Thermal imaging-A novel method for gas-liquid Interface conditions determination

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F21%3A43923537" target="_blank" >RIV/60461373:22340/21:43923537 - isvavai.cz</a>
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0735193321006758?token=9A00611986FA53AC0C4217EC6EF1226E44C628C79EF48691481AD6DCB420A24CF8FFE34EFAF6393C445E393B4733C7A8&originRegion=eu-west-1&originCreation=20220227224817" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0735193321006758?token=9A00611986FA53AC0C4217EC6EF1226E44C628C79EF48691481AD6DCB420A24CF8FFE34EFAF6393C445E393B4733C7A8&originRegion=eu-west-1&originCreation=20220227224817</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.icheatmasstransfer.2021.105782" target="_blank" >10.1016/j.icheatmasstransfer.2021.105782</a>

Result language
angličtina
Original language name
Thermal imaging-A novel method for gas-liquid Interface conditions determination
Original language description
We suggest monitoring of the interfacial mass transfer activity over the surface of the packing under distillation conditions by a thermal camera. Such a study should reveal zones with imperfect hydrodynamics and decreased mass-transfer intensity, enabling quantification of the fraction of the packing geometrical area, which is ineffective in the interfacial mass exchange. The objective of the present study is to validate that the temperature of a liquid surface measured by the camera is truly the temperature of the interface, which can substantially differ from the liquid bulk temperature under the non-zero heat and mass-transfer conditions. Validation experiments are performed using a water-air system with zero net mass transfer across the interface and non-zero heat transfer induced by cooling of the liquid phase and heating of the gas phase. The interface temperature is indirectly determined from the partial pressure of water in the air above the liquid level. The results show that the temperature reading of the thermal camera is up to 92% determined by the temperature of the interface. Its measurement opens the possibility of determining not only effective interfacial area but also local distribution of the mass-transfer and heat-transfer resistances between the phases.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20401 - Chemical engineering (plants, products)

Project
<a href="/en/project/GA20-20335S" target="_blank" >GA20-20335S: Gas-liquid interface study using thermography</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

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

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