Computational compensation of systematic errors accompanying non-equilibrium thermocouple measurements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00350033" target="_blank" >RIV/68407700:21110/21:00350033 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.ijthermalsci.2021.107049" target="_blank" >https://doi.org/10.1016/j.ijthermalsci.2021.107049</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijthermalsci.2021.107049" target="_blank" >10.1016/j.ijthermalsci.2021.107049</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Computational compensation of systematic errors accompanying non-equilibrium thermocouple measurements

Popis výsledku v původním jazyce

Application of thermocouple sets of various complexity as temperature sensors in porous materials can be accompanied with systematic errors related to the very high differences between the thermal conductivities of thermocouple forming metals and measured samples. Since the higher measurement uncertainties can then make some presumed utilizations of measured temperature fields questionable, this paper introduces an approach which can overcome this drawback. Using a computational model, it is able to separate parameters of particular constituents of the sample-thermocouple system that helps to filter out the systematic errors by means of extracting the pure material parameters. The applicability of the approach is demonstrated on a one-sided high-temperature heating experiment, in which the temperature field in a sample is monitored and subsequently used for the determination of thermal conductivity. The effect of the computational compensation procedure is found to be very significant. The up to 64 °C temperature differences between the raw data and corrected values can cause systematic thermal conductivity errors of up to 46%. Depending on temperature, the corrected thermal conductivity is then by up to 0.89 W.m-1.K-1 lower.

Název v anglickém jazyce

Computational compensation of systematic errors accompanying non-equilibrium thermocouple measurements

Popis výsledku anglicky

Application of thermocouple sets of various complexity as temperature sensors in porous materials can be accompanied with systematic errors related to the very high differences between the thermal conductivities of thermocouple forming metals and measured samples. Since the higher measurement uncertainties can then make some presumed utilizations of measured temperature fields questionable, this paper introduces an approach which can overcome this drawback. Using a computational model, it is able to separate parameters of particular constituents of the sample-thermocouple system that helps to filter out the systematic errors by means of extracting the pure material parameters. The applicability of the approach is demonstrated on a one-sided high-temperature heating experiment, in which the temperature field in a sample is monitored and subsequently used for the determination of thermal conductivity. The effect of the computational compensation procedure is found to be very significant. The up to 64 °C temperature differences between the raw data and corrected values can cause systematic thermal conductivity errors of up to 46%. Depending on temperature, the corrected thermal conductivity is then by up to 0.89 W.m-1.K-1 lower.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA20-00653S" target="_blank" >GA20-00653S: Fyzikální a chemické procesy v nízkocementových tepelně odolných kompozitech</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

International Journal of Thermal Sciences

ISSN

1290-0729

e-ISSN

1778-4166

Svazek periodika

168

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000661867000007

EID výsledku v databázi Scopus

2-s2.0-85107298728