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Alphabet reportedly working on renewable energy storage system

Alphabet reportedly working on renewable energy storage system

PanARMENIAN.Net - Alphabet Inc.'s secretive X skunk works has another idea that could save the world. This one, code named Malta, involves vats of salt and antifreeze, Bloomberg reports.

The research lab, which hatched Google's driverless car almost a decade ago, is developing a system for storing renewable energy that would otherwise be wasted, Bloomberg says. It can be located almost anywhere, has the potential to last longer than lithium-ion batteries and compete on price with new hydroelectric plants and other existing clean energy storage methods, according to X executives and researchers.

The previously undisclosed initiative is part of a handful of energy projects at X, which has a mixed record with audacious "moonshots" like Google Glass and drone delivery. Venture capitalists, and increasingly governments, have cut funding and support for technology and businesses built around alternatives to fossil fuels. X's clean-energy projects have yet to become hits like its driverless cars, but the lab isn't giving up.

"If the moonshot factory gives up on a big, important problem like climate change, then maybe it will never get solved," said Obi Felten, a director at X. "If we do start solving it, there are trillions and trillions of dollars in market opportunity."

She runs The Foundry, where a Malta team of fewer than 10 researchers is testing a stripped-down prototype. This is the part of X that tries to turn experiments in science labs into full-blown projects with emerging business models, such as its Loon internet-beaming high-altitude balloons. Malta is not yet an official X project, but it has been "de-risked" enough that the team is now looking for partners to build, operate and connect a commercial-sized prototype to the grid, Felten said. That means Alphabet may team up or compete with industrial powerhouses like Siemens AG, ABB Ltd. and General Electric Co.

X is stepping into a market that could see about $40 billion in investment by 2024, according Bloomberg New Energy Finance. Roughly 790 megawatts of energy will be stored this year and overall capacity is expected to hit 45 gigawatts in seven years, BNEF estimates. Existing electrical grids struggle with renewable energy, a vexing problem that's driving demand for new storage methods. Solar panels and wind farms churn out energy around midday and at night when demand lulls. This forces utilities to discard it in favor of more predictable oil and coal plants and more controllable natural gas "peaker" plants.

In renderings, viewed by Bloomberg News, the system looks like a miniature power plant with four cylindrical tanks connected via pipes to a heat pump. X says it can vary in size from roughly the dimensions of a large garage to a full-scale traditional power plant, providing energy on demand to huge industrial facilities, data centers or storage for small wind farms and solar installations.

The system mixes an established technique with newly designed components. "Think of this, at a very simple level, as a fridge and a jet," said Julian Green, the product manager for Malta.

Two tanks are filled with salt, and two are filled with antifreeze or a hydrocarbon liquid. The system takes in energy in the form of electricity and turns it into separate streams of hot and cold air. The hot air heats up the salt, while the cold air cools the antifreeze, a bit like a refrigerator. The jet engine part: Flip a switch and the process reverses. Hot and cold air rush toward each other, creating powerful gusts that spin a turbine and spit out electricity when the grid needs it. Salt maintains its temperature well, so the system can store energy for many hours, and even days, depending on how much you insulate the tanks.

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