Name: 我們怕電費高不敢開暖氣，芬蘭卻靠「沙子電池」過暖冬？！ (Freezing cold? This town in Finland is keeping warm with sand • FRANCE 24 English)
Uploaded: 2026-02-08T21:01:10.000Z
Duration: 2 min 12 s

the winters are cold and dark, with an average temperature of -10 degrees Celsius.

冬天寒冷又漫長，平均氣溫是零下 10 度。

And yet, inside this school, it's T-shirts and stockinged feet.

然而在這所學校裡，大家卻穿著 T 恤、只穿襪子走來走去。

You don't need any sleeves, or shoes at all.

你完全不需要穿長袖，甚至不用穿鞋。

It's very nice to be inside, and not feel cold at all.

待在室內非常舒服，一點也不覺得冷。

The school, homes and everything in this 5,000 resident town belongs to a heat network.

這所學校、住宅，以及這座約 5,000 人小鎮的一切，都屬於同一個供熱網絡。

Inside 100 tons of fine rubble from nearby building sites, chosen for its particular properties.

裡面裝有 100 噸來自附近建築工地的細碎石料，

It's called soapstone, which can hold heat really well.

這種材料叫做皂石，因為它特別擅長儲存熱能。

You don't need that type of sand that's in a shortage.

不需要使用目前短缺的那種沙子。

The battery is powered by electricity produced by wind turbines and solar panels, heating the sand to 500 degrees.

這座電池由風力與太陽能發電供電，將沙子加熱至 500 度。

The sand then heats water, which is sent round the town's radiators.

加熱後的沙子再用來加熱水，將熱水送進整個小鎮的暖氣系統。

And inside the silo, the sand stays hot for as long as a week,

而在筒倉內，沙子能夠保持高溫長達一週，

solving the problem of how to store intermittently produced energy from renewable sources.

解決了再生能源發電間歇性、難以儲存的問題。

It offers a method to store large amounts of energy.

它提供了一種能儲存大量能源的方法。

So we are constantly discharging and charging the system, so that we can always provide a steady stream of heat.

因此系統會不斷進行充放熱，確保能穩定供應熱能。

This new system replaces the centralized burning of wood, sourced from the vast Finnish forests.

這套新系統取代了過去集中焚燒木材的供暖方式，木材來自芬蘭廣大的森林。

The mayor anticipates the change will cut the town's carbon emissions by 70% and make them more self-sufficient.

市長預期，這項改變能讓小鎮的碳排放量減少 70%，也更具能源自主性。

Heated water from the sand battery comes here.

從沙子電池加熱的熱水會流到這裡。

It circulates into the building and the used water is going back to the sand battery.

熱水在建築內循環後，使用過的水再回流到沙子電池。

It will be recharged there and coming back heated.

在那裡重新加熱後，再次送回系統。

So if the electricity is cut off, the heat is still there.

所以即使停電，熱能仍然存在。

The radiator thermostat is set to 22 degrees all day long.

這讓我每個月省下將近 300 歐元。

Cheap, renewable and effective, this technology could be scalable to much larger cities.

便宜、再生、有效，這項技術有機會擴展到更大的城市。