Science behind sand batteries

Dear EarthTalk: Could plain-ol’ beach sand be the next frontier in renewable energy?

— Paul C., Baltimore, Maryland

In our ongoing quest for sustainable energy solutions, innovative technologies are necessary to complement renewable sources like solar and wind power. One such potential breakthrough revolves around an unexpected but abundant resource: beach sand.

Sand batteries represent an emerging approach to energy storage, particularly effective in harnessing and retaining energy from intermittent sources like solar and wind. The physical properties of sand, such as its ability to store heat at high temperatures, make it an excellent medium for energy retention. This capacity is being leveraged by innovative technologies to create a more stable and reliable energy supply, as sand can efficiently accumulate and release heat as required.

The science behind sand batteries involves heating sand to high temperatures using surplus energy generated from renewable sources. This stored heat can then be converted back into energy when needed. This system capitalizes on the thermal properties of sand to create a natural battery that can offer both heating solutions and electricity generation. As National Renewable Energy Laboratory’s (NREL) Patrick Davenport notes, “Sand and concrete silos with refractory insulation are very inexpensive materials that can lead to low-cost energy storage.” A few key players currently pioneering this technology include Polar Night Energy in Finland, which has implemented a sand battery for residential and commercial heating, and EnergyNest in Norway, which specializes in thermal energy storage using similar principles.

Using sand for energy storage offers multiple benefits: it is abundant, low-cost, eco-friendly, and can store heat for long periods. This makes sand an attractive option for enhancing the stability of renewable energy systems, and providing a reliable energy supply even during times of low sunlight or wind.

Sand battery technology is currently being tested and used in various projects worldwide, not only demonstrating the viability of sand as an energy storage solution but highlighting its potential scalability and integration into existing energy infrastructures.

Developing and deploying sand battery technology on a large scale requires significant research and development efforts.

EarthTalk® is produced by Roddy Scheer & Doug Moss for the 501(c)3 nonprofit EarthTalk.

The views expressed here are not necessarily those of The Lakeville Journal and The Journal does not support or oppose candidates for public office.

Latest News

Classifieds - February 26, 2026

Classifieds - February 26, 2026

Help Wanted

PART-TIME CARE-GIVER NEEDED: possibly LIVE-IN. Bright private STUDIO on 10 acres. Queen Bed, En-Suite Bathroom, Kitchenette & Garage. SHARON 407-620-7777.

The Salisbury Association’s Land Trust seeks part-time Land Steward: Responsibilities include monitoring easements and preserves, filing monitoring reports, documenting and reporting violations or encroachments, and recruiting and supervising volunteer monitors. The Steward will also execute preserve and trail stewardship according to Management Plans and manage contractor activity. Up to 10 hours per week, compensation commensurate with experience. Further details and requirements are available on request. To apply: Send cover letter, resume, and references to info@salisburyassociation.org. The Salisbury Association is an equal opportunity employer.

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

To save birds, plant for caterpillars

Fireweed attracts the fabulous hummingbird sphinx moth.

Photo provided by Wild Seed Project

You must figure that, as rough as the cold weather has been for us, it’s worse for wildlife. Here, by the banks of the Housatonic, flocks of dark-eyed juncos, song sparrows, tufted titmice and black-capped chickadees have taken up residence in the boxwood — presumably because of its proximity to the breakfast bar. I no longer have a bird feeder after bears destroyed two versions and simply throw chili-flavored birdseed onto the snow twice a day. The tiny creatures from the boxwood are joined by blue jays, cardinals and a solitary flicker.

These birds will soon enough be nesting, and their babies will require a nonstop diet of caterpillars. This source of soft-bodied protein makes up more than 90 percent of native bird chicks’ diets, with each clutch consuming between 6,000 and 9,000 caterpillars before they fledge. That means we need a lot of caterpillars if we want our bird population to survive.

Keep ReadingShow less
Stephanie Haboush Plunkett and the home for American illustration

Stephanie Haboush Plunkett

L. Tomaino
"The field of illustration is very close to my heart"
— Stephanie Plunkett

For more than three decades, Stephanie Haboush Plunkett has worked to elevate illustration as a serious art form. As chief curator and Rockwell Center director at the Norman Rockwell Museum in Stockbridge, Massachusetts, she has helped bring national and international attention to an art form long dismissed as merely commercial.

Her commitment to illustration is deeply personal. Plunkett grew up watching her father, Joseph Haboush, an illustrator and graphic designer, work late into the night in his home studio creating art and hand-lettered logos for package designs, toys and licensed-character products for the Walt Disney Co. and other clients.

Keep ReadingShow less
Free film screening and talk on end-of-life care
‘Come See Me in the Good Light’ is nominated for best documentary at this year’s Academy Awards.
Provided

Craig Davis, co-founder and board chair of East Mountain House, an end-of-life care facility in Lakeville, will sponsor a March 5 screening of the documentary “Come See Me in the Good Light” at The Moviehouse in Millerton, followed by a discussion with attendees.

The film, which is nominated for best documentary at this year’s Academy Awards, follows the poet Andrea Gibson and their partner Megan Falley as they are suddenly and unimaginably forced to navigate a terminal illness. The free screening invites audiences to gather not just for a film but for reflection on mortality, healing, connection and the ways communities support one another through difficult life transitions.

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.