The key role of the building envelope in achieving building energy efficiency and indoor comfort for the user has been long established.The most promising-and innovative-strategy for the building envelope of the futur...The key role of the building envelope in achieving building energy efficiency and indoor comfort for the user has been long established.The most promising-and innovative-strategy for the building envelope of the future is based on a dynamic,active and integrated solution,that is able to optimize the thermal performance,integrate the active elements and systems,and exploit energy from renewable sources.This paper illustrates the most relevant results of a decade-long research activity carried out on active and integrated building envelopes at the Politecnico di Torino,in which numerical analyses and experimental campaigns,involving test cells and field monitoring,have been performed.The overall performances of different façade modules and the thermo-physical behaviour of various components,under different operating strategies,are presented and discussed.The analysis provides information on the contribution of each subsystem,e.g.glazing,sun-shading devices,natural and mechanical ventilation,...to the achieved energy efficiency and the overall performances of different typologies of Double-Skin Façades(DSFs)and Advanced Integrated Façades(AIFs).展开更多
The adoption of Phase Change Materials （PCMs） in glazing systems was proposed to increase the heat capacity of the fenestration, being some PCMs partialty transparent to visible radiation. The aim of the PCM glazing...The adoption of Phase Change Materials （PCMs） in glazing systems was proposed to increase the heat capacity of the fenestration, being some PCMs partialty transparent to visible radiation. The aim of the PCM glazing concept was to let （part） of the visible spectrum of the solar radiation enter the indoor environment, providing daylighting, while absorbing （the largest part of） the infrared radiation. In this paper, the influence of the PCM glazing configuration is investigated by means of numerical simulations carried out with a validated numerical model. Various triple glazing configurations, where one of the two cavities is fitled with a PCM, are simulated, and PCM melting temperatures are investigated. The investigation is carried out in a humid subtropical climate （Cfa according to K6ppen climate classifi-cation）, and ＂typical days＂ for each season are used. The results show that the position of the PCM layer （inside the outer or the inner cavity） has a retevant influence on the thermo-physical behaviour of the PCM glazing system. PCM glazing systems （especially those with the PCM layer inside the outermost cavity） can be beneficial in terms of thermal comfort. The assessment of the energy performance and efficiency is insteadmore complex and sometimes controversial. All the configurations are able to reduce the solar glain during the daytime, but sometimes the behaviour of the PCM glazing is tess efficient than the reference one.展开更多
文摘The key role of the building envelope in achieving building energy efficiency and indoor comfort for the user has been long established.The most promising-and innovative-strategy for the building envelope of the future is based on a dynamic,active and integrated solution,that is able to optimize the thermal performance,integrate the active elements and systems,and exploit energy from renewable sources.This paper illustrates the most relevant results of a decade-long research activity carried out on active and integrated building envelopes at the Politecnico di Torino,in which numerical analyses and experimental campaigns,involving test cells and field monitoring,have been performed.The overall performances of different façade modules and the thermo-physical behaviour of various components,under different operating strategies,are presented and discussed.The analysis provides information on the contribution of each subsystem,e.g.glazing,sun-shading devices,natural and mechanical ventilation,...to the achieved energy efficiency and the overall performances of different typologies of Double-Skin Façades(DSFs)and Advanced Integrated Façades(AIFs).
文摘The adoption of Phase Change Materials （PCMs） in glazing systems was proposed to increase the heat capacity of the fenestration, being some PCMs partialty transparent to visible radiation. The aim of the PCM glazing concept was to let （part） of the visible spectrum of the solar radiation enter the indoor environment, providing daylighting, while absorbing （the largest part of） the infrared radiation. In this paper, the influence of the PCM glazing configuration is investigated by means of numerical simulations carried out with a validated numerical model. Various triple glazing configurations, where one of the two cavities is fitled with a PCM, are simulated, and PCM melting temperatures are investigated. The investigation is carried out in a humid subtropical climate （Cfa according to K6ppen climate classifi-cation）, and ＂typical days＂ for each season are used. The results show that the position of the PCM layer （inside the outer or the inner cavity） has a retevant influence on the thermo-physical behaviour of the PCM glazing system. PCM glazing systems （especially those with the PCM layer inside the outermost cavity） can be beneficial in terms of thermal comfort. The assessment of the energy performance and efficiency is insteadmore complex and sometimes controversial. All the configurations are able to reduce the solar glain during the daytime, but sometimes the behaviour of the PCM glazing is tess efficient than the reference one.
