Experimental investigation of enhanced performance of pin fin heat sink with wings

Choudhary, Vishwjeet; Kumar, Manoj; Patil, Anil Kumar

doi:10.1016/j.applthermaleng.2019.03.139

Cited by 67 publications

(12 citation statements)

References 21 publications

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“…Because of these advantages, it has a high application value in refrigeration, electronic device cooling, LED lamp cooling, and medical device temperature control. However, its cooling capacity is limited, the coefficient of performance (COP) is lower than that of compressors [1,2], and this obstacle has prompted researchers to pursue new ways to elevate efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…In general, there are two ways to improve thermoelectric cooling efficiency [3]. (1) Change the inherent properties of the materials inside the TEC module, such as changing the geometry and length of thermocouples [4,5], segmenting P-type and N-type thermocouples [6], or researching the constituent materials of thermocouples to improve the figure of merit [7]. However, when the TEC is in use, its inherent internal properties cannot be changed, which requires another method to improve its cooling performance [3].…”

Section: Introductionmentioning

confidence: 99%

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Study on Performance of the Thermoelectric Cooling Device with Novel Subchannel Finned Heat Sink

et al. 2021

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The thermoelectric refrigeration system is an application of the Peltier effect, and good refrigeration performance is dependent on effective heat dissipation performance. To enhance the cooling performance of the thermoelectric system, this paper designs a new type of finned heat sink, which does not change the overall size of the thermoelectric system. The performance of the refrigeration system under the new fin is tested by experiments under various conditions. During the experiment, the cooling wind speed, the temperature of the hot and cold side of the TEC, the power consumption of the fan, and other parameters were directly recorded through the measuring instrument. The results show that the use of new finned heat sinks can improve the COP of the thermoelectric refrigeration system. Within the scope of the study, the thermal resistance of the new fins can be reduced by , and the system COP value can be increased by . In addition, increasing the cooling wind speed can further reduce the cold side temperature. Within the research range, the lowest temperature can reach , but the power consumed by the fan is of that of the conventional fin heat sink refrigeration device.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Performance of the Thermoelectric Cooling Device with Novel Subchannel Finned Heat Sink

et al. 2021

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“…Over the years, several research and development initiatives have been made on the thermal performance enrichment of SAHs [39][40][41][42] After reviewing the various published articles on thermo-hydraulic performance enhancement, it may be summarized that the thermo-hydraulic performance of SAH depends on the change of artificial rough geometry [43][44][45][46]. In addition, for further enhancement in heat transfer, the potential differences in roughness have been utilized.…”

Section: Introductionmentioning

confidence: 99%

Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

Alam

Souayeh

2021

Sustainability

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In the present decade, research regarding solar thermal air heaters (SAHs) has noticed a continuous progression in thermo-hydraulic performance augmentation approaches. There now exists a wide variety of thermo-hydraulic performance augmentation approaches and researchers have designated various structures. Nevertheless, there seems to be no generalization to any of the approaches employed. The present numerical investigation reports on the thermo-hydraulic characteristics and thermal performance for flow through a varied length (full, medium, half, and short length) dimple solar air heater (SAH) tube. The study highlights recent developments on enhanced tubes to augment heat transfer in SAH. The influence of different length ratio, dimple height ratio (H), and pitch ratio (s) on thermo-hydraulic characteristics have been investigated in the Reynolds number (Re) range from 5000 to 25,000. Air is used as the working fluid. The commercial software ANSYS Fluent is used for simulation. The shear stress transport (SST) model is used as the turbulence model. Thermal energy transport coefficient is increased in the full-length dimple tube (FLDT), compared to the medium-length dimple tube (MLDT), half-length dimple tube (HLDT) and short-length dimple tube (SLDT). Similarly, the pitch ratio (s) has more influence on Nusselt number (Nu) compared to the dimple height ratio (H). The friction factor decreases with an increase in pitch ratio. Nu increases and f decreases with increasing Re for all combinations of H and s. Low s and higher H yields high enhancement of HT and PD. Integration of artificial roughness on the tube increases the values of Nu and f by 5.12 times and 77.23 times for H = 0.07, s = 1.0 at Re value of 5000 and 25,000, respectively, in regard to the plain tube. For all the tested cases, the thermo-hydraulic performances (η) are greater than unity.

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“…Additionally, the roles of heat transfer in dry/wet or sensible/latent heat loaded fins under steady or transient conditions were successfully highlighted (Das and Kundu, 2019;Wankhade et al, 2018 and. Alternative fins are the spines, whose roles in various physical configurations were thoroughly examined and explained in many experimental and numerical research activities, few of them are Bejan and Morega (1993), Zhou and Catton (2011); Pakrouh et al (2015), Chiu et al (2017); Hajmohammadi (2018), Huang et al (2018); Maji et al (2019) and Choudhary et al (2019).…”

Section: Introductionmentioning

confidence: 99%

An optimum profile of a special pin fin: full solutions

Türkyılmazoğlu

2020

HFF

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Purpose This paper aims to present an elegant exact solution in terms of elementary functions for a special pin fin without the classical length-of-arc approximation. Design/methodology/approach The temperature distribution along the fin and the surface function, both being the functions of a shape parameter, is inversely proportional to each other. The specialty of the spine is such that its shape and temperature profile are linked for a given Biot number. Findings Exact formulas for the pin fin tip temperature, pin fin base heat transfer rate, surface area of the spine and thermal fin efficiency are also given. Originality/value Without the traditional arc length assumption, the pin fin is shown to be an effective extended surface to remove the excessive heat from the hot surface it is pinned to. Optimum pin fin dimensions leading to the maximum base heat transfer rate are also worked out for a specified fin volume.

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Experimental investigation of enhanced performance of pin fin heat sink with wings

Cited by 67 publications

References 21 publications

Study on Performance of the Thermoelectric Cooling Device with Novel Subchannel Finned Heat Sink

Study on Performance of the Thermoelectric Cooling Device with Novel Subchannel Finned Heat Sink

Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

An optimum profile of a special pin fin: full solutions

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