How Does Uncertainty Of Thermal Conductivity Impact Measurements Of Pool Boiling Heat Transfer Coefficient?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00355241" target="_blank" >RIV/68407700:21220/21:00355241 - isvavai.cz</a>
Result on the web
<a href="https://www.icct.cz/cs/Amca-ICCT/media/content/2021/proceedings/ICCT2021-Proceedings.pdf" target="_blank" >https://www.icct.cz/cs/Amca-ICCT/media/content/2021/proceedings/ICCT2021-Proceedings.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
How Does Uncertainty Of Thermal Conductivity Impact Measurements Of Pool Boiling Heat Transfer Coefficient?
Original language description
This work analyzes how value of thermal conductivity of a tested sample impact pool boiling heat transfer coefficients (HTCs) measured with a common experimental apparatus. A typical measurement of pool boiling HTC is based on 1D conduction in a heated block. Temperature of the boiling surface and heat flux are both calculated from temperature distribution inside the block. Value of thermal conductivity of the block is needed for calculation of heat flux and resulting HTC. Researchers seldom measure thermal conductivity of their samples. A certain value, which corresponds to the material of the investigated sample, is typically adopted from the literature and considered to be independent of temperature. This approach is sometimes criticized as it might lead to significant measurement errors. This contribution quantifies the impact of thermal conductivity and its uncertainty on resulting HTC. For our pool boiling apparatus, it was found out that uncertainty of heat transfer coefficient remains acceptable even when uncertainty of thermal conductivity is purposely overvalued. Furthermore, it was found out that neglecting temperature dependency of thermal conductivity does not lead to substantial errors of resulting HTC.
Czech name
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Czech description
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Project
<a href="/en/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Research centre for low-carbon energy technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the 8th International Conference on Chemical Technology
ISBN
978-80-88307-08-2
ISSN
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e-ISSN
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Number of pages
5
Pages from-to
316-320
Publisher name
Czech Society of Industrial Chemistry
Place of publication
Prague
Event location
Mikulov
Event date
May 3, 2021
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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