Correction of errors in DSC measurements using detailed modeling of thermal phenomena in calorimeter-sample system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00341017" target="_blank" >RIV/68407700:21110/20:00341017 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/TIM.2020.2987454" target="_blank" >https://doi.org/10.1109/TIM.2020.2987454</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TIM.2020.2987454" target="_blank" >10.1109/TIM.2020.2987454</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Correction of errors in DSC measurements using detailed modeling of thermal phenomena in calorimeter-sample system

Popis výsledku v původním jazyce

Measurements of quantities by differential scanning calorimetry (DSC) are influenced by intrinsic factors given by the construction limits of particular DSC devices. The position of temperature sensors outside the samples causes the produced experimental outputs to suffer from signal delay or partial signal consumption. Differences in sample mass and heating rate belong to other typical sources of errors which cannot be fully eliminated even by the experimental calibration. In this paper, a computational method involving detailed modeling of thermal phenomena in the calorimeter-sample system is used for the correction of inaccuracies in DSC measurements. The applied model is able to extract pure data related to the sample itself that is free of distortion. In a practical application of the method, lime hydrate samples of various mass are analyzed at first experimentally while several different heating rates are used, and the influence of varying parameters on the obtained outputs is recorded. The experimental data are then reconstructed using computational modeling of thermal phenomena in the calorimeter-sample system. The corrected specific heat power values are found to be up to 9% higher and can be attributed to the heat capacity of inner parts of the device that consume a part of the heat. The highest agreement between experimental and computational outputs is achieved when a sample filling one half of the crucible’s volume is heated at 7 K.min-1. Such a parameter choice shows a low temperature shift (<5 °C) and the specific heat power difference is only 0.09 mW.mg-1 (3.4 %).

Název v anglickém jazyce

Correction of errors in DSC measurements using detailed modeling of thermal phenomena in calorimeter-sample system

Popis výsledku anglicky

Measurements of quantities by differential scanning calorimetry (DSC) are influenced by intrinsic factors given by the construction limits of particular DSC devices. The position of temperature sensors outside the samples causes the produced experimental outputs to suffer from signal delay or partial signal consumption. Differences in sample mass and heating rate belong to other typical sources of errors which cannot be fully eliminated even by the experimental calibration. In this paper, a computational method involving detailed modeling of thermal phenomena in the calorimeter-sample system is used for the correction of inaccuracies in DSC measurements. The applied model is able to extract pure data related to the sample itself that is free of distortion. In a practical application of the method, lime hydrate samples of various mass are analyzed at first experimentally while several different heating rates are used, and the influence of varying parameters on the obtained outputs is recorded. The experimental data are then reconstructed using computational modeling of thermal phenomena in the calorimeter-sample system. The corrected specific heat power values are found to be up to 9% higher and can be attributed to the heat capacity of inner parts of the device that consume a part of the heat. The highest agreement between experimental and computational outputs is achieved when a sample filling one half of the crucible’s volume is heated at 7 K.min-1. Such a parameter choice shows a low temperature shift (<5 °C) and the specific heat power difference is only 0.09 mW.mg-1 (3.4 %).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA18-03997S" target="_blank" >GA18-03997S: Vnitřní omítky se zvýšenou vlhkostní akumulační schopností</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

IEEE Transactions on Instrumentation and Measurement

ISSN

0018-9456

e-ISSN

1557-9662

Svazek periodika

69

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

8178-8186

Kód UT WoS článku

000571849100083

EID výsledku v databázi Scopus

2-s2.0-85091737675