Comment on [SciShow] How To Make Buildings Into Batteries
Five@slrpnk.net 1 month agoThe petro-billionaire people who brought you “The Line” are joining up with the badly conceived Octopus Crane Tower idea to bring you something that definitely will never be built and probably has deep conceptual flaws. The important thing to take away from this is that the people causing the climate crisis have a clever solution, and you can continue living your life as if things will eventually return to the pre-climate crisis status quo.
evasive_chimpanzee@lemmy.world 1 month ago
I’m pretty disappointed in scishow for this one. Usually, they are pretty good.
There are, in fact, deep conceptual flaws. There are a lot of grifters trying to sell ideas to fight climate change that can be easily defeated by high school level math. They try and spin the obvious shortcomings as “engineering challenges” where you could figure out a way to make it more efficient if only you invested in them enough. The math just doesn’t even check out at 100% efficiency.
Potential energy is mgh. Let’s do the math for the Burj Khalifa. The top floor is at 585 meters. According to their published fact sheet, there are 57 elevators, and the service elevator has a capacity of 5500 kg. Let’s pretend that every elevator has this capacity, and they all go to the top. It would store 5500579.8*585=1.797 GJ. This is about 500 kWh, or about the energy used by 17 average American homes for a day.
According to wikipedia, the cheapest Tesla has a 57 kWh battery, so if there are 10 electric cars in the parking garage, they can store more energy than all the elevators.
Hyperloops have the exact same issue, the math never checks out, so any company promoting them is fraudulent.