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You would need a lake sized insulated reservoir for that to work. Too much water is used already by those systems, they don't typically want to add another stor
by yetihehe 3y ago
You would need a lake sized insulated reservoir for that to work. Too much water is used already by those systems, they don't typically want to add another storage. Typically they are gigawatt scale systems burning something because just using electricity is too much strain on grid, unless you have a power plant nearby (like cogeneration, which uses waste heat from electricity generation from fossil fuels).
- FredPret 3y agoWhy? Just overheat the water circulating through the district water system when you can. People's thermostats will simply turn off sooner, leaving more heat in the water. Then later, you underheat the water, and the city's various thermostats turn on a bit longer. The risk is that you underheat too much, and people compensate by plugging in their own heaters during underheating. And underheating will occur during expensive energy periods, so this will exacerbate periodic energy shortages. But overall this could work to store a ton of energy - there's a huge volume of water in a district heating system's pipes.
- yetihehe 3y agoTypically water coming out of your heating plant is already at max temperature. Any more and it will start boiling.
- adrianN 3y ago56 Million litres, about 2,5GWh: https://group.vattenfall.com/de/newsroom/pressemitteilungen/2022/deutschlands-groesster-waermespeicher-am-start https://group.vattenfall.com/de/newsroom/pressemitteilungen/...
- ZeroGravitas 3y agoSome places already used flooded mines or other underground reserviors for this purpose. As an added bonus, they're already warm and continually have heat replenished by geothermal heat.