The need to reduce buildings energy consumption comes along with the increasing demand for a higher thermo-hygrometric and visual well-being added to the well-being concept, which is subjective as it varies according to the users and to the activities that they carry out, has to be added to. The market has responded to these needs through the development of dynamic envelope components, that are able to change their performances in response to specific contingencies. Their high performances are granted not only by their morphology and composition, but mainly by the control strategies that regulate their behaviour. The test carried out by ITC-CNR has compared the performance in real operating conditions of a traditional window and that of an electrochromic glass. With the aid of specific experimental testing facilities, which have been conveniently calibrated and monitored, the most important thermo-hygrometric and visual well-being indexes have been detected, and the energy consumption for the room heating and cooling has been calculated. The electrochromic glass control system has been modified on the basis of the obtained results, in order to improve its performance and to reach the maximum levels of both energy saving and internal well-being.
La necessità di ridurre i consumi energetici degli edifici è accompagnata dalla crescente esigenza di un maggior benessere termo-igrometrico e visivo: a questo si aggiunge la soggettività del concetto di benessere, che varia in funzione degli utenti e delle attività che svolgono. La risposta del mercato a queste necessità è stata quella di sviluppare componenti di involucro dinamici, in grado di variare le loro prestazioni in funzione di specifiche contingenze. Le loro elevate prestazioni sono garantite non solo dalla loro morfologia e composizione, ma anche e soprattutto dalle logiche di controllo che ne regolano il funzionamento. La sperimentazione condotta da ITC-CNR ha posto a confronto le prestazioni nelle reali condizioni di funzionamento di un serramento tradizionale e di un vetro elettrocromico. Con l'ausilio di specifici assetti sperimentali opportunamente calibrati e monitorati, sono stati rilevati in continuo i principali indicatori di benessere termo-igrometrico e visivo e i consumi per la climatizzazione degli ambienti. In funzione dei risultati ottenuti sono state modificate le logiche di controllo del vetro elettrocromico al fine di migliorarne le prestazioni e garantire contemporaneamente il massimo benessere e risparmio energetico.
Development of a dynamic envelope system with electro-chromic grazing
Stefano Galli;Alice Bellazzi
2012
Abstract
The need to reduce buildings energy consumption comes along with the increasing demand for a higher thermo-hygrometric and visual well-being added to the well-being concept, which is subjective as it varies according to the users and to the activities that they carry out, has to be added to. The market has responded to these needs through the development of dynamic envelope components, that are able to change their performances in response to specific contingencies. Their high performances are granted not only by their morphology and composition, but mainly by the control strategies that regulate their behaviour. The test carried out by ITC-CNR has compared the performance in real operating conditions of a traditional window and that of an electrochromic glass. With the aid of specific experimental testing facilities, which have been conveniently calibrated and monitored, the most important thermo-hygrometric and visual well-being indexes have been detected, and the energy consumption for the room heating and cooling has been calculated. The electrochromic glass control system has been modified on the basis of the obtained results, in order to improve its performance and to reach the maximum levels of both energy saving and internal well-being.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


