Japan set to beam solar power from space to Earth

 Japan's OHISAMA Project Beams Solar Power from Space!

Japan's OHISAMA Project is an ambitious initiative aiming to revolutionize clean energy by harnessing solar power from space. "OHISAMA," meaning "sun" in Japanese, is spearheaded by Japan Space Systems and is slated for a demonstration launch in 2025.


Project Overview

  • Objective: To collect solar energy in space and wirelessly transmit it to Earth, providing a continuous and weather-independent power source. solar panel will gather sunlight in orbit, store energy in an onboard battery, and beam it back to Earth with microwaves.

    • To pick up the signal, the ground antennas, which cover a distance of 25 miles, must be placed three miles apart because of the blistering speed of 17,400 mph of the satellite.

  • Demonstration Satellite:

    • Weight: Approximately 400 pounds (180 kilograms).

    • Solar Panel: 22 square feet (2 square meters).

    • Orbit: Low Earth Orbit at about 250 miles (400 kilometers) altitude.

    • Energy Output: Around 1 kilowatt, enough to power small household appliances like a dishwasher or coffee maker .

  • Energy Transmission:

    • The satellite will convert collected solar energy into microwaves.

    • These microwaves will be beamed to a ground-based receiver array, known as a rectenna, located in Suwa, Japan .

    • Due to the satellite's high speed (~17,400 mph or 28,000 km/h), the ground antennas must be spread over a 25-mile (40-kilometer) area, with elements placed 3 miles (5 kilometers) apart to effectively capture the energy .

Technological Advancements

  • Beam-Pointing Accuracy: Japan has developed advanced control systems achieving an accuracy of 0.15 degrees in ground tests, ensuring precise energy transmission .

  • Wireless Power Transmission (WPT) Tests:

    • In 2015, successfully transmitted 1.8 kilowatts over 55 meters.

    • Later achieved 10 kilowatts over 500 meters.

    • Future plans include transmitting electricity from an aircraft flying at 7,000 meters to a ground receiver.

Future Implications

If successful, the OHISAMA Project could pave the way for large-scale space-based solar power stations capable of generating up to 1 gigawatt of power—enough to supply electricity to an entire city. Such technology offers a resilient energy source, particularly valuable during natural disasters when ground infrastructure may be compromised .

Japan's commitment to the OHISAMA Project underscores its dedication to innovative solutions for sustainable energy, potentially setting a precedent for global adoption of space-based solar power.




Comments

Post a Comment

Popular posts from this blog

Image
 Russia-Ukraine War (2022–2025) Invasion and Initial Resistance February 24, 2022 : Russia launches a full-scale invasion of Ukraine, attacking from the north, east, and south. President Vladimir Putin labels it a “special military operation” aimed at “demilitarizing” Ukraine.   March–April 2022 : Ukrainian forces repel Russian advances on Kyiv. Russia shifts focus to the eastern Donbas region. March 2022 : Initial peace talks occur in Istanbul but collapse without agreement. 2023: Escalation and Stalemate Russia intensifies offensives in the Donbas, capturing key territories. Ukraine receives increased Western military aid, including advanced weaponry. The conflict reaches a stalemate, with heavy casualties on both sides. 2024: Shifts in International Support Delays in U.S. aid and internal challenges hinder Ukraine's counteroffensives. Russia makes incremental gains in eastern Ukraine. Diplomatic efforts remain stagnant, with no significant peace negotiations. 2025: first di...
Read more

Israel: A Nation's Journey

                         Israel: A Nation's Journey Introduction it's hard to imagine that this nation was built upon centuries of suffering, turmoil, and bloodshed. In fact, Israel is the only country in the world founded for Jews—a people who have been historically scattered and persecuted. Before the 1940s, Jews were dispersed around the globe, especially in Europe, which had become their main home. But during World War II, Hitler's brutal regime targeted Jews in what became one of the darkest genocides in human history. The world largely remained silent as millions were killed. In such dire circumstances, the Jewish people began demanding a country of their own—a land where they could live freely and secure a future for their children. As Hitler's terror grew, Jews in Germany and other parts of Europe began migrating toward the Mediterranean, to a small region known as Palestine . Jews from Africa, Europe, an...
Read more