Science 101- you can't create energy from nothing- the power
generated from this "idea" (assuming can even be made to begin
with) comes form the trains- with are in turn powered by other
means that we have to generate.
In short this system will never generate more power then that was
put into it, hence it isn't really a useful means of power
generation, but rather a system to reduce the net loss of energy...
kinda like regenerative braking. But I suspect regenerative
breaking is far more efficent.
Also the train does not create an airtight seal in the tunnel,
hence it does not compress the air in the tunnel in front of it at
all. Even if the tunnel was entirely airtight, it won't compress
air any more then an smarties candy sealed in a the smarties tube
will compress air by shaking it back and forth. The primary effect
of air in our MRT tunnels is drag, not his "forceful
compression".
Not to mention, even if we did somehow rig the system to compress
air... the energy required to do so will always be returned less...
not to mention it slows the train down for no good reason to
recycle energy for what? The only justifiable use I can see for his
technology is to use the compressive method to brake and stop
trains, and the energy generate recycled to run other systems so it
is not wasted... but as people noted there are easier and more
efficent systems for recycling energy.
This guy needs to do some reading on his science.