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Energies 2019, 12(4), 584;

Airside Performance of H-Type Finned Tube Banks with Surface Modifications

Department of Aerospace Engineering, Indian Institute of Technology, Kharagpur 721302, India
Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Zhutung 310, Taiwan
Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
Author to whom correspondence should be addressed.
Received: 3 January 2019 / Revised: 1 February 2019 / Accepted: 3 February 2019 / Published: 13 February 2019
(This article belongs to the Special Issue Heat Transfer Enhancement)
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The present study numerically investigates some novel modifications to augment the performance of the H-type finned tube banks, which are widely used in waste heat recovery in industries. The imposed modifications upon the original H-type finned tube banks include the following: (1) Design 1 contains some triangular cuts at the edge of the original rectangular fin; (2) Design 2 modifies the original rectangular geometry into a trapezoid shape; (3) Design 3 renders the original rectangular cross-section fin thickness into trapezoid cross-section; and (4) Design 4 changes the original rectangular shape into a circular shape. Based on the simulations, it is found that Design 1 shows barely any improvements in the heat transfer performance and surface area reduction. Design 2 can provide some weight saving and surface area reduction at a slightly inferior heat transfer performance. Design 3 can offer up to 14% improvements in the overall heat transfer performance without any pumping power penalty. Yet, Design 4 provides the maximum weight saving as compared to the original reference case. With 3–9% lesser surface area than the reference case, Design 4 still offers marginally higher heat transfer performance. View Full-Text
Keywords: H-type fin; airside performance; heat transfer augmentation H-type fin; airside performance; heat transfer augmentation

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Bhale, P.; Kaushik, M.; Liaw, J.-S.; Wang, C.-C. Airside Performance of H-Type Finned Tube Banks with Surface Modifications. Energies 2019, 12, 584.

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