International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Thermal Study of Fins In Light Weighted Automobile Vehicles Gourav Sharma1, Dr. Pankaj Agarwal2, Ankit Sharma3 1Scholar, 2Professor
Mechanical Engineering Department, S.A.T.I. Vidisha, chgourav.40@gmail.com & Head, Mechanical Engineering Department, S.A.T.I. Vidisha, dr_pankajagarwal@rediffmail.com
3Scholar,
Dept. of Electrical Engineering, MITS college, Madhya Pradesh, India, pandit.ankit42@gmail.com
---------------------------------------------------------------------***--------------------------------------------------------------------2. Working Principle of Fins Abstract – The presented paper deals with the design of fins on the cylinder of four stroke single cylinder SI engine. The main objective of design is to provide the maximum cooling which will result in producing highly efficient engine system. The significant specific data of the engine cylinder is the compression ratio of the cylinder, bore diameter, stroke length, front tyre & the rear tyre size, maximum torque, volume of the cylinder, economic speed at the highway. The analytical process is to examine the effectiveness of the fins and provides the suitable dimensions are to maximize the cooling and to maintain the engine cylinder.
As fins are mainly works on principle of heat transfer through convection [2] .In convection type f heat transfer, heat is transfer from one portion of fluid to another. As fluid is heated by wasted heat energy, its heated molecule will going to rise up and the colder molecules will go down and gradually heat is distributed throughout the volume. Mathematical equation of convection heat transfer [3], Qconv = hAs (Ts − T∞)
(1)
Key Words: Efficiency, Effectiveness, Convection, Heat transfer, Thermal Analysis.
Here,
1. INTRODUCTION
h= Heat transfer coefficient in Joule/ (0C×m2)
In this era of automobile engineering our life has been very much dependent on internal combustion based vehicles. Though there are other energy sources vehicles are too present around us viz. Compressed Natural Gas (CNG), Liquid Petroleum Gas (LPG) and electrical vehicles. All these vehicles convert their respective power chemical or electrical into mechanical energy to provide mechanical torque and power. All these energy converted from one form to another one through an engine. Many scientific principles unveiled that not even a single system in this world have hundred percent efficiency.
As= exposed surface area of fin (m2)
Similarly internal combustion engine work on efficiency about 50 percent [1] even the world’s largest diesel based engine has efficiency of 51.7 percent. The remaining 50 percent energy is going to convert into heat. This heat produced in engine is going to damage it. So it must be radiated out.
Heat transfer coefficient is depending upon following aspects:
Ts= surface temperature of engine (0C) T∞= temperature of surrounding (0C) From equation 1, it is clear that rate of convective heat transfer is directly depend upon coefficient of convective heat transfer and surface area of engine exposed to surrounding. It is not feasible to increase surface area of engine, so we can increase coefficient of heat transfer to increase convective heat transfer.
There are three modes of heat transfer viz. conduction, convection and radiation. Most of the engines transfer their waste heat into environment through convection by using an extended surface perpendicular to the axis of engine. This extended surface on engine is called fins, fins are of different designs and materials depending upon the amount of heat generation and heat transfer. © 2017, IRJET
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Impact Factor value: 5.181
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Geometry of exposed surface Temperature difference between engine surface and surrounding Convective velocity of fluid By extending the surface area of engine, which is called fins. By using Al material which has high transfer coefficient.
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