Semi-automatic non-commercial instrument for determining the thermal conductivity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F22%3A00557207" target="_blank" >RIV/61388998:_____/22:00557207 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Semi-automatic non-commercial instrument for determining the thermal conductivity

Popis výsledku v původním jazyce

The subject of the functional sample is a device serving for measurement of thermal conductivity of liquids. A tested liquid flows through the device, whose measuring part is formed by a bundle of parallel circular channels. The liquid flows through the channels at flow rate, that is chosen so that a laminar regime is achieved in each channel. A known amount of heat flux is being added to the liquid along a certain sector of the channel bundle. Since the heat transfer parameters for laminar circular flow are exactly known, the thermal conductivity of the tested liquid can be evaluated from the measured flow rate, added heat flux, and temperature differences.nThis method is specifically suitable for liquids containing some particles. As the measured liquid is in continuous motion during the measurement, the sedimentation of particles and other phenomena such as thermophoresis (particle motion due to temperature gradients), which are problematic with the static methods, are avoided.nAll process parameters are recorded and controlled by a computer with inhouse developed software. Consequently, the measuring procedure can be automated, with exception of cleaning, filling and similar operations.

Název v anglickém jazyce

Semi-automatic non-commercial instrument for determining the thermal conductivity

Popis výsledku anglicky

The subject of the functional sample is a device serving for measurement of thermal conductivity of liquids. A tested liquid flows through the device, whose measuring part is formed by a bundle of parallel circular channels. The liquid flows through the channels at flow rate, that is chosen so that a laminar regime is achieved in each channel. A known amount of heat flux is being added to the liquid along a certain sector of the channel bundle. Since the heat transfer parameters for laminar circular flow are exactly known, the thermal conductivity of the tested liquid can be evaluated from the measured flow rate, added heat flux, and temperature differences.nThis method is specifically suitable for liquids containing some particles. As the measured liquid is in continuous motion during the measurement, the sedimentation of particles and other phenomena such as thermophoresis (particle motion due to temperature gradients), which are problematic with the static methods, are avoided.nAll process parameters are recorded and controlled by a computer with inhouse developed software. Consequently, the measuring procedure can be automated, with exception of cleaning, filling and similar operations.

Druh

G_funk - Funkční vzorek

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/TH03020313" target="_blank" >TH03020313: Využití nanoaditiv pro zvýšení účinnosti přenosu tepla a chladu u teplosměnných kapalin</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Interní identifikační kód produktu

INV22-052

Číselná identifikace

INV22-052

Technické parametry

rozsah teplot měřené kapaliny: 20 - 60°C, max. tlak v zařízení: 2 bar

Ekonomické parametry

Zařízení umožňuje měřit tepelnou vodivost kapalin bez některých parazitních jevů, které se vyskytují u standardních metod (usazování, termoforéza).

Kategorie aplik. výsledku dle nákladů

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IČO vlastníka výsledku

61388998

Název vlastníka

Ústav termomechaniky AV ČR v. v. i.

Stát vlastníka

CZ - Česká republika

Druh možnosti využití

V - Výsledek je využíván vlastníkem

Požadavek na licenční poplatek

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Adresa www stránky s výsledkem

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