Airside heat transfer and pressure drop of louver-finned parallel flow heat exchanger having a drainage channel
Open accessAbstract
Conventional louver fins have an inherent problem of condensate drainage. In this study, a newly developed louver fin is introduced. The louver fin has downstream a drainage channel. The dry and the wet surface heat transfer and pressure drop characteristics of the new sample were investigated, and the results were compared with those of the conventional sample. Compared to the conventional sample, superior wet surface heat transfer and pressure drop characteristics were obtained. The j factors of the new sample were 40% larger, and the f factors were 9% smaller. In addition, the wet j and f factors were not much different from the dry ones, which imply that excellent condensate drainage is possible for the new fin. Under dry condition, however, poor heat transfer and pressure drop characteristics were obtained. The j factors of the conventional sample were 81% larger, and the f factors were 14% smaller. Allocation of the fin surface to flat (not enhanced) drainage channel for the new fin may be responsible. Under wet condition, j/f1/3 of the new sample was 45% larger than that of the conventional sample. Under dry condition, however, j/f1/3 of the conventional sample was 91% larger.
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By using novel louvered fins, j factors are increased up to 40% and f factors are decreased up to 9%.
“By using novel louvered fins, the j fac tors were increased up to 40% and f factors were decreased up to 9%.”
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 [96]
The Results and Discussions and Conclusions report that, under wet conditions, the new fin had a 40% higher j factor and a 9% lower f factor than the conventional fin. The claim omits that condition: under dry conditions, the paper reports the opposite trend. (LLM, conf=0.88)
Experimental — accuracy not yet measuredFor the new louvered fins, there is no significant difference in j and f factors on the wet surface compared with the dry surface, which proves excellent drainage performance.
“In addition, for the new louvered fins, there is no significant difference in j and f factors on the wet surface in comparison with the dry surface, which proved that the new louvered fins had excellent drainage performance.”
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 [96]
The Results and Discussions section says the new fin’s wet j and f factors were not much different from its dry factors and interprets this as implying that excellent condensate drainage is possible. The Conclusions repeat that interpretation. The citing sentence overstates the inference by saying the comparison proved excellent drainage performance. (LLM, conf=0.86)
Experimental — accuracy not yet measuredThe new louvered-fin MCHX has better wet surface thermal-hydraulic performance than the conventional MCHX.
“According to the results, the new louvered-fin MCHX had better wet surface thermal-hydraulic performance than the conventional MCHX.”
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Cites
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Water condensate retention and “wet” fin performance in automotive evaporators
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Flagged first, then by citations
Research works printed but not linked: 23
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Cited by
Sorted by citations
Li, F., Wu, S., Ma, Z., Zhao, R., & Huang, D. (2022) · Applied Thermal Engineering · doi:10.1016/j.applthermaleng.2022.118220 · Cited by 36 · see citing works
Xiong, T., Liu, G., Gao, Q., Yan, G., & Yu, J. (2023) · Journal of Building Engineering · doi:10.1016/j.jobe.2022.105654 · Cited by 26 · see citing works
- Authors
- KIM, N.-H., & CHO, H.
- Affiliations
- Incheon National University (KR)
- Samsung Electronics (South Korea) (KR)
- Venue
- Journal of Thermal Science and Technology
- Published
- 2018
- Volume
- 13
- Issue
- 1
- Pages
- JTST0018-JTST0018
- ISSN
- 1880-5566 (ISSN-L)
- OpenAlex
- W2808602537
- Cited by
- 15
- References
- 7
- Citations by year
- 2026: 4 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 3 · 2020: 1
- FWCI
- 0.64
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Journal of Thermal Science and Technology (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- Incheon National University
- 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
- louver fins, parallel flow heat exchanger, condensate drainage, drainage channels, air-side heat transfer, pressure drop
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