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On the effects of variation of thermal conductivity in buildings in the Italian construction sector

handle: 2108/356367 , 11573/1099871 , 11589/262667 , 11585/634125
Stationary and dynamic heat and mass transfer analyses of building components are an essential part of energy efficient design of new and retrofitted buildings. Generally, a single constant thermal conductivity value is assumed for each material layer in construction components. However, the variability of thermal conductivity may depend on many factors; temperature and moisture content are among the most relevant ones. A linear temperature dependence of thermal conductivity has been found experimentally for materials made of inorganic fibers such as rockwool or fiberglass, showing lower thermal conductivities at lower temperatures. On the contrary, a nonlinear temperature dependence has been found for foamed insulation materials like polyisocyanurate, with a significant deviation from linear behavior. For this reason, thermal conductivity assumptions used in thermal calculations of construction components and in whole-building performance simulations have to be critically questioned. This study aims to evaluate how temperature affects thermal conductivity of materials in building components such as exterior walls and flat roofs in different climate conditions. Therefore, experimental conductivities measured for four common insulation materials have been used as a basis to simulate the behavior of typical construction components in three different Italian climate conditions, corresponding to the cities of Turin, Rome, and Palermo
- Alma Mater Studiorum University of Bologna Italy
- Ryerson University Canada
- Ryerson University Canada
- Polytechnic University of Bari Italy
- Delft University of Technology Netherlands
690, Technology, high-performance buildings, Buildings -- Performance, Materials -- Thermal properties, Insulation (Heat), thermal conductivity, temperature dependence, Uncategorized content, insulation materials; thermal conductivity; building energy consumption; temperature dependence; high performance buildings, T, Settore ING-IND/11, 621, building energy consumption, Buildings -- Energy conservation, 620, Sustainable buildings -- Design and construction, Building energy consumption; High-performance buildings; Insulation materials; Temperature dependence; Thermal conductivity, Thermal conductivity, high performance buildings, insulation materials; thermal conductivity; building energy consumption; temperature dependence; high-performance buildings, insulation materials
690, Technology, high-performance buildings, Buildings -- Performance, Materials -- Thermal properties, Insulation (Heat), thermal conductivity, temperature dependence, Uncategorized content, insulation materials; thermal conductivity; building energy consumption; temperature dependence; high performance buildings, T, Settore ING-IND/11, 621, building energy consumption, Buildings -- Energy conservation, 620, Sustainable buildings -- Design and construction, Building energy consumption; High-performance buildings; Insulation materials; Temperature dependence; Thermal conductivity, Thermal conductivity, high performance buildings, insulation materials; thermal conductivity; building energy consumption; temperature dependence; high-performance buildings, insulation materials
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).58 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Top 10% impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 1% visibility views 16 download downloads 11 - 16views11downloads
Data source Views Downloads TU Delft Repository 16 11


