asteroza + concrete + energy   17

Storing energy at sea - Forschung Energiespeicher
Recent practical testing of using vacuum style concrete spheres at depth in underwater scenarios to store energy, by pumping seawater in/out of the sphere. Had a practical test to 100m, current pump/turbine tech limited to 700m...
pumped  hydroelectric  power  generator  underwater  vacuum  concrete  sphere  Fraunhofer  storage  energy  StEnSEA 
march 2017 by asteroza
airlight energy
Hrm, one type is a concrete trough with inflatable membranes as a general solar concentrator type, the other is a concentrator dish using an array of flat disc mirrors.
CPV  inflatable  solar  concrete  trough  CSP  thermal  PV  hybrid  power  generator  green  energy  Delicious 
september 2014 by asteroza
Electricity and Power Storage - Ares North America
Someone is finally getting around to implementing heavy electric trains on long grades as a gird energy storage system. Though admittedly the current system is smaller scale and for load leveling a wind power plant, and using narrow gauge rail along with a third rail in rural settings seems like a poor choice in the long term. Concept is sound, but having individual motor/generator cars is an interesting compromise. As long as the primary weight can be provided by cheap gravel, I suppose it doesn't matter.
railroad  electric  green  potential  leveling  railway  ARES  rail  grid  train  power  generator  load  energy  storage  gravity  concrete  gravel  battery  Delicious 
august 2013 by asteroza
IEEE Xplore - Ocean Renewable Energy Storage (ORES) System: Analysis of an Undersea Energy Storage Concept
Hollow concrete sphere anchors for floating wind turbines do double duty, anchor the turbine, and serving as an energy storage subsystem by pumping water out of the sphere at depth. 30m sphere stores roughly 6MWhr, sweet spot is 750m depth, economically viable at 400m, works at 200m in a pinch, 1500m is pushing it (stress fracture implosion of the vapor head inside would be fierce).
marine  shell  structure  pumped  hardware  underwater  undersea  sphere  ocean  hydro  concrete  anchor  suction  energy  storage  Delicious 
may 2013 by asteroza
One Per Cent: Green Machine: Storing wind power beneath the waves
This seems to be describing an underwater CAES setup, but I though the original concept was actually a pumped hydro based concept. Basically, a strong in compression concrete sphere has a positive displacement pump/generator placed on it, and pumps water out of the sphere at depth. This emulates a pumped hydro dam/lake/reservoir but with a huge hydraulic head. With a deep underwater CAES setup, you run the risk of the sphere becoming buoyant, which kinda defeats the secondary purpose of being an offshore floating wind turbine platform's anchor. Maybe it isn't actually CAES but a simple pressure regulation system to maintain minimum pressure to prevent excess vapor formation (and the risk of ice accumulation)?
CAES  ORES  ocean  offshore  renewable  energy  storage  concrete  sphere  pressure  differential  pumped  hydroelectric  power  generator  green  energy  grid  hydraulic  Delicious 
december 2011 by asteroza
Biorock
If you accept that direct room temperature electrolysis has a poor efficiency, and that doing hydrogen production using mineral accreation electrodes in seawater has a similar efficiency, one can make the arguement that you might as well make the Biorock if you are going to do direct electrolysis anyways. You also create the semiporous seacrete/artifical rock that can be used as stable foundations for coral growth and ocean ecosystem recovery, or as a direct building material like concrete (though not high strength).
Biorock  seawater  ocean  artificial  rock  accretion  electroaccretion  electrodeposition  sea  seacrete  concrete  hydrogen  production  green  energy  construction  materials  science  research  technology  mineral  deposition  Delicious 
july 2010 by asteroza

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