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Individualised Study Options
Transcript of Individualised Study Options
ISO 2011 Project Intro
Design and Technology
Project Intro Design and Technology Research Done Methodology Literature Review Thank You Mark Wong
David Chian Environmental Project Mark Wong
CVK Abhiroop Focus: Clean Energy The need for new energy sources has become a major factor in recent years Fossil fuels are getting scarce Renewable energy viewed as a solution Harmful environmental effects Kinetic energy is one of the most common sources of clean energy But obtaining kinetic energy is by no means easy The key would then be to find a source of Kinetic energy Convenient Has a considerable scope Impact on Environment The Dynamo Attached Fan A feasible source of kinetic energy: Project Scope and impact on environment Fans produce a tremendous amount of kinetic energy due to their rotations Chanelling and converting this kinetic energy would produce a tremendous amount of energy Dynamo: A device which has the capability to convert kinetic energy into electrical energy Average fan rotations can be up to 500 rotations per minute The average fan runs for 4hrs a day Thats 12000 rotations per day There are an Average of at least 5 fans in every household Singapore is currently estimated to have 1 324 021 households Thats a tremendous energy produced Presenting... Ideas to Action Thats 60 000 rotations per household per day Thats 6 000 000 000 000 rotations in singapore per day Mechanics of a dynamo Dynamo-Attached Fan Attach the Dynamo to the shaft of the fan As the fan blades turn The rotating motion will inturn spin the coil of wire around the magnet core Mechanics of a fan Process Decide area of focus Specify Environmental problem Devise broad solution Detailed designing of solution Finalise technological aspect of solution Further research on scope of project Draw conclusions on project impact on environment Lit review and cross referencing This creates an electrical charge Which will be channeled to other sources This way for more info Bibliography This energy is harnessed and can be directed to another source, say a battery Dynamo principle Cross section of fan The movement of a body is transmitted to a rectangular coil of wire that is inside a U-Shaped magnet. Causing a rotating motion of this coil of wire which cuts the magnetic flux in the magnet. Dynamo diagram Whenever there is a change in magnetic flux linked with a circuit, an induced current is produced and the strength of this induced current is directly proportional to the rate of magnetic flux This rule can be seen practically in a bicycle that has a dynamo. The faster the rider rides the faster the change in magnetic flux and hence the brighter the light The motion providing body in particular, is the fan A fan is a device that is used to cut the flow in a liquid, say air Fan blades cut the air to redirect
the wind to you
A fan blade will often rotate when exposed to an air stream, and devices that take advantage of this, such as anemometers and wind turbines, often have designs similar to that of a fan. In machines that already have a motor, the fan is often connected to this rather than being powered independently. The End en.wikipedia.org/wiki/Dynamo www.exege.com/dynamos http://wiki.answers.com/Q/How_does_a_dynamo_work http://news.softpedia.com/news/How-Dynamo-039-s-Work-91306.shtml www.howeverythingworks.org/electric_motors.html http://www.singstat.gov.sg/stats/keyind.html en.wikipedia.org/wiki/Ceiling_fan "A fan motor has an aluminum rotor that spins inside a framework of stationary electromagnets. These electromagnets are arranged and operated so that their magnetic poles seem to rotate around the aluminum rotor. These moving/changing magnetic poles induce currents in the aluminum rotor, making that rotor magnetic, and the rotor is dragged along with the rotating magnetic poles around it. After a few moments of starting, the spinning rotor almost keeps up with the rotating magnetic poles." http://www.howeverythingworks.org/electric_motors.html "By moving a magnet next to a closed electric circuit, or changing the magnetic field passing through it, an electric current could be "induced" to flow in it. That "electromagnetic induction" remains the principle behind electric generators, transformers and many other devices." <- Faradays law (principle behind a dynamo) http://www.iki.rssi.ru/mirrors/stern/earthmag/dynamos.htm A dynamo in basic form consists of a powerful field magnet between the poles of which a suitable conductor, usually in the form of a coil (armature), is rotated. The magnetic lines of force are cut by the rotating wire coil, which induces a current to flow through the wire. The mechanical energy of rotation is thus converted into an electric current http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0015973.html