Instead of simply wiping raindrops off our car windscreens, why not collect and reuse the water via the washer jets?

 

Brother and sister Daniel and Lara Krohn were travelling in the family car last summer when the heavens opened. But when their dad Gerd, who was driving, tried to clear away the smears, the reservoir was empty – and the windscreen just got dirtier and dirtier.

The two clever kids’ idea to capture the raindrops and reuse them won first prize in a local science competition and has now been developed for a full-sized test car.

“It was a downpour. There was water everywhere – except in the windscreen wiper reservoir. My sister and I thought this was really funny and then the answer suddenly seemed obvious. Simply reuse the rainwater,” said 11-year-old Daniel, from Jülich, in Germany.

“We couldn’t believe that no-one had thought of it before,” added 9-year-old Lara. “To try it out, we took apart our toy fire engine and fixed the pump to a model car inside an aquarium. Then we added a filtering system to ensure the water was clean. It just worked really well.”

Learn more about the innovative project in this video.

Photo credits: Kaique Rocha // CC0 Licence