

https://dothemath.ucsd.edu/2011/11/pump-up-the-storage/
The main problem with gravitational storage is that it is incredibly weak compared to chemical, compressed air, or flywheel techniques (see the post on home energy storage options). For example, to get the amount of energy stored in a single AA battery, we would have to lift 100 kg (220 lb) 10 m (33 ft) to match it. To match the energy contained in a gallon of gasoline, we would have to lift 13 tons of water (3500 gallons) one kilometer high (3,280 feet). It is clear that the energy density of gravitational storage is severely disadvantaged.
It seems the problem is not necessarily one of conversion efficiency, but rather of scale. In order to store significant amounts of electrical energy using mechanical means, you need to move a lot of weight. Manufacturing the concrete blocks requires money and raw materials, and a pulley system robust enough to move them around wouldn’t be cheap either. The pumped storage hydroelectric systems which currently provide the vast majority of our grid energy storage partially circumvent this expense by taking advantage of natural bodies of water and advantageous topography.
That being said, it’s definitely a fascinating concept and one worth exploring. But there are well established difficulties that explain why this type of energy storage isn’t already widespread.




He did something wrong. But the vitriolic, puerile response to this whole episode, coming from all directions, confirms his overarching argument beyond any doubt.
The fediverse is a place that harbors a disproportionate number of misanthropes and people who have struggled in their personal lives for a variety of reasons. And I have always hoped that could become a strength of ours, but I have come to realize that an internet forum is not a venue that is conducive to healing broken people. Instead, it seems to amplify their toxicity in the vast majority of cases. Based on the behavior I have observed, which has continued to worsen over the years, this platform will perhaps never succeed in its objectives. It seems that it would require an act of god at this point.
The brief period after the APIcalypse seems like a distant dream now. There are still many fine people here who are doing their best, but the majority of emotionally stable, casual users have steadily, silently abandoned this sinking ship over the years. And it shows. Taking glee in another person’s pain and downfall is not the behavior of a mature, emotionally well adjusted adult. We clearly have precious few of those remaining on this platform. Perhaps that is also the case for our society in general, to be fair.
I’m not the type to quit, but I just can’t find much enjoyment in coming here anymore. Thanks to the open ended format of the network, there will always be hope. But it’s incredibly exhausting to watch users chase away and harass anyone and everyone who plays any sort of productive role in the development and/or administration of the platform. Not only are they doing it for free, but they also have to deal with a peanut gallery of cackling hyenas, just waiting for any opportunity to desecrate their corpse. What a sad state of affairs.