Estudo acerca das variações sazonais da condutividade térmica

The conductivity study was monitored in the period of un year. In order to do that, the measurements were performed on samples collected monthly, at 5,0cm depth. The selected site is representative of sandy. The moisture content of the collected samples changed significantly, that may be attributed to the seasonal variation of the local pluviometric precipitation. The thermal conductivities of the sandy samples varied from 0,12 to 2,38 W/m.oC, with an average value of 0,78 ± 0,57 W/m.oC. The variability observed from the above results indicates that the thermal conductivity values of materials existing in the aeration zone were significantly altered by physical variables. The thermal conductivity changes significantly between its extreme values, measured on field samples at natural conditions. The precautions should be taken when uses thermal conductivity values, for estimates in shallow geothermics.