Mitsubishi, IHI to Join $21 Bln Space Solar Project

[amor de cosmos]

old visionary idea finally being seriously considered (sort of):

Mitsubishi, IHI to Join $21 Bln Space Solar Project (Update1)
By Shigeru Sato and Yuji Okada

Sept. 1 (Bloomberg) -- Mitsubishi Electric Corp. and IHI Corp. will join a 2 trillion yen ($21 billion) Japanese project intending to build a giant solar-power generator in space within three decades and beam electricity to earth.

A research group representing 16 companies, including Mitsubishi Heavy Industries Ltd., will spend four years developing technology to send electricity without cables in the form of microwaves, according to a statement on the trade ministry’s Web site today.

“It sounds like a science-fiction cartoon, but solar power generation in space may be a significant alternative energy source in the century ahead as fossil fuel disappears,” said Kensuke Kanekiyo, managing director of the Institute of Energy Economics, a government research body.

Japan is developing the technology for the 1-gigawatt solar station, fitted with four square kilometers of solar panels, and hopes to have it running in three decades, according to a 15- page background document prepared by the trade ministry in August. Being in space it will generate power from the sun regardless of weather conditions, unlike earth-based solar generators, according to the document. One gigawatt is enough to supply about 294,000 average Tokyo homes.

Takashi Imai, a spokesman for the Institute of Unmanned Space Experiment Free Flyer, which represents the 16 companies, confirmed the selection when reached by phone in Tokyo.

Mitsubishi Electric gained 0.1 percent to 693 yen at the morning break in Tokyo trading, while IHI fell 0.5 percent to 189 yen and Mitsubishi Heavy slipped 0.3 percent to 384 yen. The benchmark Topix index rose 0.3 percent.

Far, Far Away

Transporting panels to the solar station 36,000 kilometers above the earth’s surface will be prohibitively costly, so Japan has to figure out a way to slash expenses to make the solar station commercially viable, said Hiroshi Yoshida, Chief Executive Officer of Excalibur KK, a Tokyo-based space and defense-policy consulting company.

“These expenses need to be lowered to a hundredth of current estimates,” Yoshida said by phone from Tokyo.

The project to generate electricity in space and transmit it to earth may cost at least 2 trillion yen, said Koji Umehara, deputy director of space development and utilization at the science ministry. Launching a single rocket costs about 10 billion yen, he said.

“Humankind will some day need this technology, but it will take a long time before we use it,” Yoshida said.

The trade ministry and the Japan Aerospace Exploration Agency, which are leading the project, plan to launch a small satellite fitted with solar panels in 2015, and test beaming the electricity from space through the ionosphere, the outermost layer of the earth’s atmosphere, according to the trade ministry document. The government hopes to have the solar station fully operational in the 2030s, it said.

In the U.S., the National Aeronautics and Space Administration and the energy department have spent $80 million over three decades in sporadic efforts to study solar generation in space, according to a 2007 report by the U.S. National Security Space Office.

http://www.bloomberg.com/apps/news?p...d=aJ529lsdk9HI

found in Inhabitat:

Japan Plans $21 Billion Solar Space Post to Power 294,000 Homes
by Ariel Schwartz

The concept of space-based solar power was introduced way back in 1968, but it’s only recently that the world has latched on to the idea. Japan is definitely getting in on the action with its latest spacey plan - a $21 billion solar-powered generator in the heavens to produce one gigawatt of energy, or enough to power 294,000 homes. The Japanese government announced the plan back in June, but there has been an important new development - Mitsubishi Electric Corp. and industrial design company IHI Corp. are now teaming up in the race to develop new technology within four years that can beam electricity back to Earth without the use of cables.

Mitsubishi and IHI are joining a research group containing 14 other countries to tackle the daunting task of getting Japan’s four square kilometer solar space station up and running in the next three decades. By 2015, the Japanese government hopes to test a small satellite decked out with solar panels that beams power through space and back to Earth.

There are still a number of hurdles to work through before space-based solar power becomes a reality though. Transportation of the solar panels into space is too expensive at the moment to be commercially viable, so Japan has to figure out a way to lower costs. Even if costs are lowered, solar stations will have to worry about damage from micrometeoroids and other flying objects. Still, space-based solar operates perfectly under all weather conditions, unlike Earth-based panels that are at the mercy of the clouds.

Japan isn’t the only country in the race for space power. Solaren and California’s Pacific Gas and Electric utility are working together on a project to deliver 200 megawatts of power from space over a 15-year period that begins in 2015.

http://www.inhabitat.com/2009/09/01/...-294000-homes/

[amor de cosmos]

there's a home page here:
http://www.usef.or.jp/english/f3_pro...s/f3_ssps.html