FINLAND HAS installed the world’s first sand battery that can store heat from renewable energy sources for months. The Finnish developers told Down To Earth that the battery, made of sand collected from construction sites, can solve the problem of round-the year energy supply, a known limitation of renewable energy sources that can be harnessed intermittently. This is a major breakthrough, as heat alone accounts for half of the world’s energy use, followed by transport (30 per cent) and electricity (20 per cent), as per intergovernmental organisation International Energy Agency (iea). Currently, 80 per cent of the world’s energy comes from dirty fossil fuels.
The battery, a massive steel silo, 7 m tall and 4 m wide with 100 tonnes of sand, was installed in Finland’s Kankaanpää town in June 2022. It is connected to the town's centralised heating network that keeps buildings and public water systems warm. Owing to the cold temperature, all municipalities and cities in Finland have centralised heating networks, and 70 percent of them use renewable sources, as per non-profit The Finnish District Heating and Cooling Association.
Bu hikaye Down To Earth dergisinin February 16, 2023 sayısından alınmıştır.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber ? Giriş Yap
Bu hikaye Down To Earth dergisinin February 16, 2023 sayısından alınmıştır.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber? Giriş Yap
On shaky ground
Despite reporting net gains in green cover, the latest forest survey shows degradation of natural forests, particularly in ecologically sensitive hotspots
Burden of proof
The government's drive for e-KYC verification to ensure rightful targeting of beneficiaries has proved exclusionary for many
Rupee slide impacts agricultural trade
THE UNION Cabinet on January 1, 2025, approved the extension of a subsidy package of ₹3,500 per tonne on di-ammonium phosphate (DAP) for companies.
THE 500 GW SWITCH OVER
Coal is the king of energy at present. India needs to dislodge it with clean energy for an equitable green transition
MANIFESTING 500 GW
Ensure that renewable energy is available round the clock.Establish a viable market and reward those who take lead
Lifting a curse
How Gangabai Rajput helped her water-scarce village in Madhya Pradesh let go of superstition and revive an ancient waterbody
HOLD THEM SACRED
The Supreme Court has recommended that the Union government create a comprehensive policy for the governance and management of sacred groves across the country
REPORT CARD 2024
Coal is still the king in terms of electricity generation. But new renewables, mainly solar power, have shown an impressive growth
'India a laboratory for seismologists'
India is no stranger to earthquakes. In recent memory, Latur and Bhuj districts in Maharashtra and Gujarat witnessed devastating tremors in 2003 and 2001 respectively. Such quakes leave clues that can aid preparations for future events, say seismologists KUSALA RAJENDRAN, professor, Indian Institute of Science, and CP RAJENDRAN, adjunct professor, National Institute of Advanced Studies. The Rumbling Earth-The Story of Indian Earthquakes, captures their work on historical as well as recent quakes. In an interview with ROHINI KRISHNAMURTHY, they discuss the science of earthquakes, why the Himalayas are due for a huge event and why prediction remains a challenge. Excerpts:
Capturing Siang
As India pushes for a mega-dam on the Siang river to counter China's upstream projects, the Adi tribal community of Arunachal Pradesh fears losing ancestral land