Numerical Study on the Effect of Tube Rows on the Heat Transfer Characteristic of Dimpled Fin

Wu, Xuehong; Feng, Lihua; Liu, Dandan; Meng, Hao; Lü, Yuling

doi:10.1155/2014/637052

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…Figure 2. Plate-and-tube heat exchanger, studied by CFD methods in [6]: 1 -dimpled fin Its thermal and hydraulic characteristics were investigated by CFD methods in [6].…”

Section: Proposal Of Continuous Fins Dimpling Usage For Improvement Omentioning

confidence: 99%

“…But this work does not attempt to determine the optimal configuration of the mutual arrangement of the recesses, protrusions and edges, but noted their positive mutual influence on heat transfer in a channel. Some results of numerical study heat transfer and hydrodynamics of such heat exchanger obtained in [6] are shown in fig.5. For dimpled fins and a one row of tubes authors obtained Nu number depending on Re number for smooth and dimpled fins ( see fig.5).…”

Section: Proposal Of Continuous Fins Dimpling Usage For Improvement Omentioning

confidence: 99%

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Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

Gotovsky¹,

Kolpakov²,

Mikhailov³

et al. 2017

IJHT

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To date, accumulated large amount of experimental and theoretical data on the thermal hydraulics dimpled surfaces that demonstrate their high efficiency. However, the extent of the use of these surfaces in the industry far below their potential. This paper discusses the idea of using these surfaces to increase the efficiency of heat exchangers with a high coefficient of fins (e.g., air coolers). This makes it possible to achieve good results with minimal pressure loss increase and admit to widen practical use of such artificial roughness. Importantly, these reliefs provide heat transfer enhancement both on the side with dimples and on the side with protrusions. Most practically suitable for industrial implementation are tube-and-plate heat exchangers with continuous fins and new type of finned tubes − flat-oval tubes with partial finning. When using plane fins with dimples we can substantially increase efficiency if heat transfer intensity on shell side is not high. So we can bring the level of compactness of shell-and-tube heat exchangers up to values characteristic for the plate heat exchangers. Results of calculations showed a possibility of efficiency increase due to dimples to 60-70%.

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“…Figure 2. Plate-and-tube heat exchanger, studied by CFD methods in [6]: 1 -dimpled fin Its thermal and hydraulic characteristics were investigated by CFD methods in [6].…”

Section: Proposal Of Continuous Fins Dimpling Usage For Improvement Omentioning

confidence: 99%

Section: Proposal Of Continuous Fins Dimpling Usage For Improvement Omentioning

confidence: 99%

Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

Gotovsky¹,

Kolpakov²,

Mikhailov³

et al. 2017

IJHT

View full text Add to dashboard Cite

show abstract

“…Similarly, others also investigated the flow and heat transfer of dimple channels, effects of bleed holes and nanofluids flow in dimpled channels (Qu et al, 2013;Shen et al, 2013;Sinha and Srivastava, 2017). Furthermore, heat transfer characteristics of dimple protrusion (Chen et al, 2014;Li et al, 2014;Liu et al, 2015;Shen et al, 2017;Li et al, 2016;Zheng et al, 2016) and dimple fin (Chang et al, 2017;Wei et al, 2016;Wu et al, 2014;Luo et al, 2015;Park et al, 2016;Fan and Yin, 2008) were also widely studied. Based on above backgrounds, these works all showed the positive effects of dimples by observing the importance of geometrical parameters and flow properties.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer analysis on dimple geometries and arrangements in dimple jacketed heat exchanger

Qian

Zhang

et al. 2019

HFF

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Purpose The purpose of this paper is to study the effects of dimple geometries and arrangements on the heat transfer enhancement in a dimple jacketed heat exchanger. Design/methodology/approach For the purpose of this paper, with the experimental validated numerical model, this paper carries out numerical simulations of both single dimples with different geometries and the whole dimple jacketed heat exchanger with different dimple arrangements. For a single dimple, its secondary vortex flow, temperature differences and the pressure drop performance for different geometries are analyzed. For the whole dimple jacketed heat exchanger, the heat transfer and pressure drop performances are investigated by comparing the no dimple, triangular and rectangular dimple arrangements. Findings Results show that dimples can improve the heat transfer efficiency compared with conventional jacketed heat exchanger, and specific geometries and arrangement of dimples for better heat transfer performance are figured out. Originality/value This paper considers both dimple geometries and arrangements, which can be useful for further applications in specific integrated devices or similar applications.

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Computational investigation of cross flow heat exchanger: A study for performance enhancement using spherical dimples on fin surface

Paul,

Lubaba,

Pratik

et al. 2023

International Journal of Thermofluids

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Numerical Study on the Effect of Tube Rows on the Heat Transfer Characteristic of Dimpled Fin

Cited by 7 publications

References 34 publications

Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

Heat transfer analysis on dimple geometries and arrangements in dimple jacketed heat exchanger

Computational investigation of cross flow heat exchanger: A study for performance enhancement using spherical dimples on fin surface

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