The large size of the transmitting and receiving antennas means that the minimum practical power level for an SPS will necessarily be high; small SPS systems will be possible, but uneconomic.
Space solar power systems appear to possess many significant environmental advantages when compared to alternative approaches. Experiments with deliberate microwave irradiation at reasonable levels have failed to show negative effects even over multiple generations. Microwave power transmission[ edit ] William C.
Rectennas would likely be several kilometers across. The microwave beam intensity at ground level in the center of the beam would be designed and physically built into the system; simply, the transmitter would be too far away and too small to be able to increase the intensity to unsafe levels, even in principle.
Having a relatively cheap per pound source of raw materials from space would lessen the concern for low mass designs and result in a different sort of SPS being built.
Space solar power may well emerge as a serious candidate among the options for meeting the energy demands of the 21st century. Renewable energy is a compelling approach, both philosophically and in engineering terms.
In space applications[ edit ] A laser SBSP could also power a base or vehicles on the surface of the Moon or Mars, saving on mass costs to land the power source. Formulate a preliminary plan of action for the U. The long-term effects of beaming power through the ionosphere in the form of microwaves has yet to be studied, but nothing has been suggested which might lead to any significant effect.
Solar dynamic uses mirrors to concentrate light on a boiler. Before this paper there was concern that the NOx produced by reentry would destroy too much ozone. A NASA design study  evaluated a 10, ton mining vehicle to be assembled in orbit that would return aton asteroid fragment to geostationary orbit.
Platforms would carry billions of silicon solar cells that would transform sunlight directly into electrical energy transmitted to Earth as microwaves through antennas. It includes an introduction to SPS, current research and future prospects.
The proposal was followed by a vision video The Office of Technology Assessment concluded that "Too little is currently known about the technical, economic, and environmental aspects of SPS to make a sound decision whether to proceed with its development and deployment. Zhang Yulin, deputy chief of the [PLA] armament development department of the Central Military Commission, suggested that China would next begin to exploit Earth-Moon space for industrial development.
Two basic methods of conversion have been studied:.
DuringBoeing designed a solar power satellite system that could supply most of the United States at the time with electricity. Satellites would be space platforms the size of a small city deployed some 22, miles (35, kilometers) above the equator in geosynchronous Earth orbit (GEO).
SPS-ALPHA: The First Practical Solar Power Satellite via Arbitrarily Large PHased Array.
These panels convert solar power into either a microwave or a laser, and beam uninterrupted power down to Earth. On Earth, power-receiving stations collect the beam and add it to the electric grid.
The two most commonly discussed designs for SBSP are a large, deeper space microwave transmitting satellite and a smaller, nearer laser transmitting. These panels convert solar power into either a microwave or a laser, and beam uninterrupted power down to Earth.
On Earth, power-receiving stations collect the beam and add it to the electric grid. The two most commonly discussed designs for SBSP are a large, deeper space microwave transmitting satellite and a smaller, nearer laser transmitting satellite.
Its about Solar Power Satellite. We wiil meet soon as world is running out of fossil fuels. The Solar Power Satellite Concept: The Past Decade and the Next Decade, JSC, July Some Questions and Answers About the Satellite Power System (SPS), DOE/ER/1, U.S.
Department of Energy, Office of Energy Research, Satellite Power System Project Office, JanuarySolar power satellite