World’s largest cavern thermal energy storage to warm city year-round

    WORLD  13 April 2024 - 02:04

    Interesting Engineering carries an article about the caverns which will store renewable energy in the form of heat that can be supplied to the existing district heating system, Caliber.Az reprints the article.

    Vaanta Energy, a company owned by the cities of Helsinki and Vaanta in Finland, has ambitious plans to establish the world’s largest cavern-based thermal energy storage system.

    Consisting of three underground caverns, the facility is proposed to have an energy storage capacity of 90 gigawatt hours (GWh) and meet the heating needs of a medium-sized city for up to a year. 

    With renewable energy facilities becoming the focus of future energy investments, wind and solar infrastructure is being built worldwide. However, the issues of intermittency of this energy solution present another problem before us, which is energy storage. 

    Battery-based energy storage, as offered by companies like Tesla, can only serve small-scale facilities. However, industrial-scale storage options are needed. Interesting Engineering has previously reported how companies use sand as an energy storage option, and now Vaanta wants to demonstrate how a cavern can store thermal energy for long periods. 

    District heating in Finland

    Finland is the largest producer of district heating in the European Union. In 2023, the country produced 37.3 terawatt-hours of heating. Over half of this heating was generated using renewable energy; another 14 percent was recovered from waste heat.

    In Vaanta, most homes are connected to the municipality-run underground heating system, a 373-mile (600 km) long network. Hot water is pumped through the system, which is connected to heat exchangers installed in buildings. After heat transfer, the cooler water is returned to the production plant to be reheated. 

    A waste-to-energy plant and a wood-fuelled power plant currently supply energy to the district heating system, but Vaanta Energy plans to introduce renewable energy to the mix as early as 2028. 

    Varanto – Cavern thermal energy

    The Varanto project design comprises three caverns, each measuring over 900 feet (300 m) long, 131 feet (40 m) high, and 65 feet (20 m) wide. Together, the three caverns will have a total volume of 38.85 million cubic feet (1.1 million cubic metres), making it the largest such facility in the world. 

    The structures will be built at a depth of 330 feet (100 m) underground. When renewable energy is produced in excess, two 60 MW water boilers will fill the caverns with hot water. The facility will maintain a high pressure, which will allow water to be heated to 284 degrees Fahrenheit (140 degrees Celsius) without the water boiling over or being converted into steam. 

    A smart control system will also allow waste industrial heat to be used to heat the water when available. “Our heat-producing system will work like a hybrid car: alternating between electricity and other forms of production, depending on what is most advantageous and efficient at the time,” explained Jukka Toivonen, CEO of Vaanta Energy in the press release. 

    The facility’s total thermal energy capacity is 90 GWh, the equivalent of energy stored in 1.2 million electric vehicles. When fully charged, it can meet the heating needs for the whole year, a press release said. 

    Details of the system’s heating cost have not been revealed yet. However, the project, whose construction is expected to start this summer, will cost an estimated 200 million euros ($217 million). 

    Caliber.Az

    Subscribe to our Telegram channel


Read also

US: 30 years for man who attacked Nancy Pelosi's husband

18 May 2024 - 13:53

Gunmen kill three Spanish tourists in Afghanistan's central Bamyan province

18 May 2024 - 12:00

US says drone strikes on Russia hurt fuel supplies but not power

18 May 2024 - 13:28

Israeli strike on West Bank's Jenin kills alleged militant leader, injures 8

18 May 2024 - 11:48

Axios: US, Iran held indirect talks this week on avoiding more attacks

18 May 2024 - 10:48

North Korean president guides tactical missile test with “autonomous navigation”

