Design Modifications and Analysis of Two Wheeler Water Cooling System

Engine life and effectiveness of the engine can be improved with effective cooling system. The cooling mechanism of the air cooled engine is mostly dependent on the fin design of the cylinder head and block. The heat is conducted through the engine parts and convected to air through the surfaces of the fins. Insufficient removal of heat from engine will lead to high thermal stresses lower engine efficiency. As the aircooled engine builds heat, the cooling fins allow the wind and air to move the heat away from the engine. Low rate of heat transfer through cooling fins is the main problem in this type of cooling. Heat transfer will be maximum only if the cooling medium with high heat transfer coefficient. In an air cooling system, heat transfer coefficient of air will be remaining same within the specific operating conditions. Hence, increasing of heat transfer coefficient of air is not possible. In order to increase the heat removal rate, it is convenient to change cooling medium to liquid. In this present work an effort is taken to improve the engine life and efficiency by replacing the existing air cooling system with water cooling system. For this work a150 cc four stroke SI has been chosen and suitable modifications are carried out. The heat transfer study of cooling system and engine efficiency are analyzed and compared with air cooling system.