1 Off topic but I think related to your past expertise:
http://www.theglobeandmail.com/report-on-business/industry-news/energy-and-resources/hydrostor-launches-compressed-air-power-storage-system-off-toronto-island/article27306527/

I figured I'd ask someone who might know:  why does it make economic sense to compress air at the bottom of a lake rather than some normal method?  Does this seem like a good idea or some kind of scam?

2

The reason for putting the tanks at the bottom of a lake is so that external pressure of the water takes up some of the load for the tank to cope with the internal air pressure.

Can it work? No question, it could. With most of these systems that isn't really the issue. The issue is: could it be scaled up enough to make a real difference? And as to that I have my doubts.

Is it a scam? Almost certainly. The way you can tell is that they talk about how much power (in megawatts) it can provide when running but never talk about how much energy (in giga-joules or kilowatt-hours) it can store.

The cost of commercial systems would range from about $15-million for a five-MW system to about $200-million for a 100-MW system.

100 MW is fine -- but how long can it run at the power level before the energy is exhausted? What if it only lasts five minutes?

Having said all that, please do not do this again.