 | Building this torch (flashlight) helps to understand how it is possible to transform mechanical energy into electricity. This type of transformation is achieved in most of our power plants. This DIYs project reveals all the components of an electric generator. By using a small electric motor ... »
torch, flashlight, transform, generator, motor
| | Note |  | | Difficulté |  | | Durée | 3h 0 min. | | Date | 16.05.2013 | | Langue(s) | français deutsch english |
|
 | The use of sun energy is not limited to photovoltaic cells for electricity or solar thermal collectors for heating. Other ideas exist, often still experimental, like the solar chimney. A huge project of this type is planned in Australia with a tower 1 km high! The construction of a solar chimney ... »
photovoltaic, collectors, chimney, greenhouse, absorption
| | Note |  | | Difficulté |  | | Durée | 3h 0 min. | | Date | 16.05.2013 | | Langue(s) | français deutsch english |
|
 | Making a battery helps to understand how a chemical reaction can produce electricity. It shows also that in a battery there is no real stock of electricity, but the chemical products needed to generate some. It is important to understand how batteries work as they are more and more used in our daily ... »
batteries, pads, polluting, kilowatt-hour, mains
| | Note | | | Difficulté |  | | Durée | 3h 0 min. | | Date | 16.05.2013 | | Langue(s) | français deutsch english |
|
 | The construction of a parabolic solar cooker helps to understand how it is possible to concentrate the solar rays to reach higher temperatures. This technique is used in experimental power plants in California and France. These plants use a field of mirrors that concentrate rays to a single point ... »
parabolic, rays, mirrors, tank, turbines
| | Note | | | Difficulté | | | Durée | 0h 0 min. | | Date | 15.05.2013 | | Langue(s) | français deutsch english |
|
 | Building a solar boat helps to understand how photovoltaic solar cells can be used to produce electricity. Toy using solar cells represent often machines that do not exist or which are not logical. It is not uncommon indeed to find toys of helicopters or windmills powered by photovoltaic cells. ... »
photovoltaic, windmills, powered, geneva
| | Note | | | Difficulté | | | Durée | 3h 0 min. | | Date | 14.05.2013 | | Langue(s) | français deutsch english |
|
|
