EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER BY NATURAL CONVECTION ON ALLUMINIUM CASTED V-SHAPED FIN ARRAY (original) (raw)
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IRJET, 2022
Heat generation in different industrial devices is very common problem. Fins are commonly used to dissipate heat by natural or forced convection. Fins are employed on industrial devices such as heat exchanger, reciprocating compressor and engine, electric motor, transformer and many electronic devices. The material, dimensions and geometry of the fin is the challenging factor in today's scenario, as optimum fin geometry can enhance heat transfer rate. It is observed that many manufacturers are using different fin geometry to increase the heat transfer rate such as rectangular, triangular fins with notches etc. Recently, the research has been carried out on v-shaped fin array. The comparative study between rectangular fin array and v-shaped fin array shows that V-shaped fin array has large improvement on heat transfer rate. The basic objective of this experiment is to generate the experimental data for the V-shaped fin array carrying a force convection. Hence to analyze the heat transfer rate from the aluminum casted v-shaped fin array without slots on notches and with slots on notes by providing angles to the basic fin plate.
Heat Transfer Analysis through Fin Array by Using Natural Convection
2012
The main purpose of extended surfaces called fins to increase the heat transfer rate. Fins offer an economical and trouble free solution in many situations demanding natural convection heat transfer. Heat sinks in the form of fin arrays on horizontal and vertical surfaces used in variety of engineering applications, studies of heat transfer and fluid flow associated with such arrays are of considerable engineering significance. The main controlling variable generally available to designer is geometry of fin arrays. Considering the above fact, natural convection heat transfer from vertical rectangular fin arrays with and without notch at the center have been investigated experimentally and theoretically. Moreover notches of different geometrical shapes have also been analyzed for the purpose of comparison and optimization. In a lengthwise short array where the single chimney flow pattern is present, the central portion of fin flat becomes ineffective due to the fact that, already heated air comes in its contact. Many researchers have been studied the heat transfer rate through without notch and notched fins by using aluminum as a material. Verities of researchers were carried out, this paper focuses on heat transfer rate of copper fin for greater heat transfer rate which is need of increased rate of modernization thus extent of copper is tested. I.
S R Dixit, Dr D P Mishra, Dr T C Panda
Variables for natural convection cooling with the help of finned surfaces are orientation and Geometry. In lengthwise short array (L/H~5), where single chimney flow pattern is present, Stagnant zone is created at the central bottom portion of fin array channel and hence it does not contribute much in heat dissipation. Hence it is removed in the form of inverted notch and added at fin top to modify its geometry for enhancement of heat transfer. An experimental setup is developed for studying the investigation on normal and inverted notched fin arrays. The main purpose of extended surfaces called fins to increase the heat transfer rate. Fins offer an economical and trouble free solution in many situations demanding natural convection heat transfer. Heat sinks in the form of fin arrays on horizontal and vertical surfaces used in variety of engineering applications, studies of heat transfer and fluid flow associated with such arrays are of considerable engineering significance. The main controlling variable generally available to designer is geometry of fin arrays. Considering the above fact, natural convection heat transfer from vertical rectangular fin arrays with and without notch at the center have been investigated experimentally and theoretically. Moreover notches of different geometrical shapes have also been analyzed for the purpose of comparison and optimization. In a lengthwise short array where the single chimney flow pattern is present, the central portion of fin flat becomes ineffective due to the fact that, already heated air comes in its contact. Many researchers have been studied the heat transfer rate through without notch and notched fins by using aluminum as a material. Verities of researchers were carried out, this paper focuses on heat transfer rate of copper fin for greater heat transfer rate which is need of increased rate of modernization thus extent of copper is tested.
Heat transfer enhancement is the major research area in which many researchers are working to fulfill the need heat exchangers having high heat transfer abilities. This work consists of the study of heat transfer enhancement rectangular fin array at different inclinations. In this work angle of inclination of the fin array has been maintained at 0 0 , 30 0 , 45 0 , 60 0 and 90 0. This work is conducted for the experimental analysis of heat transfer from Rectangular fin array at different inclinations by natural convection. In this work fin arrays with different angles of inclinations are tested and their results are studied to find out their effect on the heat transfer from fin array. The results of this study shows that with change in angle of inclinations the heat transfer coefficient and the Nusselt number also changes. At 0 0 inclinations both the heat transfer coefficient and the Nusselt number has lowest magnitudes in entire study. At 45 0 inclinations both the heat transfer coefficient and the Nusselt number has highest values.
Review on Heat Transfer Enhancement by Rectangular Fin
International Journal of Engineering Materials and Manufacture, 2021
Heat generation of engineering appliances has bad effect in handling the system can cause the trouble, short life cycle of machines, frequent maintenance requirements and low reliability of systems. The passive cooling technique has been widely used to solve such problems. This review work summarizes the heat transfer enhancement technique in a rectangular fin with economic way. So many research about the enhancement of heat transfer by rectangular fins experimentally and numerically and found very significant result. In this review, various types of rectangular fin structures are studied simultaneously. It is revealed through reviewing the related literature that the highest value of equivalent heat transfer enhancement is found the increase in average heat transfer performance of inverted triangular notched fin 50.51% as compared with plane rectangular fin and the perforated fin total heat transfer rate increased by 38.9% compared to regular fin. Furthermore, by reduction of the o...
