Active Thermal Method Applied to the In Situ Characterization of Insulating Materials in a Wall

An in situ estimation of the thermal properties bio-sourced building wall insulation components is critical importance improving both energy efficiency buildings and development construction materials with a smaller environmental footprint. Depending on weather conditions, passive methods are not always feasible; they require time to conduct lengthy testing may lead significant uncertainties. This article presents an active method based power dissipation via flat electrical resistance. The can be implemented regardless outdoor conditions suitable for walls high overall resistance which small average component through flow difficult estimate. Measurements conducted input flows temperatures. inverse method, derived from finite difference model 1D transfers along multi-objective approach, enables characteristics two-material assembly identified. A was chosen solve problems correlation between parameters model. However, requires use two temperature sensors integrated inside wall. Following laboratory validation phase PVC/plasterboard assembly, actual coating/hemp concrete also characterized as part this work program. conductivity hemp block estimated at 0.12 W m−1 K−1 consistent values found literature.