Japanese Firm Designing Futuristic Space Mega-Projects

by Nancy Atkinson on June 9, 2010

The Luna Ring, a belt of solar collecting panels along the Moon's equator. Credit: Shimizu

Space based solar power? How about a Moon-based solar collector that would beam energy back to Earth. This is just one idea proposed by a 200-year-old Japanese construction company, Shimizu that prides itself in forward-thinking technology and structure development. For this “Luna Ring,” an array of solar cells would extend like a belt along the entire 11,000 km lunar equator, and laser power transmission facilities would beam a high-energy-density laser towards receiving stations on Earth.

See more on the Luna Ring, plus plans for orbiting hotels, Moon bases, mega-pyramid cities, and more, below.

Energy gather on the Moon would be beamed back to Earth. Credit: Shimizu.

For this structure to be successful, teams of astronauts would have to support robotic surface operation on site. So, they would need a lunar base. Shimizu has that design in mind, too.

A proposed lunar base made of hexagonal structures. Credit: Shimizu

Lunar bases could be constructed using concrete made from lunar regolith. Using a hexagonal shape would allow for multi-directional future extension of the structure. Unmanned construction systems will be a critical matter in the severe lunar environment. The concept of self-assembling structures using membranes and air-inflation systems could realize light-weight structures and reduce transportation costs. Shimizu is also developing construction robot technologies that could be applied to constructing a lunar base, minimizing the hazards of manned activities.

An interior view of a potential lunar base. Credit: Shimizu

For long-term manned mission, the interior of base should be designed considering 1/6 G gravity environment.

The Shimizu Corporation says they have been accumulating technological skills over 200 years and would welcome the challenge of applying them to the new frontier of the moon, while continuing R&D on structures, materials, construction systems, and design of lunar bases.

A space elevator hotel, 240 km above the Earth. Credit: Shimizu

Shimizu has this concept for a space hotel, which includes a space elevator, approximately 240 km long, for “easy” access from Earth (building a space elevator will not be easy), but visiting spacecraft could dock as well. This large complex structure would be composed of several modules, such as a lobby, restaurants, and an area for recreation.

he Mega-City Pyramid stands 2,000 meters (1.25 miles) high. Credit: Shimizu

Shimizu is also looking at how they could build incredible structures on Earth that would house people and buildings on the oceans. The Mega-City Pyramid is a self-contained city for one million people. The basic structure—an assembly of regular octahedral units composed of shafts made from lightweight materials such as carbon fiber would be a project of unprecedented scale and proportion.

This video provides a look at some of the potential problems and hurdles to overcome for this type of structure:

Floating environmentally green islands with cities in the air. Credit: Shimizu

This “green” floating village would be almost like a giant lily pad floating on the water. Shimizu wants to create these cities that would act just like a lily, absorbing CO2 like a plant, as well as using other environmental technologies to achieve a carbon negative system. Solar power and resources from the ocean, as well as converting waste into energy would be used to give the floating city 100% self-sufficiency.

Visit the Shimizu website for more information about the company, and see their “dream” section for more information about these futuristic mega-projects.

Source: Shimizu, via Pink Tentacle


  • Lawrence B. Crowell

    Solar power satellites are not complete bunk. The problem is mass. They clearly could not be fabricated with silicon wafers. There are interesting developments with graphene, which is a monoatomic two dimensional layer of carbon. Two layers of these which are P and N doped could serve as a solar cell, and a lamination of these layers could serve as solar PV cells. In my estimate I assumed 1 Kg per meter squared. With this sort of system that might be reduced to 1gram per square meter. Now the solar panel would be a sort of kite tethered to a mass with station keeping ion engines at some distance away. The PV kite plus mass would be gravity gradient stabilized and could have a mass of a few metric tons. If this sort of system could be developed then solar power satellites would be “cooking with gas,” so should we say the sun.

    The advantage to solar power satellites is there is no atmospheric attenuation, no weather and the cells can be steered so they point to the sun with normal incidence all the time.

    @ Duncan Ivry In recent times there has been an uptake in wars. The US is involved with two of them, and one of them was over oil — or to secure oil profits as Dick Cheney, Haliburton and the oil companies made out like bandits in the mid-late 2000’s. The Republicans are chomping at the bit to start another with Iran. Palin got a solid round of applause for suggesting such.

    LC

  • Olaf

    By 2050 the climate problem might already be back on its course. The guy that created the first synthetic life has now some very cool possibilities of 4th generation fuel cells that could convert CO2 into fuel.

    At first I thought he was not serious but apparently he might be very on track by the end of the year. He discovered cells that already can do this but needed to be improved 1000 times so they can re-engineer the cell and create synthetic life.

    I think one day maybe we convert lunar soil or regular-sand into solar sells by just letting the synthetic generated cells eat the sand/soil.

  • Lawrence B. Crowell

    I am continually amused by ideas of converting CO_2 to fuel, and related schemes. This is similar to the idea that water H_2O is a fuel. These simple chemicals are in the low energy form. You have to input energy into them to get them into a high energy form. A moment of reflection on thermodynamics should make this somewhat clear. Suppose you burn coal to convert CO_2 into fuel. You will have to burn more coal, thus producing more CO_2, than the fuel you get from converting a smaller amount of CO_2 into fuel. The whole idea is not thermodynamically possible.

    As for synthetic life converting SiO into silicon crystals, that is pretty wild speculation at this point. Silicon does not enter much into biology. Silicon does not readily exist in polymer form. Silicone, a polymer of Si and O, exists with the help of some creative chemical engineering.

    LC

  • http://home.comcast.net/~jacobsdale/AquaFarmIN.pps Aqua

    it’s good to dream…

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