THE EFFECT OF FINS PERFORATION AND MATERIAL TYPE ON THERMAL PERFORMANCE OF A HEAT SINK UNDER NATURAL CONVECTION

An experimental study was done to investigate the effect of fin geometrymodification and material type on heat dissipation from a heat sink under natural convection.v-corrugated solid fin and v-corrugated perforated fin were designed for this purpose.Aluminum and Copper metals were selected in designing the fins because their wideapplication in cooling and heating equipment. Three different voltages 110, 150 and 200 Vsupplied to the heat sink to study their effects on the fins performance. Each experimentrepeats two times to reduce the error and the data recorded after reaching the steady stateconditions. The utilization of solid and perforated v-corrugated fins is compared. The resultsshowed that perforated fins dissipated heat more than corresponding solid by 15.4, 34 and32% for aluminum, and 2.7, 2.1 and 4.3% for copper fin in the three voltages. Also, theresults indicated that the heat loss by solid copper fin is greater by 56, 72 and 92% thancorresponding solid aluminum fin and for perforated fin case by 38, 31.7 and 51.9 % at110,150 and 200 V respectively.

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Experimental Study on Evaporative Heat Sink

Volume 8B: Heat Transfer and Thermal Engineering ◽

10.1115/imece2013-64370 ◽

2013 ◽

Author(s):

Moo Joong Kim ◽

Sangjin Kim ◽

Kuen Tae Park ◽

Hyun Jung Kim ◽

Dong-Kwon Kim

Keyword(s):

Experimental Study ◽

Thermal Performance ◽

Heat Sink ◽

Heat Dissipation ◽

Copper Plate ◽

Heat Sinks ◽

Water Evaporation ◽

Industrial Systems ◽

Sintered Copper ◽

Fin Spacing

The heat sinks are used to dissipate heat from electronic and industrial systems. In the present study, in order to overcome limitation of traditional heat sink, we suggest and experimentally investigate new concept of heat sink which use evaporation of water. The heat sink is made from sintered copper plate and absorbs supplied water like sponges by capillarity-driven wetting. The absorbed water evaporates at the surface of heat sink and the surface temperature is dropped due to the latent heat of water evaporation. In this study, we experimentally compare the heat dissipation performance of the suggested heat sink with traditional heat sink. And we investigate the performance of heat sink made from the sintered copper plate with various particle radius and porosities. Finally, we find the fin spacing, at which the thermal performance is maximized.

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An Investigation of the Effect of interrupted fin arrangements on the Thermal Performance of a Heat Sink under a Free Convection Condition

Wasit Journal of Engineering Sciences ◽

10.31185/ejuow.vol7.iss1.113 ◽

2019 ◽

Vol 7 (1) ◽

pp. 43-53

Author(s):

Abbas Jassem Jubear ◽

Ali Hameed Abd

Keyword(s):

Heat Transfer ◽

Steady State ◽

Natural Convection ◽

Thermal Performance ◽

Heat Sink ◽

Numerical Study ◽

Ansys Fluent ◽

Fluent Software ◽

Steady State Heat ◽

Steady State Heat Transfer

The heat sink with vertically rectangular interrupted fins was investigated numerically in a natural convection field, with steady-state heat transfer. A numerical study has been conducted using ANSYS Fluent software (R16.1) in order to develop a 3-D numerical model. The dimensions of the fins are (305 mm length, 100 mm width, 17 mm height, and 9.5 mm space between fins. The number of fins used on the surface is eight. In this study, the heat input was used as follows: 20, 40, 60, 80, 100, and 120 watts. This study focused on interrupted rectangular fins with a different arrangement and angle of the fins. Results show that the addition of interruption in fins in various arrangements will improve the thermal performance of the heat sink, and through the results, a better interruption rate as an equation can be obtained.

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Investigating the effect of various fin geometries on the thermal performance of a heat sink under natural convection

Heat Transfer ◽

10.1002/htj.21866 ◽

2020 ◽

Vol 49 (8) ◽

pp. 5038-5049

Author(s):

Vinous M. Hameed ◽

Maha A. Hussein ◽

Hussein T. Dhaiban

Keyword(s):

Natural Convection ◽

Thermal Performance ◽

Heat Sink

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Experimental study of the effects of nanofluids on wicking ability and thermal performance of a vertical open microgrooves heat sink

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2019.118674 ◽

2019 ◽

Vol 144 ◽

pp. 118674 ◽

Cited By ~ 6

Author(s):

Rong Fu ◽

Xuegong Hu ◽

Yuying Yan ◽

Wenbin Zhou ◽

Honghui Wu ◽

...

