COMPARISON OF THE THERMAL CONDUCTIVITY OF FIQUE NON WOVEN MATERIALS USING TWO MEASURING TECHNIQUES

In this work, thermal conductivity was measured by two methods, the transient state method, and the steady-state method. The hot plate guard method (ASTM C177) was used to determine the thermal conductivity in steady-state and the thermal needle method (ASTM D5334) was used to determine the thermal conductivity in transient state. The thermal conductivity of fique nonwovens materials is calculated by using a semi-empirical approach based on the global thermal resistance concept. The influence the fique nonwovens density, frequency of strokes in thermal conductivity was studied, because density was one of the manufacturing parameters, that it was controlled during the preparation of sample by needle punching,where three levels of bulk density were used 50 kg/m3, 65 kg/m3 and 80 kg/m3.