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China Focus: China seems to be set to construct house solar energy station



BEIJING, June 21 (Xinhua) — China has made a milestone advance in its effort to construct a solar energy station in house to transform the daylight in outer house into {an electrical} provide to drive the satellites in orbits or transmit energy again to the Earth.

A analysis crew from Xidian University has wrapped up the world’s first full-chain, system-wide floor verification for house solar energy station this month, displaying a number of key know-hows for the futuristic mission often known as Zhuri or chasing the solar.

The Space Solar Power Station (SSPS), a hotspot know-how, is a space-based energy era system used to gather photo voltaic power earlier than changing it to electrical energy after which to microwaves. The daylight is brighter outdoors the ambiance and shines virtually all day.

Next, the power in microwaves is to be transmitted to and harvested by the receiving antenna both in house or on the Earth’s floor, which converts microwaves again to electrical energy.

The key applied sciences verified embrace high-efficiency light-concentrating and photoelectric conversion, microwave conversion, 55-meter microwave emission and waveform optimization, microwave beam pointing measurement and management, microwave reception and rectification, and sensible mechanical construction design.


On the south campus of the Xi’an-based college stands a 75-meter-high metal construction. It is Zhuri’s floor verification facility.

The crew led by Duan Baoyan, the 67-year-old antenna knowledgeable with Xidian University, is tasked with simulating the ability era and transmission on the bottom. The major tech problem is to attenuate the power loss throughout modifications in power of various kinds.

Firstly, the researchers labored to regulate the angles of the large gathering lens in gentle of the photo voltaic altitude. At the middle of the lens are photo voltaic cell arrays linked to transmitting antennas. They examined these antennas that ship microwaves remotely to receiving ones.

The experiments had been each investigative and heavy labor work. To carry a 200-kilogram antenna, Duan needed to recruit faculty college students as momentary porters.

“You have to try again and again on the scene,” mentioned Duan. “Computer simulation does not work.”

More than 100 researchers and college students took half within the mission. Thanks to their arduous work, the verification efficiently handed examinations on June 5, about three years sooner than anticipated.


American scientist and aerospace engineer Peter Edward Glaser conceived the concept of utilizing satellites to beam photo voltaic power from house right down to the Earth in 1968.

John C. Mankins, a former NASA physicist, put ahead in 2012 an method referred to as SPS-ALPHA (Solar Power Satellite by way of Arbitrarily Large Phased Array). In 2015, Northrop Grumman Corporation within the United States sponsored a 17.5 million U.S. dollar analysis over three years for the event of the Space Solar Power Initiative (SSPI).

Duan proposed in late 2013 to kick off China’s personal initiative after which his crew put ahead China’s tech method OMEGA.

“Compared with ALPHA, OMEGA’s power-generating efficiency increased by about 24 percent, and it is easily controlled and has a better heat dissipation,” mentioned Duan.

Japan has included the house solar energy tech into its nationwide house improvement plan. Its scientists examined 55-meter distant microwave transmission in 2015, displaying its technical benefit in wi-fi power transmission.

However, Japan’s experiment will not be full-chain because it lacks the take a look at of light-to-electricity conversion, mentioned Duan.


Also, engineers from the China Academy of Space Technology, the nation’s state-owned spacecraft maker, revealed earlier this month in a examine revealed within the journal China Space Science and Technology a blueprint to advertise this path-breaking know-how.

An area excessive voltage switch and wi-fi energy transmission experiment is projected to be carried out in low Earth orbit in 2028, in response to its plan.

The satellite tv for pc might be able to producing 10 kilowatts and carry 1 / 4 of a photo voltaic cell array, a microwave transmitting antenna, a low-power laser transmission payload, and a transmitting array of some meters, with a purpose to take a look at energy transmission throughout distances of 400 kilometers from orbit.

By 2030, they plan to broaden the photo voltaic array to generate over 100 kilowatts and take a look at medium energy laser transmission throughout distances of 36,000 kilometers.

By 2035, the microwave transmitting antenna is anticipated to be enlarged to about 100 meters plus energy era of 10 megawatts. The objective in 2050 is to construct a commercially operated photo voltaic plant that generates electrical energy of two gigawatts with an round one-kilometer antenna and sophisticated photo voltaic cell array to be assembled in house.

“Space-to-Earth transmission is our final goal and it demands work of multiple years,” mentioned Duan. “But we can meet some near-term targets.”

Duan mentioned the photo voltaic power in house can firstly be used to cost medium-to-small satellites. “Now, they have to be launched with huge payloads of solar panels and the panels are unable to harvest power in shadowed regions when orbiting behind the Earth.”

In the close to future, these satellites are anticipated to be geared up with foldable receiving antennas whereas eliminating these photo voltaic panels, in response to Duan.