Keyword(s):

Experimental Study ◽

Thermal Performance ◽

Heat Sink

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Thermal Performance of Solar Collectors with EPDM Absorber Plates

Australian Journal of Physics ◽

10.1071/ph880623 ◽

1988 ◽

Vol 41 (4) ◽

pp. 623

Author(s):

MJ O'Keefe ◽

JLA Francey

Keyword(s):

Experimental Study ◽

Thermal Resistance ◽

Flat Plate ◽

Heat Loss ◽

Thermal Performance ◽

Critical Value ◽

Solar Collectors ◽

Flow Rates ◽

Mass Flow Rates ◽

High Thermal Resistance

An experimental study of flat-plate solar collectors using ethylene, propylenediene monomer (EPDM) absorber plates is descn"bed. In spite of the high thermal resistance of this material the performance is found to compare well with metal absorbers and to be in agreement with the Hottel-Whillier-Bliss equation. There is, however, an observed increase in the heat loss coefficient for mass flow rates below a critical value.

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Experimental Investigation of a PCM-Based Topology Optimized Heat Sink for Passive Cooling of Electronics

ASME 2020 Heat Transfer Summer Conference ◽

10.1115/ht2020-9143 ◽

2020 ◽

Author(s):

Jin Yao Ho ◽

Kai Choong Leong

Keyword(s):

Thermal Performance ◽

Heat Sink ◽

Heat Dissipation ◽

Volume Fraction ◽

Solid Volume Fraction ◽

Heat Fluxes ◽

Heat Sinks ◽

Base Temperature ◽

Storage Unit ◽

Cooling Of Electronics

Abstract A thermal energy storage unit filled with phase change material (PCM) can serve as a heat sink for the cooling of electronics with intermittent or periodic heat dissipation rates. The use of thermal conductive structures (TCS) is an effective method of improving the thermal performance of a PCM-based heat sink. In this paper, topology optimization is explored to develop a new class of TCS with a tree-like structure to enhance the thermal performance of a trapezoidal heat sink. The topology-optimized heat sink was then fabricated by Selective Laser Melting (SLM) using an aluminum alloy, AlSi10Mg, as the base powder. Experiments were performed to evaluate the thermal performance of the topology-optimized heat sink with the tree-like structure. In addition, a conventional longitudinal-fin heat sink of the same solid volume fraction (φ = 16.2%) and a heat sink without enhanced structure were also fabricated and experimentally investigated for comparison. Rubitherm RT-35HC paraffin wax was used as the PCM. Three different heat fluxes of 4.00 kW/m2, 5.08 kW/m2 and 7.24 kW/m2 were applied at the base of each specimen by a silicone rubber heater. The structure wall and the PCM temperatures were measured over time. Our results show that, for all heat rates tested, the topology-optimized heat sink was able to maintain a lower base temperature as compared to the fin-structure and the plain heat sinks. A thermal enhancement ratio (ε) is defined to evaluate the performance of the heat sinks with and without the use of PCM. From the experimental results, the highest ε value of 8.6 was achieved by the topology-optimized heat sink. These results indicate the better performance of the topology-optimized heat sink in dissipating heat as compared to the other specimens.

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Wood-Burning Stoves in Well-Insulated Dwellings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1041.371 ◽

2014 ◽

Vol 1041 ◽

pp. 371-374

Author(s):

Radoslav Ponechal ◽

Jaroslav Leštach

Keyword(s):

Temperature Measurement ◽

Heat Loss ◽

Air Temperature ◽

Thermal Performance ◽

Specific Problem ◽

Building Structures ◽

Heating Equipment ◽

Wood Burning ◽

The Future

New requirements for the thermal performance of building structures also affect heating equipment solutions. A specific problem is the future of the local heaters in the following well-insulated houses in terms of overheating. This paper discussed some results of the dry bulb air temperature measurement in one of these houses. The article further reported list of the local wood-burning stoves with respect to the calculated heat loss in these houses isolated on the requirements of the standard in 2016 and in 2021.

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