مرکز منطقه ای اطلاع رساني علوم و فناوري - DETERMINATION OF THERMAL CONDUCTIVITY OF CLASSICAL INSULATION MATERIALS BY HEAT FLOW METER AND TRANSIENT PLANE SOURCE TECHNIQUE

Abstract :

At the present time, insulation of residential and industrial buildings is extremely important in terms of energy saving, efficiency, comfort conditions and reduction of greenhouse gas emissions. Determination of the building thermal loads due to the changing climate conditions throughout the year in our country and necessary thermal insulation is necessary in terms of effective use of energy. This situation makes it possible to work on the efficient use of energy. In particular, intensive research activities have been initiated for low energy buildings and heat insulation has become compulsory with standards. The calculation of the thermal resistance (R) values used in the design of building walls and roofs strongly depends on the thermal conductivity coefficient k (W/mK) of the insulation materials. Besides, it is also extremely necessary to determine the other thermal properties of the insulation material (thermal diffusivity, specific heat). In this study, the thermal properties of classical insulation materials were determined by two different methods. Firstly, the thermal conductivities were determined by means of the Heat Flow Meter which can measure according to the ISO 8301 protocol. The measurements were then repeated for the same samples using the Transient Plane Source technique. All measurements were made at 20 °C and the results of two different methods were examined. The obtained thermal conductivity (k), thermal diffusivity (α), specific heat (cp) and density (ρ) are presented in a systematic way. The results showed that the values measured by TPS method had the same tendency as the values measured by HFM method. Thus, it has been determined how the variable parameters (thermal power and time) of the TPS method affect the thermal properties.