Thermal evaluation of flow channels with perforated-baffles

Smith Eiamsa-ard; Arnut Phila; Khwanchit Wongcharee; Monsak Pimsarn; Naoki Maruyama; Masafumi Hirota

Energy Reports (May 2023)

Thermal evaluation of flow channels with perforated-baffles

Smith Eiamsa-ard,
Arnut Phila,
Khwanchit Wongcharee,
Monsak Pimsarn,
Naoki Maruyama,
Masafumi Hirota

Affiliations

Smith Eiamsa-ard: Division of System Engineering, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan; Department of Mechanical Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand; Corresponding author at: Department of Mechanical Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand.
Arnut Phila: Department of Mechanical Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand
Khwanchit Wongcharee: Department of Mechanical Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand
Monsak Pimsarn: School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand
Naoki Maruyama: Division of Mechanical Engineering, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan; Engineering Innovation Unit, Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, 514-8507, Japan
Masafumi Hirota: Division of Mechanical Engineering, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan

Journal volume & issue: Vol. 9
pp. 525 – 532

Abstract

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The influences of perforated-baffles on the local Nusselt number (Nu) and thermo-hydraulic behaviors were comprehensively studied using thermochromic liquid crystal sheet. The perforated-baffles were designed in two forms: perforated-baffle (PB) and perforated-baffle with square wings (SW-PBs). Transverse solid baffles (TBs) were also tested for an assessment. All baffles had an identical height of 12 mm (e/H = 0.3). Experimental results showed that SW-PBs offered better Nu than PBs. It is also seen that PBs and SW-PBs caused lower pressure loss than TBs by around 20.49% and 13.98%, respectively. The reduction of friction loss was primarily due to the baffle perforation. In addition, the PBs yielded the thermal performance factors (TPF) up to 1.01 at the lowest Reynolds number of 6000.

Published in Energy Reports

ISSN: 2352-4847 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: http://www.journals.elsevier.com/energy-reports/

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