LrgpV1, Hal, Checkpoint, bibRecord, 000731

Intensification of heat transfer during evaporation of a falling liquid film in vertical microchannels-Experimental investigations

Identifieur interne : 000731 ( Hal/Checkpoint ); précédent : 000730; suivant : 000732

Intensification of heat transfer during evaporation of a falling liquid film in vertical microchannels-Experimental investigations

Auteurs : Hubert Monnier [France] ; Jean-François Portha [France] ; Abdoulaye Kane [France] ; Laurent Falk [France]

Source :

Chemical Engineering Science [ 0009-2509 ] ; 2012-06-18.

RBID : Hal:hal-00777223

English descriptors

mix :
- Confined-bubble, Evaporation, Falling film, Heat transfer, Microdistillation, ntensification.

Abstract

he aim of this article is to show the different boiling heat transfer regimes identified by Nukiyama (1934) in a micro-exchanger during a falling film evaporation. This study allows establishing operating conditions to develop the micro-evaporation or the micro-distillation where heat transfer has to be intensified. Indeed, the behaviour of binary mixtures on heat transfer is sometimes different than with a pure compound. The present study investigates the evaporation of ethanol in a sandwich plate micro-heat exchanger. Ethanol is a chemical test. It streams by gravity in falling film on two symmetrical heated micro-structured plates where micro-straight vertical channels have been machined (Kane et al., 2011). Electrical heat fluxes ranged from 2 to 5 kW/m(2). Various differences of temperatures between wall and saturation temperature were tested. Feed flow rate ranged between 1 and 5 g/min (smooth laminar flow: 2

Url:

https://hal.archives-ouvertes.fr/hal-00777223

DOI: 10.1016/j.ces.2012.03.008

Links toward previous steps (curation, corpus...)

to stream Hal, to step Corpus: 000637
to stream Hal, to step Curation: 000637

Links to Exploration step

Hal:hal-00777223

Le document en format XML

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<term>Evaporation</term>
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<front><div type="abstract" xml:lang="en">he aim of this article is to show the different boiling heat transfer regimes identified by Nukiyama (1934) in a micro-exchanger during a falling film evaporation. This study allows establishing operating conditions to develop the micro-evaporation or the micro-distillation where heat transfer has to be intensified. Indeed, the behaviour of binary mixtures on heat transfer is sometimes different than with a pure compound. The present study investigates the evaporation of ethanol in a sandwich plate micro-heat exchanger. Ethanol is a chemical test. It streams by gravity in falling film on two symmetrical heated micro-structured plates where micro-straight vertical channels have been machined (Kane et al., 2011). Electrical heat fluxes ranged from 2 to 5 kW/m(2). Various differences of temperatures between wall and saturation temperature were tested. Feed flow rate ranged between 1 and 5 g/min (smooth laminar flow: 2</div>
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<hal api="V3"><titleStmt><title xml:lang="en">Intensification of heat transfer during evaporation of a falling liquid film in vertical microchannels-Experimental investigations</title>
<author role="crp"><persName><forename type="first">Hubert</forename>
<surname>Monnier</surname>
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<email>hubert.monnier@inrs.fr</email>
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<author role="aut"><persName><forename type="first">Jean-François</forename>
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<editor role="depositor"><persName><forename>Gabriel</forename>
<surname>Wild</surname>
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<email>gabriel.wild@univ-lorraine.fr</email>
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<funder>CNRS Région Lorraine CPER (MEPP 13)</funder>
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<abstract xml:lang="en">he aim of this article is to show the different boiling heat transfer regimes identified by Nukiyama (1934) in a micro-exchanger during a falling film evaporation. This study allows establishing operating conditions to develop the micro-evaporation or the micro-distillation where heat transfer has to be intensified. Indeed, the behaviour of binary mixtures on heat transfer is sometimes different than with a pure compound. The present study investigates the evaporation of ethanol in a sandwich plate micro-heat exchanger. Ethanol is a chemical test. It streams by gravity in falling film on two symmetrical heated micro-structured plates where micro-straight vertical channels have been machined (Kane et al., 2011). Electrical heat fluxes ranged from 2 to 5 kW/m(2). Various differences of temperatures between wall and saturation temperature were tested. Feed flow rate ranged between 1 and 5 g/min (smooth laminar flow: 2</abstract>
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Intensification of heat transfer during evaporation of a falling liquid film in vertical microchannels-Experimental investigations

Intensification of heat transfer during evaporation of a falling liquid film in vertical microchannels-Experimental investigations

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