Compressed air has a similar energy density to, but a lot
less complexity than, battery power. Now, if you need
your leaves blowing (personally, I leaves them), you're
going to need a leaf blower. These are traditionally
smelly 2 stroke contraptions. Although there are
powered types. Their existence, and battery-
compressed air parity, demonstrates the energetic
feasibility of the device.
Now, you may wish to use the compressed air to power a
turbine to move a centrifugal blower around and blow
leaves around that way. You may also think: "I can direct
the turbine exhaust into the main stream giving me a bit
of a free lunch" which would be nice for you. This is
Mr Dyson enters the fray.
James Dyson, just occasionally, takes a break from
reinventing the wheel, outsourcing jobs and looking
to yell at engineers until they make him a bladeless fan.
This uses air, compressed by a fan, to move more air. It
uses the Coanda; effect, or Bernouli effect....
effect at least.
If we put these two together, we can have a truly*
bladeless air mover. Then, you are free to spend your
Sunday mornings moving leaves around in a quieter
manner, which will have the knock-on effect of
fewer people that your marriage is dysfunctional.
*we're onto you Dyson, there's blades on the fan hidden