3 ms·
They didn't forget - it's addressed in detail. They are advocating "small scale" The low efficiency is mainly since air heats up during compression. This wast
by josefresco 8y ago
They didn't forget - it's addressed in detail. They are advocating "small scale"
The low efficiency is mainly since air heats up during compression. This waste heat, which holds a large share of the energy input, is dumped into the atmosphere. A related problem is that air cools down when it is decompressed, lowering electricity production and possibly freezing the water vapour in the air. To avoid this, large-scale CAES plants heat the air prior to expansion using natural gas fuel, which further deteriorates the system efficiency and makes renewable energy storage dependent on fossil fuels.
- davidhyde 8y agoGoing "small scale" does not solve the heat problem unfortunately. If it does then the authors did not mention it. All they mentioned is how large scale plants deal with the problem.
- josefresco 8y agoCome on dude... Small-scale compressed air energy storage systems with high air pressures turn the inefficiency of compression and expansion into an advantage. While large-scale AA-CAES aims to recover the heat of compression with the aim of maximizing electricity production, these small-scale systems take advantage of the temperature differences to allow trigeneration of electrical, heating and cooling power.
- Neeek 8y agoAnd then also goes in to detail about small scale iso-thermal setups that have negligible thermal losses. Apparently "author did not mention" actually means "I did not read the article".
- deleted 8y ago[deleted]