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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Semi-automatic non-commercial instrument for determining the thermal conductivity
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/TH03020313" target="_blank" >TH03020313: Enhancement of cooling and heating efficiency of heat transfer fluids using nanoaditives</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Internal product ID
INV22-052
Numerical identification
INV22-052
Technical parameters
rozsah teplot měřené kapaliny: 20 - 60°C, max. tlak v zařízení: 2 bar
Economical parameters
Zařízení umožňuje měřit tepelnou vodivost kapalin bez některých parazitních jevů, které se vyskytují u standardních metod (usazování, termoforéza).
Application category by cost
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Owner IČO
61388998
Owner name
Ústav termomechaniky AV ČR v. v. i.
Owner country
CZ - CZECH REPUBLIC
Usage type
V - Výsledek je využíván vlastníkem
Licence fee requirement
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Web page
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