11–20 of 95 posts
https://www.cottagecraftworks.com/home-goods/self-sufficient...
For fixed-site applications of sufficient land area and scale, it's difficult to beat pumped-storage hydroelectricity (PSH). The round-trip efficiency is around or above 70%, the same or better than CAES. CAES is probably best used in applications similar to flywheel (FES), away from occupied areas.
Do you have any recommendations on how to learn more about this? My brother has a steep hill on his property and Ive been wondering about the feasibility of PSH. How high the tank should be, the equipment, the power output.
It at least gets you all the right words to start googling for turbine options which helped me to do some back of the envelope math. It's a steeper hill than seemed feasible to me.
Some guys I know built a full-sized car, with the engine built with Lego and powered by compressed air. https://www.youtube.com/watch?v=_ObE4_nMCjE
I'll admit this article describes a much less bad system than what I envision when someone mentions compressed air energy storage. On a side note, I wonder what the state of research is on reducing the embodied energy in li-ion battery production. The mentioned figure in the article is surprisingly high (2-10 times the total energy the battery will store - presumably they mean over its lifetime), which now that I thi…
Certainly not 10 times the total energy the kwh of battery capacity will store. Probably not more energy than the battery will store.
I'll admit this article describes a much less bad system than what I envision when someone mentions compressed air energy storage. On a side note, I wonder what the state of research is on reducing the embodied energy in li-ion battery production. The mentioned figure in the article is surprisingly high (2-10 times the total energy the battery will store - presumably they mean over its lifetime), which now that I thi…
Are the figures correct, I couldn't find much follow up to that study?
I can imagine small-scale CAES being ideal where there is also a cooling load (eg humid tropics), since the expanding air will be cool and dry.
I'll admit this article describes a much less bad system than what I envision when someone mentions compressed air energy storage. On a side note, I wonder what the state of research is on reducing the embodied energy in li-ion battery production. The mentioned figure in the article is surprisingly high (2-10 times the total energy the battery will store - presumably they mean over its lifetime), which now that I thi…
Blenders, washers, dryers, dish washers, garage door openers. Basically anything that uses a motor.
This article seems to assume we'd convert the compressed air to electricity, but I could think of a bunch of applications that could use mechanical air power instead. Blenders, washers, dryers, dish washers, garage door openers. Basically anything that uses a motor.