Modified Dynamic Plane Source Method for Measuring Thermophysical Parameters of Solids

Abstract

The authors proposed and experimentally verified a new method of measurements of thermal conductivity and thermal diffusivity of homogeneous and isotropic materials with thermal conductivities of <2 W · m −1 · K −1 . The theoretical model and the experimental arrangement of the method, referred to as the modified dynamic plane source method, are described. The influence of the floating temperature of the heat sink was analyzed and included into the evaluation. The method was both theoretically and experimentally compared with other transient methods, namely, transient plane source and extended dynamic plane source methods. Two different polymethylmethacrylate materials were measured at laboratory temperature using all three methods, obtaining results with coefficients of variation of <2 % and 5 % for the thermal conductivity and thermal diffusivity, respectively. In addition, the sensor calibration and the sources of measurement uncertainty are outlined.Keywords Modified dynamic plane source method · Polymethylmethacrylate · Thermal conductivity · Thermal diffusivity · Transient plane source method

Applying the EDPS Method to the Research into Thermophysical Properties of Solid Wood of Coniferous Trees

“…Extended dynamic plane source method ( Figure 1) is one of the dynamic methods with heat gradually supplied, while one-dimensional conduction heat transfer is formed. e DPS method is modified in order to measure the properties of slow-conducting materials with the value of thermal conductivity of λ ≤ 2 W·m −1 ·K −1 [36,37]. Resistance sheet operates as a heat source and the temperature sensor (by measuring the changes in electrical resistance).…”

On Experimental Thermal Analysis of Solid Materials

“…Relation among k, c p and α has the form as in (12) p k c = ⋅ ⋅ α ρ (12) where k is sample thermal conductivity, α is diffusivity, c p, is specific heat capacity and ρ is the sample density.…”

“…The so-called flash method has a large spectrum of realizations [8]- [11]. Different contact impulse methods with different position of the heat source were described in [11]- [12]. The heat sources in this case usually have a meander shape.…”

On the solid state heat transport phenomena measurement

“…The fundamental theoretical work in this sense is [8]. The so-called flash method has a large spectrum of realizations [9][10][11][12]. Different contact impulse methods with different position of the heat source were described in [12,13].…”