structures company, for the city of Monaco, France. Once having validated the weather data for the last 15 years from MERRA5 satellitebased source, it will be created, through a spreadsheet, the eXtreme Reference Year data set to use for thermal shock assessment; then it will be individuated the glass pane on the façade which is most exposed to solar radiation, and, through a virtual environment software, the worst cases for the thermal breakage of it. Again through the same V.E. software, for each worst case individuated, a deeper solar radiation analysis will be carried out on the I.G.U., in order to find the boundary conditions to use in the further passages, i.e. the analyses of the façade details through a Finite Element software, in order to find the maximum and minimum temperatures in the glass panes, and thus have the values of temperature differences for thermal shock assessment. The target of this thesis is to propose a general method for the evaluation of thermal shock in glass façades’ elements, in order to go beyond the limits that in some cases are present in the standards. The calculations will be always verified and implemented through the spreadsheet.File | Dimensione | Formato | |
---|---|---|---|
2019_10_Marchesini.pdf
non accessibile
Descrizione: Testo della tesi
Dimensione
49.02 MB
Formato
Adobe PDF
|
49.02 MB | Adobe PDF | Visualizza/Apri |
I documenti in POLITesi sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/10589/150359