{"id":886,"date":"2025-11-27T01:32:39","date_gmt":"2025-11-27T01:32:39","guid":{"rendered":"https:\/\/en.esplaza.com.cn\/?p=886"},"modified":"2025-11-27T01:32:39","modified_gmt":"2025-11-27T01:32:39","slug":"250mwh-sand-battery-to-start-construction-in-finland-for-both-heating-and-ancillary-services","status":"publish","type":"post","link":"https:\/\/en.esplaza.com.cn\/index.php\/2025\/11\/27\/250mwh-sand-battery-to-start-construction-in-finland-for-both-heating-and-ancillary-services\/","title":{"rendered":"250MWh \u2018Sand Battery\u2019 to start construction in Finland, for both heating and ancillary services"},"content":{"rendered":"\n
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Technology provider Polar Night Energy and utility Lahti Energia have partnered for a large-scale project using Polar\u2019s \u2018Sand Battery\u2019 technology for the latter\u2019s district heating network in V\u00e4\u00e4ksy, Finland.<\/p>\n\n\n\n

The project will have a heating power of 2MW and a thermal energy storage (TES) capacity of 250MW, making it a 125-hour system and the largest sand-based TES project once complete.<\/p>\n\n\n\n

It will supply heat to Lahti Energia\u2019s V\u00e4\u00e4ksy district heating network but is also large enough to participate in Fingrid\u2019s reserve and grid balancing markets.<\/p>\n\n\n\n

Polar Night Energy\u2019s technology works by heating a sand or a similar solid material using electricity, retaining that heat and then discharging that for industrial or heating use.<\/p>\n\n\n\n

The project will cut fossil-based emissions in the V\u00e4\u00e4ksy district heating network by around 60% each year, by reducing natural gas use bu 80% and also decreasing wood chip consumption.<\/p>\n\n\n\n

It follows Polar Night Energy completing and putting a 1MW\/100MWh Sand Battery TES project into commercial operations this summer<\/a>, for another utility Loviisan L\u00e4mp\u00f6. That project uses soapstone as its storage medium, a byproduct of ceramics production.<\/p>\n\n\n\n

This latest project will use locally available natural sand, held in a container 14m high and 15m wide. Lahti Energia received a grant for the project from state body Business Finland.<\/p>\n\n\n\n

Polar Night Energy will act as the main contractor for the construction project, with on-site work beginning in early 2026, and the Sand Battery will be completed in summer 2027.<\/p>\n\n\n\n

\u201cWe want to offer our customers affordable district heating and make use of renewable energy in our heat production. The scale of this Sand Battery also enables us to participate in Fingrid\u2019s reserve and grid balancing markets. As the share of weather-dependent energy grows in the grid, the Sand Battery will contribute to balancing electricity supply and demand\u201d, says Jouni Haikarainen, CEO of Lahti Energia.<\/p>\n","protected":false},"excerpt":{"rendered":"

Technology provider Polar Night Energy and utility Lahti Energia have partnered for a large-scale project…<\/p>\n","protected":false},"author":2,"featured_media":887,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-886","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-project"],"_links":{"self":[{"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=886"}],"version-history":[{"count":1,"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/886\/revisions"}],"predecessor-version":[{"id":888,"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/886\/revisions\/888"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/media\/887"}],"wp:attachment":[{"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=886"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=886"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/en.esplaza.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}