DESIGN OF A COOLING SYSTEM FOR AN EXISTING FOOD EXTRUDER

 ABSTRACT

Food extrusion is one of the earliest methods adopted by most industries to convert their paste raw material to a finished and desire shape based on their of an extrusion machine. Extrusion technique is a process in food processing technology that combines several unit operations including cooking. kneading. shearing. shaping and forming. The machine that forces the mix through the die is an extruder and the mix is known as extrudate. The extruder consists of large, rotating screw tightly fitting with a stationary barrel at the end, which is a die. This project is borne out of need to control the heat generated by frictional dissipation of a cooking extruder on crops., since different crops has different temperature and rate at which heat is generated for each differs. To avoid burnt during the extrusion process, a cooling system is required to actualize the desire end product by controlling the temperature generated which can lead to burning, puffing of the raw materials and end products. The component of the cooling system, which include; radiator, heat exchanger, reservoir, water pump, fan.hose and distribution pipes.