ISSN: 2277-9655 [Arage* et al., 6(4): April, 2017] Impact Factor: 4.116 IC™ Value: 3.00 CODEN: IJESS7 http: // www.ijesrt.com© International Journal of Engineering Sciences & Research Technology [302] IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY EXPERIMENTAL ANALYSIS OF HEAT TRANSFER FROM RECTANGULAR FIN ARRAY AT DIFFERENT INCLINATIONS BY NATURAL CONVECTION Shrikant G. Arage * , Dr. Avinash M. Patil, Nikhil S. Mane * PG student Mechanical Engg. Department, PVPIT Budhgaon, India Asso. Professor, Mechanical Engg. Department, PVPIT Budhgaon, India Assistant Professor, Mechanical Engg. Department, PVPIT Budhgaon, India DOI: 10.5281/zenodo.546346 ABSTRACT 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. KEYWORDS: Fins, Heat Transfer Enhancement, Angular Inclination, Extended surfaces. INTRODUCTION Fins are used to enhance convective heat transfer in a wide range of engineering applications, and offer a practical means for achieving a large total heat transfer surface area without the use of an excessive amount of primary surface area. Natural convection heat transfer can be enhanced by using fins of various shapes and sizes but rectangular fins are usually used because of their easy installations and manufacturing. [1] To increase further heat transfer rate from the fin, research on different techniques is carried out by different researchers. There are many passive techniques of heat transfer enhancements like inserts, extensions etc which can effectively enhance the heat transfer rates [2][3]. Also heat transfer enhancement by pin elements and porous fin will also leads to higher heat transfer rates with low weights of fins [4][5][6]. This work consists of the study of heat transfer enhancement rectangular fin array at different inclinations. In this study heat transfer from rectangular fin array will be studied for different angles of inclinations of fin array. First heat transfer from a fin array at horizontal position is studied then the angular position of the fin array will be changed and it is made inclined then effect of this inclination on heat transfer from fin will be studied. In this way effect of inclination of fin array will be studied in this work. FIN ARRAY In this work a fin array is used as a heat transfer surface from heater to the air. The heater is placed in the middle of the fin array as shown in the fig. 1 heat from this heater will travel through the fin array and it will be finally removed by the air. This fin array has five fins on each side of the heater. The material of this fin array is aluminium alloy. The height of each fin is 20 mm and thickness is 2 mm. The base area of the fin array is 75*110 mm 2 . The total surface area of the fin array is 0.06218 m 2 .