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Adiabatic solar air conditioner

This DIYs project shows how to build an ecological air conditioning system. The electricity of the fan is generated by a photovoltaic cell and the air is cooled simply by evaporating water. Conventional air conditioners are very energy consuming. They work like a fridge and need a lot of ... »
ecological, conditioning, photovoltaic, cooled, evaporating
Note
Difficulté
Durée3h 30 min.
Date17.05.2013
Langue(s)français deutsch english

Chemical battery

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
Durée3h 0 min.
Date16.05.2013
Langue(s)français deutsch english
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