Computational Analysis of Heat Transfer by Natural Convection from Triangular Notched Fin Array
International Journal of Science Technology & Engineering
The purpose of this analysis is to find out the effect of making triangular notch at central base of fin on natural convection heat transfer. In case of horizontal fin arrays (L/H~5) [1], it is observed that the air entering from both the ends gets heated as it moves towards the centre of the fin channel, as well as it rises due to decrease in density. So, a stagnant zone is created at the central bottom portion of fin array channel and hence it does not contribute much in heat dissipation [1]. In this experimental investigation, material from this stagnant portion is removed in the shape of triangular notch from the central bottom portion of fin and added on top side to modify its geometry for analysis. The fin weight remains same. Three types of fin arrays have been analysed that are fin array with 0%, 20% and 40% notch. In this analysis heat input is varied from 50W to 200W in the interval of 50W analysis is done till steady state conditions. In this analysis decrease in heat transfer coefficient is observed for 20% and 40% notch fin than fin without notch.
Effect of the fins configuration on natural convection heat transfer experimentally and numerically
2015
The cooling of the electronic systems, electrical systems, and CPU of the computer is very important; therefore this study is prepared to improve this aims. In this study, natural convection heat transfer from rectangular fins with five different figures (continuous fins, 1-interrupted fins, 4-interrupted fins, inclined fins and V-fins) are investigated at different heat flux values (175, 350, 525, 700 and 875 Watt per square meter).The effect of base to ambient temperature difference for continuous fins, 1-interrupted fins, 4interrupted fins, inclined fins and V-fins were determined. All types of the fins are made with different geometries by using CNC machine and wire cut machine, but it have some dimensions in common such as fins thickness (5)mm, fins height (18)mm, space between the fins (10)mm, and the volume of the base plat of heat sink (300*95*2)mm. The heat sink base plate was heated by an attached maximum electric heater 2225 W/m 2 with an identical size with the base plat...
Thermal Analysis of Square and Circular Perforated Fin Arrays by Forced Convection
International Journal of Current Engineering and Technology, 2010
Heat dissipation is a drastic issue to tackle due to continued integration, miniaturization, compacting and lightening of equipment. Heat dissipaters are not only chosen for their thermal performance; but also for other design parameters that includes weight, cost and reliability, depending on application. The present paper reports an experimental study to investigate the heat transfer enhancement over horizontal flat surface with rectangular fin arrays with lateral square and circular perforation by forced convection. The cross sectional area of the rectangular duct was 200 mm x 80 mm. The data used in performance analysis were obtained experimentally for fin arrays of material aluminum, by varying geometry and size of perforation as well as by varying Reynolds number from 21 10 4 to 8.7 10 4. It is observed that the Reynolds number and size perforation have a larger impact on Nusselt number for the both type of perforations.
Fins are used to sink heat from a system and keep that in working condition. Fins are extended surfaces which are used to cool various structures via the process of convection. Heat sinks with fins are generally used to enhance the heat transfer rate in many industrial applications such as cooling of electronic, power electronic, telecommunication and automotive components etcetera. In many situations where heat transfer is by natural convection fins offer economical and trouble free solutions. Heat indulgence techniques are the prime concern to remove the waste heat produced by systems, to keep them within permitted operating temperature limits. Heat indulgence techniques include heat sinks, fans for air cooling, and other forms of cooling such as liquid cooling. Generally heat transfer by fins is basically limited by the design of the system. But still it may be enhanced by modifying certain design parameters of the fins. Hence the aim of this paper is to study from different literature surveys that how heat transfer through extended surfaces (fins) and the heat transfer coefficient affected by changing cross-section, climatic conditions, materials, design, weight etcetera. The objective of this paper is to present a best possible aperture pin fin and throughout hollow slot pin fin design for efficient cooling of a system in addition with apertures and their enlargement and how the conduction decrease with increase in convection.
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/experimental-investigation-for-optimizing-fin-spacing-in-horizontal-rectangular-fin-array-for-maximizing-the-heat-transfer-under-a-natural-and-forced-convection https://www.ijert.org/research/experimental-investigation-for-optimizing-fin-spacing-in-horizontal-rectangular-fin-array-for-maximizing-the-heat-transfer-under-a-natural-and-forced-convection-IJERTV3IS071160.pdf A systematic experimental investigation of the fin spacing for the given fin height, fin length , for the width of array and heat input on free and forced convection heat transfer from horizontal fin array was carried out. A horizontal rectangular fin array with aluminum fin and aluminum spacer is constructed in which the distances between the fins are varied with adding or removing the spacers of different thickness between the fins. The objective of this experimentation is to determine the optimum spacing in which the maximum heat transfer is taking place by natural and forced convection at different heat input and at different wind velocity.