La plate-forme collaborative de bricolages scientifiques et pédagogiques
FR | DE | EN

Adiabatic solar air conditioner

Note (?)
Difficulté (?)
Durée (?)3h 30 min.
Coût (?)~25 CHF
Languefrançais deutsch english
License (?)

This 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 electricity to compress a gas inside a closed circuit.

Another solution which uses far less energy is to evaporate water to cool the air. When evaporating, water removes heat from the surrounding air which then gets cooler.


This principle is already used to cool buildings in a more environmentally friendly way (adiabatic cooling). The efficiency of this system varies depending on the humidity of the outdoor air and should be used in very well designed buildings (well insulated with good sun protections for example).





Report the cone model on the plastic sheet (use the model twice to create the entire cone). ...
Form a cone and staple it.
Cut the upper part of the PET bottle with a pair of scissors. Position this part on the top ...
according to the illustration :   Cut a rectangle from the rest of the transparent p ...
Form a cylinder and stapple it.
Drill a hole at 2 cm from the top of two wood slats.   Nale the two slats on the sm ...
Wrap the electric motor with 3 plastic cable ties. Pass the ties through the notches in the cy ...
To avoid that the cable ties slide out, you can staple them to the cylinder aft ...
Using screws, bolts and washers, fix the cylinder between the two slats (passing through the h ...
Connect to one of the contacts of the motor an electric wire using a small cable end connector ...