Enhanced heat transfer of heat sink channels with micro pin fin roughened walls

Yeom, Taiho; Simon, Terrence W.; Zhang, Tao; Zhang, Min; North, Mark T.; Cui, Tianhong

doi:10.1016/j.ijheatmasstransfer.2015.09.014

Cited by 87 publications

(20 citation statements)

References 27 publications

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“…The proposed surface patterns not only enhance the heat transfer performance, but also cause higher pressure penalty in the system. In order to assess the effects of proposed surface patterns on the overall efficiency (ηT) of the flat-plate channels the following parameter is considered [19,[26][27][28][29][30].…”

Section: Rementioning

confidence: 99%

An investigation on thermo-hydraulic performance of a flat-plate channel with pyramidal protrusions

Ebrahimi

Naranjani

2016

Applied Thermal Engineering

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h i g h l i g h t sPyramidal protrusions are proposed for heat transfer enhancement applications. CFD is used to study the hydrothermal performance of the proposed surface pattern. The overall performance of a flat-plate channel is enhanced. The obtained results are investigated using entropy generation analysis. a b s t r a c tIn this study, a flat-plate channel configured with pyramidal protrusions are numerically analysed for the first time. Simulations of laminar single-phase fluid flow and heat transfer characteristics are developed using a finite-volume approach under steady-state condition. Pure water is selected as the coolant and its thermo-physical properties are modelled using a set of temperature-dependent functions. Different configurations of the channel, including a plain channel and a channel with nature-inspired protruded surfaces, are studied here for Reynolds numbers ranging from 135 to 1430. The effects of the protrusion shape, size and arrangement on the hydrothermal performance of a flat-plate channel are studied in details. The temperature of the upper and lower surfaces of the channel is kept constant during the simulations. It is observed that utilizing these configurations can boost the heat transfer up to 277.9% and amplify the pressure loss up to 179.4% with a respect to the plain channel. It is found that the overall efficiency of the channels with pyramidal protrusions is improved by 12.0-169.4% compared to the plain channel for the conditions studied here. Furthermore, the thermodynamic performance of the channel is investigated in terms of entropy generation and it is found that equipping the channels with pyramidal protrusions leads to lower irreversibility in the system.

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Section: Rementioning

confidence: 99%

An investigation on thermo-hydraulic performance of a flat-plate channel with pyramidal protrusions

Ebrahimi

Naranjani

2016

Applied Thermal Engineering

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“…Based on the previous research, mini-channel has been presenting to have a higher heat transfer ability compared to other water heat exchangers as reported in [11]. Similarly, the mini pin fin heat exchanger had been tested to be able to transfer more heat as explained in [12].…”

Section: Introductionmentioning

confidence: 99%

Performance of a Thermoelectric Powered by Solar Panel for a Large Cooler Box

Mirmanto¹,

Syahrul²,

Wirawan³

et al. 2020

Adv. sci. technol. eng. syst. j.

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An experiment to determine the performance of a thermoelectric powered by solar panel for a large cooler box was carried out. The size of the cooler box tested was 1000 mm x 500 mm x 400 mm and inside the cooler box, a plastic bottle containing 19 liters of water was placed. The thermoelectric hot side was cooled using a mini channel flowed with water. Meanwhile, the cold side of the thermoelectric was connected to the inner heat sink to absorb heat inside the cooler box. The thermoelectric was powered from a battery charged by solar panels directly. There were 2 solar panels, each of which had a power of 100 WP. The cooler box was tested for 6 days in June 2019. The results showed that the lowest temperature on the thermoelectric cold side was around 16.21°C, while the lowest temperature inside the cooler box was 24.25°C. The experimental COPs obtained were ranging from 0.01 to 0.76. Moreover, in general, solar panels were potential as power sources for thermoelectric cooling systems.

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“…The results of this study revealed that role of the fluid dynamic effects generated around micro pin fins is more important than the area increase due to micro pin fins in improvement of heat transfer. The maximum amount of heat transfer improvement for plain surface was equal to 79% that due to the micro pin-fin surface with 250 µm height and 400 µm diameter [22,23].…”

Section: Introductionmentioning

confidence: 92%

Numerical analysis of the surface and geometry of plate fin heat exchangers for increasing heat transfer rate

Shahdad

Fazelpour

2018

Int J Energy Environ Eng

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This paper investigates the flow field and turbulent flow heat transfer around an array of plain and perforated fin using Fluent software within the range of 20,000-50,000 Reynolds. Regarding the turbulent flow, the k-ε RNG turbulence model was implemented, and SIMPLE algorithm was used for solving the equations of three-dimensional, steady, and incompressible flow. In the simulation process, air was considered as the working fluid with consistent physical properties. The results revealed that perforated fins increase the heat transfer coefficient as well as Nusselt number. The highest heat transfer coefficient and Nusselt number was achieved for perforated fins with two square holes. Moreover, it was concluded that increase of Reynolds number notably increases the heat transfer coefficient and Nusselt number. The total drag force imposed to plain fins was higher than the force imposed to perforated fins. As a result, by changing plain fins into perforated fins, the pressure decreases due to passage of the flow through the pins, and accordingly, the total drag force imposed to the fins decreases. Finally, it was revealed that attaching some pins on the plain fins along the passing flow will decrease the pressure, while notably increase the heat transfer. Furthermore, it can reduce the fins' weight and price.

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Enhanced heat transfer of heat sink channels with micro pin fin roughened walls

Cited by 87 publications

References 27 publications

An investigation on thermo-hydraulic performance of a flat-plate channel with pyramidal protrusions

An investigation on thermo-hydraulic performance of a flat-plate channel with pyramidal protrusions

Performance of a Thermoelectric Powered by Solar Panel for a Large Cooler Box

Numerical analysis of the surface and geometry of plate fin heat exchangers for increasing heat transfer rate

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