Improvements in the Dynamic Plane Source Method

Malinarič, Svetozár; Dieška, Peter

doi:10.1007/s10765-008-0525-7

Cited by 11 publications

(9 citation statements)

References 8 publications

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“…The thermal parameters were measured using thermal analyser Isomet 2104 (Applied Precision Ltd., Slovakia) and a surface probe with a measuring range of 0.04-0.3 W m -1 K -1 . The measurement procedure is based on the DPS method described by Malinarič and Dieška (2009). A mathematical description was presented in detail by Wakeham et al (1991) and Liang (1995).…”

Section: Methodsmentioning

confidence: 99%

Thermal properties of wood and wood composites made from wood waste

Božíková¹,

Kotoulek²,

Bilčík³

et al. 2021

Int. Agrophys.

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Section: Methodsmentioning

confidence: 99%

Thermal properties of wood and wood composites made from wood waste

Božíková¹,

Kotoulek²,

Bilčík³

et al. 2021

Int. Agrophys.

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“…In situations of the best fit, both parameters λ and a can be determined. The method of fitting based on least-squares procedure was described in detail (Malinarič, 2004). Rheological data are important in product quality evaluation, engineering calculations and process design.…”

Section: Methodsmentioning

confidence: 99%

Selected physical properties of various diesel blends

Hlaváčová¹,

Božíková²,

Hlaváč³

et al. 2018

International Agrophysics

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A b s t r a c t. The quality determination of biofuels requires identifying the chemical and physical parameters. The key physical parameters are rheological, thermal and electrical properties. In our study, we investigated samples of diesel blends with rapeseed methyl esters content in the range from 3 to 100%. In these, we measured basic thermophysical properties, including thermal conductivity and thermal diffusivity, using two different transient methods -the hot-wire method and the dynamic plane source. Every thermophysical parameter was measured 100 times using both methods for all samples. Dynamic viscosity was measured during the heating process under the temperature range 20-80°C. A digital rotational viscometer (Brookfield DV 2T) was used for dynamic viscosity detection. Electrical conductivity was measured using digital conductivity meter (Model 1152) in a temperature range from -5 to 30°C. The highest values of thermal parameters were reached in the diesel sample with the highest biofuel content. The dynamic viscosity of samples increased with higher concentration of bio-component rapeseed methyl esters. The electrical conductivity of blends also increased with rapeseed methyl esters content.K e y w o r d s: diesel blends, rapeseed methyl ester, thermophysical, rheological and electrical properties INTRODUCTION

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“…The method can be used for thermophysical parameter measurements of polymeric materials, but heat losses from lateral sides of the sample are still problematic. Although the influence of heat losses was estimated in [6] to be much below 1 %, the measurements on polymethylmethacrylate (PMMA) in vacuum showed that it is about 4 % [8]. It could be expected taking into account that the thermal conductivity of air is about 0.025 W·m −1 ·K −1 compared to that of PMMA which is 0.2 W·m −1 ·K −1 [9].…”

mentioning

confidence: 99%

Modified Dynamic Plane Source Method for Measuring Thermophysical Parameters of Solids

2012

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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

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Improvements in the Dynamic Plane Source Method

Cited by 11 publications

References 8 publications

Thermal properties of wood and wood composites made from wood waste

Thermal properties of wood and wood composites made from wood waste

Selected physical properties of various diesel blends

Modified Dynamic Plane Source Method for Measuring Thermophysical Parameters of Solids

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