Thermal-hydraulic experimental study of louvered fin-and-flat-tube heat exchanger under wet conditions with variation of inlet humidity ratio

Ayad, F.; Benelmir, R.; Idris, M.

doi:10.1016/j.applthermaleng.2020.116218

Cited by 30Heat Transfer and OptimizationHeat Transfer MechanismsHeat Transfer and Boiling Studies

Thermal-hydraulic experimental study of louvered fin-and-flat-tube heat exchanger under wet conditions with variation of inlet humidity ratio

Ayad, F., Benelmir, R., Idris, M.·2021·Applied Thermal Engineering

DOI 10.1016/j.applthermaleng.2020.116218

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At high Re, the wet j factor is 3-23% lower than the dry j factor in the inlet humidity ratio of 9.2-27.7 gw/kgd.
“At high Re , the wet j factor was 3 -23% lower than that of dry j factor in the inlet humidity ratio of 9 . 2 27 . 7 gw / kgd .”
From Thermal-hydraulic and drainage performance of microchannel heat exchangers for refrigeration and heat pump systems under frosting, defrosting, and wet conditions: A comprehensive review (2023) · cites this paper as [93]
The friction factor is 15-43% greater than that of dry surfaces in RH = 20-60% under dehumidifying conditions.
“The friction factor was 15 -43% greater than that of dry surfaces in RH = 20 60% under dehumidifying conditions.”
From Thermal-hydraulic and drainage performance of microchannel heat exchangers for refrigeration and heat pump systems under frosting, defrosting, and wet conditions: A comprehensive review (2023) · cites this paper as [93]
As Re increases, the wet j factor is less than the dry j factor, and the wet surface multiplier of the j factor is less than 1.
“Nevertheless, as the Re increased, the wet j factor was less than the dry j factor, and the wet surface multiplier of the j factor was less than 1, as shown in Fig. 17.”
From Thermal-hydraulic and drainage performance of microchannel heat exchangers for refrigeration and heat pump systems under frosting, defrosting, and wet conditions: A comprehensive review (2023) · cites this paper as [93]
At low Re, the Colburn factor is unaffected by wet surfaces and is independent of inlet RH.
“At low Re , the Colburn factor was unaffected by wet surfaces and it was independent of inlet RH.”
From Thermal-hydraulic and drainage performance of microchannel heat exchangers for refrigeration and heat pump systems under frosting, defrosting, and wet conditions: A comprehensive review (2023) · cites this paper as [93]
Higher air velocity promotes the removal of condensate.
“Ayad et al. also obtained similar conclusions, that is, the higher air velocity promoted the removal of condensate.”
From Thermal-hydraulic and drainage performance of microchannel heat exchangers for refrigeration and heat pump systems under frosting, defrosting, and wet conditions: A comprehensive review (2023) · cites this paper as [93]

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Authors: Ayad, F., Benelmir, R., & Idris, M.
Affiliations: Laboratoire d'Etudes et de Recherche sur le Matériau Bois (FR)
Corresponding author: Ayad, F.
ORCID: Ayad, F.
Venue: Applied Thermal Engineering
Publisher: Elsevier BV
Published: 2021-01
Volume: 183
Pages: 116218
ISSN: 1359-4311 (ISSN-L)
DOI: 10.1016/j.applthermaleng.2020.116218
OpenAlex: W3094537024
Cited by: 30
References: 32
Citations by year: 2026: 6 · 2025: 4 · 2024: 9 · 2023: 4 · 2022: 4 · 2021: 3
FWCI: 1.35
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
www.elsevier.com/legal/tdmrep-license (tdm)
Locations: Applied Thermal Engineering (publishedVersion)
HAL (submittedVersion)
Topics: Physical Sciences › Engineering › Mechanical Engineering › Heat Transfer and Optimization
Physical Sciences › Engineering › Mechanical Engineering › Heat Transfer Mechanisms
Physical Sciences › Engineering › Mechanical Engineering › Heat Transfer and Boiling Studies
Keywords: wet conditions, heat transfer deterioration, louver angle

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Thermal-hydraulic experimental study of louvered fin-and-flat-tube heat exchanger under wet conditions with variation of inlet humidity ratio

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