Analysis of Low-Density Heat Flux Data by the Wavelet Method

When evaluating the energy efficiency of buildings and implementing necessary measures to increase levels, thermal technical characteristics are determined. For this purpose, in situ measurements resistance external enclosing structures were carried out. One methods most often used by researchers is non-destructive method—the heat flow meter (HFM) method regulated ISO 9869. In case surveying a building with high level resistance, faced low-density flux measurements, which always difficult task due significant fluctuations influence factors on measurement results. This fact that it determine what useful signal consequence effects non-stationarity transfer conditions. The article provides an example when determining proposes data pre-processing procedure allows for reduction fluctuations, has impact final result at low density. proposed use wavelet analysis makes possible reconstruct them or reduce disturbances occur during research. A comparison obtained results calculation according 9869-1 showed decrease standard deviation from 5.74 2.81%. study can be noise and, as result, applying HFM structures.