Numerical and experimental investigations of the heat transfer and fatigue life of a new W-type mini microchannel heat exchanger

Yao, Ying Xue; Huanling, L; Guo, Xijing; Xie, Gongnan; Shao, Xiaodong

doi:10.1016/j.ijheatmasstransfer.2023.124293

Cited by 6 publications

(1 citation statement)

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“…Su [ 11 ] used numerical simulation to study the three-dimensional heat transfer problem at the entrance of a small rectangular channel at a constant wall temperature. Yao et al [ 12 ] studied the heat transfer and service life of the new W-type micro/small channel heat exchanger. Sharma and Khan [ 13 ] investigated the effect of variable curvature of wavy microchannels on heat transfer and flow characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on flow and heat transfer characteristics of rectangular mini-channel of interpolated double S turbulators

Xi,

Meng

2024

PLoS ONE

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In this study, we propose a new type of small-channel plug-in, the double S turbulators, for passive heat transfer enhancement to improve the flow and heat transfer performance of the fluid in the channel. In the range of Reynolds number 254.51~2545.09, under constant wall temperature heating conditions, the effects of interpolated double S turbulators with different long axial radii (1mm, 1.5mm, 2mm) on the average Nusselt number, pressure drop, total thermal resistance and field synergy number in the rectangular mini-channel were studied. The simulation results show that compared with the smooth rectangular mini-channel, after interpolating double S turbulators with different long axial radii (1mm, 1.5mm, 2mm), the average Nusselt number increased by 81.74%~101.74%, 71.29%~94.06%, 67.16%~88.48%, the total thermal resistance decreased by 45.1%~50.72%, 41.72%~48.74%, 40.28%~47.2%, and the number of field synergies increased by 85.58%~111.65%, 74.1%~102.6%, 69.64%~96.12%. At present, there are few studies on the boundary condition of constant wall temperature, and this paper supplements the research on this aspect. At the same time, the heat transfer performance of the rectangular mini-channel of the interpolated double S turbulators is stronger than that of the ordinary smooth rectangular mini-channel, which not only provides a new idea for the manufacture of micro heat dissipation equipment, but also improves the heat transfer performance of micro heat dissipation equipment and improves its work efficiency. According to the simulation data, the prediction formula of average Nusselt number and pressure drop was established by nonlinear regression method, which can be used to predict the flow and heat transfer characteristics of the rectangular mini-channel of the interpolated double S turbulators.

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Section: Introductionmentioning

confidence: 99%