asteroza + saw   8

Hydraulic Hydro Storage: The Optimal Energy Storage System
Interesting take on pumped hydro, using a giant solid stone piston for the compression mass, cut using an upper and lower ring tunnel connected by a wire saw. So basically an excavate in place scheme for a high mass, rather than say Gravity Power, which uses a vertical TBM and an artificial (concrete?) piston. Still uses water as the working fluid, no indication if this is closed loop. Some of the drawings even show the piston cut from the ground surface, which means as you store energy, this giant cylinder rock mass rises from the ground like a mountain...
pumped  wire  monolithic  green  cylinder  stone  hydro  mass  piston  power  generator  hydroelectric  saw  compression  energy  gravity  storage  Delicious 
july 2013 by asteroza
[0912.5390] Highly efficient photovoltaic energy conversion using surface acoustic waves in piezoelectric semiconductors
I think this is implying using piezoelectric setup, where an acoustic wave wiggles the material, creating imbalances to collect solar PV charges (rather than inherent doped electrons and holes like normal solar cells), which get hauled over to electrodes. I don't think this is implying something like thermoacoustic piezoelectric generators...
SAW  surface  acoustic  wave  charge  transport  solar  photovoltaic  energy  conversion  piezoelectric  semiconductor  PV  power  generator  green  materials  science  research  technology  Delicious 
june 2011 by asteroza

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