Benjamin Carr, Ph.D. 👨🏻‍💻🧬Nov 28
This #startup raised $8M to store #cleanenergy under the #sea
#SizableEnergy is reimagining pumped #hydro storage for the sea. Instead of using freshwater and #dams, company’s system uses saturated sea-salt brine – about 20% denser than #seawater – that moves between a floating reservoir and a deep-water reservoir. By harnessing gravity and #ocean depth, it can store and release gigawatt-scale power without the land use or environmental impact of onshore hydro projects.
https://electrek.co/2025/10/22/this-startup-raised-8m-to-store-clean-energy-under-the-sea/
This startup raised $8M to store clean energy under the sea

Ocean energy startup Sizable Energy raises $8M to scale its offshore gravity battery for long-duration power storage – here's how it works

Electrek
Show threadRamesh #NotGoingBackOct 23

⬆️ @GreenFire

>> #SizableEnergy is a clever name for the startup.

#ReflectOrbital, a #US company, is pitching giant mirrors in space to reflect sunlight at night.

Let's hope that the benefits from this one too are sizable and the costs insignificant.

via @sundogplanets
https://www.cbc.ca/news/science/reflect-orbital-space-mirror-9.6947427

Giant mirrors in space to reflect sunlight at night? No thank you, astronomers say | CBC News

A U.S. company is proposing to 'sell sunlight after dark,' saying it could help power solar farms and provide access to light in emergency situations. Astronomers are not only concerned about what this will do to the night sky, but also to wildlife.

CBC
Show threadRamesh #NotGoingBackOct 23

⬆️ @GreenFire

#SizableEnergy is a clever name for the startup.

Let's hope that the energy generated by gravity working on a density gradient to turn turbines is "sizable" enough to offset the energy required to pump sizable amounts of brine from a tank on the seabed to a floating tank on the sea surface.

Wouldn't turbines turn more efficiently in deep ocean cross currents?