Now the compressed air in the tower could be used differently, as a storage means. But in this case, the combination of a hypothetically greater resistance to reach a higher height and storage would be possible but within some limits.
The idea of storing compressed air in the tower is not new.
Conventional CAES schemes are based on air at very high pressures of 170 bar or more, but in wind turbine applications such pressures are impractical and not necessary.
A storage pressure of as little as 10 bar can provide enough stored energy for a practical system. Such a low pressure should be accommodated with little modification of the turbine buoyancy chamber, which has to be of significant wall thickness to cope with normal transport and operating stresses.
In its simplest form, a CAES system for an offshore wind turbine would use a multistage compressor driven from the electrical output of the turbine generator, and a separate expander-driven generator, to feed back the stored energy when there is sufficient demand.
This information could also be useful if the option of a more rigid and taller tower by using compressed air is favored.