Revolving doors producing green energy

Renewable energy is the energy which comes from natural recourses such as sun light, wind, rain, tides and geothermal heat which are naturally replenished. Wind energy, solar energy, biomass, bio-fuel and geothermal energy are the main types of renewable energies used nowadays. All forms of energy are expensive but as time progresses renewable energy generally gets cheaper, while fossils fuels generally gets more expensive. As it is renewable, it is therefore sustainable and so will never run out. Renewable energy has minimal impact on the environment. Revolving doors can be used for harnessing power generation from wasted human effort applied for opening the door. Since human effort applied on the door is inexhaustible, so we can use revolving door as a new form of renewable energy. Revolving doors which mark the prestige and glamour of building can be efficiently harnessed for power generation. It captures wasted human energy and converts into suitable power source. Though it is not a major production of power but it is a step forward in the direction of renewable energy. This is also used for preventing the global warming and emission of harmful gasses. Today mostly used renewable energy resources are solar energy, wind energy. It is economical, independent, easy to harness and produce electricity can be used for charging batteries, LED'S and CFL bulbs. Concept used in this mechanism is similar to turbine used in hydroelectric dam or wind turbine to generate electricity. In this mechanism we used revolving door with three wings and Techtronic system which consists of gear mechanism and motor generator to generate electricity. The prototype which we have made is producing 110 watts and the total output will depend on frequency of people passing through the door. We can also optimize the power by varying various parameters like width of the door, mass of the door and gear ratio. With the prototype we have chosen width as 2.5 feet and gears are placed at distance of IS cm from fulcrum i.e. centre shaft. So the lever ratio obtain in this case is 1:5. Hence the torque at gear is 15 N-m but due to longer lever arm it become 3 N-m at door. We have found that as applied torque increases the power produced from motor is also increased but up to motor rating , and for the same applied torque power produced can be increased by increasing the width of the door.