Compressed air storage power generation on a micro scale

[veggie]

Well this looks interesting.
I can imagine a small changfa or listeroid running on waste oils charging up this type of system.

https://www.lowtechmagazine.com/2018/05/ditch-the-batteries-off-the-grid-compressed-air-energy-storage.html

This part cough my eye ...

"By discharging the cylinders sequentially, the discharge time can be greatly increased, making the system comparable to lead-acid batteries in terms of energy density. Based on their experimental set-up, the researchers calculated the efficiencies for different starting pressures and numbers of cylinders. They found that 57 interconnected cylinders of 10 litre each, operating at 5 bar, could fulfill the job of four 24V batteries for 20 consecutive hours, all while having a surprisingly small footprint of just 0.6 m3.

[Henry W]

This is interesting. Thanks for posting this. I'll be reading more.