Performance comparison of pin fin in-duct flow arrays with various pin cross-sections

Sahiti, Naser; Lemouedda, A.; Stojković, Dragan; Durst, F.; Franz, Enrico

doi:10.1016/j.applthermaleng.2005.10.042

Cited by 139 publications

(74 citation statements)

References 9 publications

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“…The effect of pin arrangement in terms of pin density and orientation to the dominant flow direction (either inline or staggered) has also been shown to be very influential in PHSs. Generally, increasing pin density and employing staggered arrangements of pins both lead to increased rates of heat transfer and larger pressure losses, [8,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of thermal airflows over strip fin heat sinks

Al-Sallami

Al‐damook

Thompson

2016

International Communications in Heat and Mass Transfer

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The benefits of using strip fin heat sinks (SFHSs) where the cross-sectional aspect ratio of the fins lie between those for plate fins (high aspect ratio) and pins fins (aspect ratio ) are explored computationally, using a conjugate heat transfer model. Results show that strip fins provide another effective means of enhancing heat transfer, especially when staggered arrangements of strip fins are used. A detailed parameter investigation demonstrates that perforating the strip fins provide additional improvements in terms of enhanced heat transfer, together with reduced pressure loss and heat sink mass. Results are also given which show that, for practical applications in micro-electronics cooling, perforated SFHSs offer important benefits as a means of achieving smaller processor temperatures for reduced mechanical power consumption.

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Section: Introductionmentioning

confidence: 99%

A numerical investigation of thermal airflows over strip fin heat sinks

Al-Sallami

Al‐damook

Thompson

2016

International Communications in Heat and Mass Transfer

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“…The optimal designs are selected based on the maximization of heat transfer per unit volume with a minimization of the power input. More details on this assessment method are given in [20,21].…”

Section: Performance Assessment Methodsmentioning

confidence: 99%

Numerical investigations for the optimization of serrated finned-tube heat exchangers

Lemouedda

Schmid

Franz

et al. 2011

Applied Thermal Engineering

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Helical serrated finned-tubes are well established in many thermal systems. This paper presents the results of numerical calculations carried out for the performance improvement of these devices. The work is divided into three main investigations conducted for Reynolds numbers between Re = 600 and 2600. The first investigation shows the effect of the fin serration, where a comparison between performances of finned tubes with and without fin serration is presented. Another main investigation is conducted on the effect of fin twisting of the outermost part of the fin on the performance of the serrated finned-tubes. Here, twisting angles considered are between β = 0• and 25• .The third investigation deals with the effect of the number of fin segments per period.

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“…This can, on the one hand, be achieved by a pin-fin structure with anisotropic thermal conductivity, although its manufacture is costly [5,6]. On the other hand, wire structures based on weaving or knitting technology can be oriented similarly, with the benefit of highly developed manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Wire Structure Heat Exchangers—New Designs for Efficient Heat Transfer

2017

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Enhancing the heat transfer mechanism by increasing the heat exchanger surface area is a standard way to overcome low heat transfer on the gas side of heat exchangers. Different geometrical shapes, for example, plain, wavy, or interrupted fin geometries for plate-fin or tube-fin heat exchangers, are used for this task. Wire structures with dimensions in the submillimeter range are already used in regenerators for their heat capacity, but are rarely used in recuperators as heat transfer enhancers. New textile developments enable the fabrication of adapted structures with irregular grid sizes, and purpose-built for heat exchanger application. These wire structures allow for enlarging the heat transfer surface area, decreasing material utilization, and enabling flexibility of different geometrical dimensions. Possibilities for manufacturing and design selection are studied in the project, EffiMet, and thereafter at Fraunhofer ISE for the implementation of highly efficient heat exchanger geometries based on wire structures.

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Performance comparison of pin fin in-duct flow arrays with various pin cross-sections

Cited by 139 publications

References 9 publications

A numerical investigation of thermal airflows over strip fin heat sinks

A numerical investigation of thermal airflows over strip fin heat sinks

Numerical investigations for the optimization of serrated finned-tube heat exchangers

Wire Structure Heat Exchangers—New Designs for Efficient Heat Transfer

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