Researchers at the German University in Cairo developed two systems to keep solar panels free of desert dust. A company founded by engineer Hossam Mohamed commercialised the idea and the first commercial installation was placed in Cairo’s Fifth Settlement about a month ago. Early results are promising.
The electrically driven system uses a small motor and an unbalanced metal weight to make vibrations. An electronic unit controls when it runs. The system shakes off dust twice daily, at noon and at 3am, for about one minute each time. It can take power from the panel or a small independent battery and it uses an antistatic nano-coating.
Field trials showed lower losses with the new systems. The team is expanding production and has supplied another residential community in Giza governorate.
Difficult words
- develop — to create or improve something.developed
- system — a group of parts working together.
- solar — related to the sun or sunlight.solar panels
- panel — a flat piece used for something like solar energy.panels
- clean — to remove dirt or dust.cleaning
- dust — small, dry particles that settle on surfaces.
- money — currency used for buying things.
- vibration — a rapid back-and-forth movement.vibrations
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Why is it important to keep solar panels clean?
- How do you think this technology will affect energy costs?
- What other inventions could benefit from a self-cleaning system?
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