The world’s first absolutely working “sand battery”, which might retailer inexperienced energy for months at a time, has been put in by Finnish researchers.
The builders mentioned this might remedy the issue of year-round provide, a serious problem for inexperienced vitality.
Utilizing low-grade sand, the machine is charged up with warmth constituted of low-cost electrical energy from photo voltaic or wind.
The sand shops the warmth at round 500C, which might then heat houses in winter when vitality is costlier.
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