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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

<a href="/cs/project/GA20-20335S" target="_blank" >GA20-20335S: Studium fázového rozhraní kapalina-plyn pomocí termografie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER

ISSN

0735-1933

e-ISSN

—

Svazek periodika

130

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000728583400006

EID výsledku v databázi Scopus

2-s2.0-85120348303