Hand Operated Mechanical Coffee Heater

Abstract

The mechanical heater is purely based on the frictional concept. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Friction is not always unwanted. Friction is required for us to walk. Winter car tires usually have deeper treads than regular tires. The extra grooves make the surface rougher and help them get a grip on ice and snow. Here the heat generated by friction is utilized. In this model, the heat is generated due to surface friction between the brake lining and steel Cup. There are two form of heat transfer take place namely conduction in steel cup and Convection from steel to solution. Heat transfer takes place as conduction initially from brake linking to cup by conduction. From the surface of the cup to the liquid inside the cup, heat is transferred mainly by convection. The simple hand drill equipment is used to increase the speed of rotation of the outer cup. This equipment is only hand operated and hence will not require any electricity or fuel to run. Generating friction by rotation of gears manually and in turn, rotates a disc which would be in contact with another stationary disc. The heat will be generated as a result of friction another stationary disc should be a container a vessel side portion so that when the disc is in friction with the vessel surface, the heat generated can be used for heat the water or coffee contained in the vessel. Hence it can be used in very cold countries or near Polar Regions to easily heat a cup of coffee.