Re:Giant 'sand battery' holds a week's heat for a whole town
by londons_explore on Thursday March 14, 2024 @05:10AM
(#39701764)
And this is key to the finances...
Waste material costs over €100/ton to dispose of across most of the EU. So therefore this material costs less than nothing!
That's why the project doesn't use water (which has a 4x higher heat capacity and can be pumped allowing the heat exchangers to be far smaller and eliminating the 'temperature decreases as it discharges' problem).
Waste material costs over €100/ton to dispose of across most of the EU. So therefore this material costs less than nothing!
That's why the project doesn't use water (which has a 4x higher heat capacity and can be pumped allowing the heat exchangers to be far smaller and eliminating the 'temperature decreases as it discharges' problem).