 | Building a parabolic solar grill helps to understand the principle of sunlight concentration. This technique is already used in experimental solar power plants. Parabolic mirrors focus the Sun's rays on black pipes in which water circulates. The heated water expands and turns into steam ... »
parabolic, sunlight, mirrors, rays, pipes
| | Note |  | | Difficulté |  | | Durée | 0h 30 min. | | Date | 31.05.2013 | | Langue(s) | |
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 | The construction of a solar hot water panel helps to understand how it is possible to heat water with the Sun. The basic principle is to circulate water in a black pipe placed behind a glass exposed to the Sun. Thanks to the greenhouse effect and the black colour that absorbs most of the Sun's rays, it is ... »
circulate, pipe, greenhouse, absorbs, rays
| | Note | | | Difficulté | | | Durée | 2h 30 min. | | Date | 31.05.2013 | | Langue(s) | |
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 | Bulding a bicycle electricity generator helps to understand how it is possible to produce electricity from a magnet, a copper wire coil and a movement. This technique found in traditional bicycle dynamos is also used in electric power stations. Unfortunately less bicycles are equiped with ... »
bicycle, generator, magnet, wire, coil
| | Note |  | | Difficulté |  | | Durée | 3h 0 min. | | Date | 24.05.2013 | | Langue(s) | |
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 | Building this DIYs project helps to understand how wind turbines work and generally how to transform a mechanical movement into electricity. This principle can be found in devices we use every day (bicycle dynamo, car alternator, etc.). The same principle is also used by most of our electricity ... »
turbines, transform, bicycle, dynamo, alternator
| | Note | | | Difficulté |  | | Durée | 2h 0 min. | | Date | 24.05.2013 | | Langue(s) | |
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 | Building a solar torch (flashlight) helps to understand how it is possible to store the energy of the Sun and use it later at night. photovoltaic cells transform the energy of the sun in electricity that can be stored in a rechargeable battery. Photovoltaic cells are now widely used and can be even ... »
torch, flashlight, photovoltaic, transform, rechargeable
| | Note | | | Difficulté | | | Durée | 2h 30 min. | | Date | 17.05.2013 | | Langue(s) | |
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