 | Solar energy is commonly used to produce hot water or electricity for our buildings. Another, lesser known use is for drying food.This technology allows fruit, vegetables, fish or meat to be dried without the use of fossil fuels and pollutants. With less moisture, food can be stored for long ... »
drying, fossil, fuels, pollutants, moisture
| | Note |  | | Difficulté |  | | Durée | 3h 0 min. | | Date | 25.07.2022 | | Langue(s) | |
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 | In the Toules dam near the Great St. Bernard pass (Switzerland), an artificial island with 2,240 m2 of photovoltaic solar collectors has been built. In the canton of Glarus (Switzerland), the wall of the Muttsee dam has been covered with solar cells. These high-altitude solar power plants offer ... »
photovoltaic, collectors, high-altitude, altitudes, cloud
| | Note | | | Difficulté |  | | Durée | 2h 30 min. | | Date | 22.07.2022 | | Langue(s) | |
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 | This project demonstrates that it is possible to use the heat of the sun to produce a movement. The technical principle consists of boiling a liquid (e.g. water) in a closed tank using solar energy. To obtain a temperature sufficient to boil water, parabolic mirrors are used to focus the sun's rays ... »
boiling, tank, boil, parabolic, mirrors
| | Note |  | | Difficulté | | | Durée | 2h 0 min. | | Date | 22.07.2022 | | Langue(s) | |
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 | This project helps to understand how the greenhouse effect can be used to 'trap' the heat of the sun. The sun's rays (short wavelengths of visible light) penetrate through the glass of the oven and heat the elements inside. When this heat is reissued as infra-red radiations (longer wavelengths) ... »
greenhouse, trap, rays, wavelengths, penetrate
| | Note | | | Difficulté |  | | Durée | 2h 0 min. | | Date | 22.07.2022 | | Langue(s) | |
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 | This solar pendulum demonstrates different scientific principles : Concentration of sunlight rays with reflectors Greenhouse effect and absorption of solar radiation by dark colours Expansion and contraction of water due to temperature changes Transformation of solar thermal energy into ... »
pendulum, sunlight, rays, reflectors, greenhouse
| | Note | | | Difficulté | | | Durée | 3h 0 min. | | Date | 22.07.2022 | | Langue(s) | |
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