Sähköä leijuvista aurinkopalloista
Selittäkää mulle kielitaidottomalle tämä jutun idea muutamalla sanalla - en uskalla alkaa itse kääntämään sanakirjan kanssa, kun kuulostaa niin oudolta:
"Solar balloons to power remote areas?
* , Tuesday April 8 2008
By Ari Rabinovitch
HAIFA, Israel, April 8 (Reuters) - Giant solar energy balloons floating high in the air may be a cheap way to provide electricity to areas lacking the land and infrastructure needed for traditional power systems, researchers in Israel say.
"The idea is to take advantage of the height dimension. When you do that, you save a lot of land resources and can get to places otherwise hard to reach," said Pini Gurfil, the concept's developer.
The helium-filled balloons, covered with thin solar panels, hover as high as a few hundred metres in the air, and are connected via a wire cable to an inverter, which converts the electricity into a form households can use.
It will be about a year before the system is ready, Gurfil said. But initial research, both computerised and using a crude prototype, showed a balloon with a three metre (10 ft) diameter could provide about one kilowatt of energy, the same as 25 square metres (269 square feet) of traditional solar panels.
That's about enough energy for an average person to operate a washing machine and drier. While 25 square metres of traditional solar panels may cost about $10,000, the target cost of the balloon is less than $4,000, with most of the savings coming from the minimal structural support needed, Gurfil said.
"The balloons have no carbon footprint or negative impact on the environment," Gurfil said. "Helium is a naturally occurring gas and environment-friendly. The system saves land from being occupied as well as resources like glass and metal used in ground-based solar energy systems."