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I created these, I see what you mean about the pressure, since the vessel is always water it'll be in equilibrium; if I was to disregard the bag altogether and create say, a concrete vessel of similar size would it then work? I guess it'd be very similar to the StEnSea project but worth...
Do the seawater intakes not mean that there isn't a need to design against the hydrostatic pressure? As when the bag is empty due to pumping, the chamber will fill up with seawater. Then during generation the bag will fill up, replacing the water in the chamber? There's a diagram in that...
So the system would be originally empty (including the vessel), enough water would be allowed to pass through to fill up the vessel to generate power leaving the pipe empty/filled with air, then would be pumped back out, leaving the pipe empty once again. Similar to how pumped hydro works with...
I've created a concept design of a subsea pumped hydro storage system, and need to use the flow rate in order to calculate power output. I can calculate the energy storage capacity using ##E = mgh##:
$$E = mgh = 25675000×9.81×200 = 50374 MJ = \frac {50374MJ}{3600} = 13992 kWh$$
I've attempted...