18 May 2024 - 12:38
ADVERTS
Video
Latest news

    US: 30 years for man who attacked Nancy Pelosi's husband

    18 May 2024 - 13:53

    Azerbaijani gas supplies to Europe via TAP surpass 35 billion cubic meters

    18 May 2024 - 13:40

    US says drone strikes on Russia hurt fuel supplies but not power

    18 May 2024 - 13:28

    COP29 at crossroads in Azerbaijan with focus on climate finance

    Article by The Guardian

    18 May 2024 - 13:17

    Azerbaijan seize Armenian weapons, ammunition in Khankandi, surrounding areas

    PHOTO/VIDEO

    18 May 2024 - 13:03

    Azerbaijani Army achieves substantial mine clearance in liberated territories

    PHOTO/VIDEO

    18 May 2024 - 12:50

    North Korean president guides tactical missile test with “autonomous navigation”

    18 May 2024 - 12:38

    Armenia, Netherlands mull bilateral relations, Baku-Yerevan peace treaty

    18 May 2024 - 12:26

    Azerbaijan sets priorities ahead of COP29

    "Green" financing, ESG implementation

    18 May 2024 - 12:13

    Pashinyan visits border village to persuade discontented residents, claims revanchist archbishop

    18 May 2024 - 12:03

    Gunmen kill three Spanish tourists in Afghanistan's central Bamyan province

    18 May 2024 - 12:00

    Israeli strike on West Bank's Jenin kills alleged militant leader, injures 8

    18 May 2024 - 11:48

    Turkish transport minister outlines timeline for Zangezur corridor launch

    18 May 2024 - 11:38

    Senegalese prime minister criticises French military bases on territory

    18 May 2024 - 11:37

    Azerbaijani oil price nears $85

    18 May 2024 - 11:24

    IAEA chief Rafael Grossi to discuss Zaporizhzhya NPP in Russia visit

    18 May 2024 - 11:12

    Azerbaijani deputy defence ministers emphasize combat readiness, training reforms

    Meeting with reservists

    18 May 2024 - 11:00

    Axios: US, Iran held indirect talks this week on avoiding more attacks

    18 May 2024 - 10:48

    Azerbaijan, Cuba focus on strengthening ties, cooperation ahead of COP29

    18 May 2024 - 10:36

    European leaders oppose Kosovo's bid for Council of Europe membership

    18 May 2024 - 10:24

    India awaits clear proposals from Armenia on Chabahar Port use - Ambassador

    18 May 2024 - 10:12

    Georgia's president rejects amendments to foreign agents law

    18 May 2024 - 10:00

    Germany expresses readiness to aid peace talks between Baku and Yerevan

    18 May 2024 - 09:48

    Azerbaijan highlights post-conflict reconstruction at Council of Europe meeting

    18 May 2024 - 09:36

    European Union supports continuation of Armenia, Azerbaijan border delimitation

    18 May 2024 - 09:25

    Azerbaijan, US mull cooperation, regional peace

    18 May 2024 - 09:11

    Why Xi’s European tour was a quiet but effective victory over the US

    18 May 2024 - 09:00

    Ukraine's new long-range missiles leave Russians "nowhere to hide"

    PHOTO

    18 May 2024 - 07:10

    Asian refiners diversify away from Middle Eastern oil

    18 May 2024 - 05:08

    How Taiwan still hangs on to property in bits of China

    18 May 2024 - 03:06

    Right US-China policy prioritizes collaboration despite competition

    18 May 2024 - 01:04

    Saudi Arabia: Why Mohammed bin Salman failed Gaza

    17 May 2024 - 23:02

    Russia aims for enhanced transport connectivity in greater Eurasia

    17 May 2024 - 20:54

    Armenian premier rejects opposition's demand for resignation

    17 May 2024 - 20:36

    Online Azerbaijan project aims for nationwide broadband coverage with 35 Mbps by end of 2024

    17 May 2024 - 20:17

    Turkish army neutralizes 1,000 terrorists since January 2024 - ministry

    17 May 2024 - 19:59

    Belarus president concludes state visit to Azerbaijan

    17 May 2024 - 19:55

    Baku Int’l Sea Trade Port aims for carbon neutrality by 2035, says port head

    17 May 2024 - 19:43

    Kazakhstan set to launch new production at Baikonur Cosmodrome

    17 May 2024 - 19:24

    Türkiye in advanced talks with China's BYD, Chery for EV plants

    17 May 2024 - 19:12

All news