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New Sand Battery

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A new way of storing renewable energy is providing clean heat through the long Nordic nights.

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It's a low-maintenance system, says Kivioja. The company uses cheap, low-quality sand that's been rejected by builders instead of high quality river-sand which is used in vast quantities for construction, leading to a global shortage.

"There's no wear and tear involved with the [heat exchange] pipes and the sand. The fan is the only moving part and it's easy to replace if necessary," says Kivioja.

Sand is a very effective medium for retaining heat over a long period, storing power for months at a time. And there are other benefits too. "The sand has a very long lifetime: it can heat up and cool off any number of times," says Kivioja. "It will get denser after a while so needs less space. At that point we can add more sand."
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Discussion Starter · #5 ·
I wonder if a water well used for lawn irrigation could be converted to geothermal?
 

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Discussion Starter · #8 ·
The output is "clean" heat, not electricity.
Yes. "the battery discharges about 200 kW of power through the heat-exchange pipes: that's enough to provide heating and hot water for about 100 homes and a public swimming pool". "Nordic countries which have long hours of darkness and an increased need for heat in the winter, but extended hours of sunlight in the summer."

Instead of chopping wood, store summer heat for winter use. Probably not a solution for Florida. :) That's OK. it's a simple, easily maintained, non-polluting solution geared for the local conditions in Nordic countries.
 

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Discussion Starter · #11 ·

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Discussion Starter · #20 ·
There are skilled trade labor shortages everywhere.
Concrete masons top the list with 904% growth in demand compared to pre-pandemic numbers.
Electricians have risen 130%.
Plumbers are up 129%.
And carpenters are up 121%.

And of course trucking. There is also a shortage of skilled auto mechanics.

This seems like a fairly broad issue of increased demand for skilled trades coupled with not enough people and a low unemployment rate.

Plus, many don't want to do manual labor. They are going to be a tiktok influencer or video game star.

Seems like we need to get more people who don't mind manual labor, train them, pay an attractive wage. Where will we get these people?
 

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Discussion Starter · #22 ·
Mike Rowe has been saying that for years.we're gonna be in trouble in a few years.
Has he said where we get more people, Bill? Basically, all the people we have are employed.
 

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Discussion Starter · #25 ·
I wonder if there was a source of people trying really hard to come here and join the job market even do manual labor? Canadians maybe? But would Canadian be interested in job training and learning English? :)
 
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