The Effect of Circular Perforation on a V-Corrugated Fin Performance under Natural Convection (original) (raw)
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THE IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING, 2018
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...
Experimental Study of the Perforated Rectangular Fins by Natural Convection
The importance of heat transfer by natural convection can be found in many engineering applications, such as energy transfer in buildings, solar collectors, nuclear reactors and electronic packaging. This study examined heat transfer enhancement from a vertical rectangular fin embedded with circular perforations under natural convection compared to the equivalent solid (non perforated) fin. The parameters considered were geometrical dimensions and thermal properties of the fin and of the perforations. The study considered the gain in fin area and extent of heat transfer enhancement due to perforations. It showed that for circular dimension perforations there is an improvement in perforated fin heat dissipation over that of the equivalent non perforated solid fin.
Effect of Percentage of Perforation on the Natural Convection Heat Transfer from a Fin Array
Abstract— In this study, the steady-state natural convection heat transfer from vertical rectangular fins extending perpendicularly from vertical rectangular base was investigated experimentally. The effects of perforations and base-to-ambient temperature difference on the heat transfer performance of fin arrays were observed and optimum value of perforation is suggested. The experimental set-up was employed during experiments in order to take measurements from 4 different fin configurations. The base and the ambient temperatures were measured in order to evaluate the heat transfer rate from fin arrays. The results of experiments have shown that the convection heat transfer rate from fin arrays depends on all percentage of perforation and base-to-ambient temperature difference. The effect of these parameters was also examined, and it was realized that for a given base-to-ambient temperature difference, the convective heat transfer rate from the fin array is maximum for 30% perforated fin array.
2016
The main objective of this study is to understand the effect of number of perforations on convective heat transfer experimentally investigated. Perforations in the fins are one way that used to improve its effectiveness. In this study, the steady state heat transfer from the solid fin and perforated fin arrays are measured. The temperature drop along the perforated fin length is consistently higher than that for the equivalent non-perforated fin. The inlet temperature of the cylinder core was in the rage of 353 o C-953 o C for voltage range 100 V to 220 V. The heat transfer depends on the porosity of the fin. Heat dissipation rate is increased in the range of 20% to 70% with increase in the number of perforations (24 to 60) up to certain level. If further increase in perforation numbers this leads to reduction of the heat dissipation from the fin.
European Journal of Engineering Research and Science
The importance of heat transfer by free natural convection can be found in many engineering application such as energy transfer in buildings, solar collectors, nuclear reactors and electronic packaging. In this research work, we carried out the investigation and comparative analysis of heat transfer by natural convection on rectangular and triangular fins with and without circular perforation. A total of six (6) specimens were used. Other materials that were used in this research work include four digital thermometers, one heating element, four thermocouple K-type and a power source. The fins used in this research work were welded to a cylindrical pipe which served as the heat sink. The heat supplied was maintained at 2500C and the temperature drop through the fin was recorded for duration of 30minutes with intervals of 5minutes. It was observed that the temperature dropped more rapidly with the triangular fins than the rectangular fin. Also, the rate of heat dissipation increas...