Editing Compressed-air car (section)

===Compressed air production and storage===

Compressed air can also be produced by attaching an [[air compressor]] or [[hydraulic pump]] to a wind turbine <ref name="fieldlines.com">{{cite web|url=https://www.fieldlines.com/index.php?topic=148883.0 |title=Wind turbine air compressor. |accessdate=2015-07-13}}</ref><ref name="researchgate.net">{{cite web|url=https://www.researchgate.net/publication/320288204 |title=Open Accumulator Isothermal Compressed Air Energy Storage (OA-ICAES) System  |accessdate=2018-07-13}}</ref> or by using a river, tidal or wave [[hydropower]] turbine. These all convert directly from mechanical to pneumatic energy. Eliminating electricity from the cycle gives higher efficiency overall. It is also possible to use thermal solar energy with a parabolic or [[Fresnel lens]] [[solar concentrator]] to power a thermal [[Stirling engine]]. This can move the compressor or pump. Solar Stirling is more efficient than solar steam or photovoltaic{{cn|date=May 2025}}.