Analytical modelling of Breathing Walls: experimental verification by means of the Dual Air Vented Thermal Box lab facility. (December 2017)

• Record Type: Journal Article
• Authors: Alongi, Andrea; Angelotti, Adriana; Mazzarella, Livio
• Is Part Of: Energy procedia. Volume 140(2017)
• Page Start: 36
• Page End: 47
• Publication Date: 2017-12
• Subjects: dynamic insulation -- breathing wall -- porous materials -- experimental validation -- laboratory facility; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.11.121
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: Breathing Walls are air permeable envelope components based on porous materials. In contra-flux operation air flows opposite to conductive flux, while in pro-flux they have the same direction. The Breathing Wall behaves either as a ventilation heat exchanger or as an active insulation. In literature an analytical model describing steady state heat transfer across a Breathing Wall can be found. Since it lacks an exhaustive experimental validation, a facility developed at the Energy Department of Politecnico of Milano was used to investigate the thermo-physical behavior of a no-fines concrete based Breathing Wall in steady state Dirichlet conditions and contra-flux operation.