The Influence of Extreme Temperatures on Thermal Conductivity of the Grouting Mixture Designated for Borehole Heat Exchanger

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F21%3A10248238" target="_blank" >RIV/61989100:27350/21:10248238 - isvavai.cz</a>

Výsledek na webu

<a href="https://archive.iii.kyushu-u.ac.jp/public/NQNIAADIso-A-C0BjL99e5pPzasJN_ukz63FlZAQl-vb" target="_blank" >https://archive.iii.kyushu-u.ac.jp/public/NQNIAADIso-A-C0BjL99e5pPzasJN_ukz63FlZAQl-vb</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Influence of Extreme Temperatures on Thermal Conductivity of the Grouting Mixture Designated for Borehole Heat Exchanger

Popis výsledku v původním jazyce

At present, a huge emphasis is placed on the utilization of various alternative sources of energy worldwide. The ground-source heat pump draws heat from the rock environment with low consumption of electrical power, and therefore it achieves the criteria of social responsibility to the environment. Similar aspects are set for borehole thermal energy storage (BTES), in the principle of storing heat surpluses or waste heat to the rock environment and its subsequent draw. The research focuses on determining the thermophysical properties (thermal conductivity) of the grouting mixtures. Presented laboratory research focuses on assessing the effect of extreme temperature fluctuations (-20 oC the lowest, 80 oC the highest) on the quality of the tested grouting mixtures. Samples are exposed to very low and very high temperatures within the research, which lead to a decrease of the thermal conductivity in a laboratory set environment and cause visible degradation of the structure of researched mixture at the same time. Subsequent desiccation of the samples causes the occurrence of discontinuity, which is predisposing to worsen the applied properties of the grouting mixtures. The objective of this research is to describe what and how significant changes occur in collectors.

Název v anglickém jazyce

The Influence of Extreme Temperatures on Thermal Conductivity of the Grouting Mixture Designated for Borehole Heat Exchanger

Popis výsledku anglicky

At present, a huge emphasis is placed on the utilization of various alternative sources of energy worldwide. The ground-source heat pump draws heat from the rock environment with low consumption of electrical power, and therefore it achieves the criteria of social responsibility to the environment. Similar aspects are set for borehole thermal energy storage (BTES), in the principle of storing heat surpluses or waste heat to the rock environment and its subsequent draw. The research focuses on determining the thermophysical properties (thermal conductivity) of the grouting mixtures. Presented laboratory research focuses on assessing the effect of extreme temperature fluctuations (-20 oC the lowest, 80 oC the highest) on the quality of the tested grouting mixtures. Samples are exposed to very low and very high temperatures within the research, which lead to a decrease of the thermal conductivity in a laboratory set environment and cause visible degradation of the structure of researched mixture at the same time. Subsequent desiccation of the samples causes the occurrence of discontinuity, which is predisposing to worsen the applied properties of the grouting mixtures. The objective of this research is to describe what and how significant changes occur in collectors.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

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Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Symposium on Earth Science and Technology 2021 : proceedings : November 25-26, 2021, Shiiki Hall, Kyushu University, Fukuoka, Japan

ISBN

978-4-9902357-0-3

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

377-382

Název nakladatele

CINEST

Místo vydání

Fukuoka

Místo konání akce

Fukuoka

Datum konání akce

25. 11. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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