Abstract
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.
Highlights
Finned-tube heat exchangers are widely used for heat exchange between air and liquids
Many experimental and numerical studies on H-type finned tube banks focused on the fin layout in the heat exchangers and the effect of varying geometric parameters like fin width, fin height, fin pitch, fin thickness, and air velocity on the overall heat transfer performance
Model three-different mesh systems are investigated for the original H-type finned tube bank without any cuts (Bank X) using 2,670,583 to validate the grid independency the The solutions, three-different meshfor systems are
Summary
Finned-tube heat exchangers are widely used for heat exchange between air and liquids. Many experimental and numerical studies on H-type finned tube banks focused on the fin layout in the heat exchangers and the effect of varying geometric parameters like fin width, fin height, fin pitch, fin thickness, and air velocity on the overall heat transfer performance. The H-type finned tube bank houses a huge volume and weight that is costly, and bulky as far as installation is concerned In this regard, it is the objective of this study to elaborate some possible ways to reduce the surface area (or weight) of the H-type finned bank while maintaining the associated heat transfer performance.
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