asteroza + underwater   158

Power Generation | Singapore | Sun Cable
This ting is going to run a (10GW?!?) 3800Km HVDC power cable from Australia to Singapore...
long  distance  submarine  underwater  ocean  power  cable  HVDC 
9 weeks ago by asteroza
Oceans S1, the scuba dive computer with buddy communication. by Team Oceans — Kickstarter
Dive comp with an acoustic ping system to grab the attention of other wearers in range. Not texting though.
underwater  diving  communication  acoustic  ping  attention  hardware  electronics  devices 
february 2019 by asteroza
Project Natick Phase 2
They now have a webcam to monitor the the fishes around the datacenter pod
underwater  datacenter  ocean  microsoft  containerized  webcam 
august 2018 by asteroza
UHD Video Transmission Over Bidirectional Underwater Wireless Optical Communication - IEEE Journals & Magazine
Uses green laser for downlink/primary data, blue for uplink/feedback for compensating for poor water clarity
underwater  laser  communications  lasercomm  UWOC  optical  blue  green  adaptive  link  research  technology  video 
may 2018 by asteroza
[1802.06362] Experimental demonstration of three-dimensional broadband underwater acoustic carpet cloak
The military usefulness is limited for submarine surface coatings, but as a hangar for UUV's that can hide in plain sight, or to cover/shield an underwater cable tap, this has some applications...
metamaterial  underwater  acoustic  cloak  cloaking  shield  UACC 
may 2018 by asteroza
Patent US9624034 - Aquatic storage facilities - Google Patents
Amazon patenting underwater storage of goods. Which isn't all that different from acoustic response buoys, like that DARPA upward falling payload program, or columbian drug runners...
Amazon  underwater  package  storage  floating  buoy  warehouse 
july 2017 by asteroza
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
DEDAVE – Deep Diving AUV for Exploration
A cheaper AUV, designed using mass production automotive techniques. Notable is a CANbus internal network, rather than equipment specific wiring harnesses.
UUV  AUV  autonomous  underwater  drone  Fraunhofer  low  cost  CAN-bus  CANbus  Delicious 
february 2016 by asteroza
Nemo's Garden by Ocean Reef Group
Crazy Italians farming in domes under the sea...
underwater  agriculture  dome  garden  ocean  farming  Delicious 
july 2015 by asteroza
AOE Accumulated Ocean Energy Inc - Creating a safe, clean energy for all on Earth.
Using a wave buoy based pump to compress air for a UWCAES setup. Problem is the heat loss (since it would be hard to recover), means you lose a lot of efficiency in the CAES system. I suppose they eat the loss, since the primary power source is renewable wave energy, rather than a grid input.
UWCAES  CAES  underwater  ocean  compressed  air  energy  storage  bag  balloon  green  wave  pump  buoy  Delicious 
september 2014 by asteroza
Commercial Grid Scaling of Energy Bags for Underwater Compressed Air Energy Storage
Some improvements in the design of high tensile strength balloon bags as a compressed air energy storage device, as a spinoff from doing Bigelow Aerospace TransHab style inflatable space station module production and research.
UWCAES  CAES  underwater  ocean  energy  storage  bag  balloon  compressed  air  green  structural  tendon  strip  fabric  textile  research  technology  Delicious 
september 2014 by asteroza
silent, invisible, predictable, renewable energy - tidal technology - openhydro
Didn't know DCNS got involved with these guys. DCNS seems to be pretty active in ocean energy work, what with their submarine nuclear powerplant and OTEC work...
DCNS  tidal  current  open  core  hub  rotor  turbine  power  generator  marine  structure  engineering  green  energy  hardware  electronics  devices  underwater  Delicious 
september 2014 by asteroza
Warp Drive Underwter using Supercavitation
AHSUM concept is a slim underwater turret firing supercavitating bullets for ship torpedo defense. Like an underwater CIWS Phalanx)
AHSUM  high  speed  undersea  munition  underwater  supercavitating  bullet  gun  turret  defense  military  navy  supercavitation  torpedo  Delicious 
august 2014 by asteroza
Exosuit - Nuytco Research Ltd.
Derivative of older hardsuits like JIM, using circular rotary joints. I wonder if that Lasermotive power-over-fiber tech would be suitable for trickle power to the suit over the tether?
EXOSUIT  rotary  joint  hardsuit  underwater  diving  suit  hard  shell  exoskeleton  hardware  ocean  marine  technology  research  Delicious 
march 2014 by asteroza
Microsoft Word - 3D74DD5F-0F88-71E2.doc - design.pdf
Seems to use somewhat low pressure steam being condensed at high flow rates to create a forced induction setup, so a kind of jet pump? In theory, a high speed flash boiler could use sea water to source the steam for the setup since at high enough speeds the boiler shouldn't cake up. I wonder if this could be chained with a marine ramjet downstream?
propulsion  marine  ramjet  underwater  induction  pump  research  jet  forced  steam  condensing  Delicious 
september 2013 by asteroza
F20-152 - F20-152.pdf
Chinese followon to marine ramjet research. Seems just compressed air is not enough to to do a standing start for a marine ramjet (similar issue for conventional ramjets), so they basically spliced in an underwater ramjet into the output of a jetski waterjet to overcome standing start issues. Which makes it a kind of supercharged ramjet?!? They used an air tank at 4 bar output, so a production augmented nozzle for jetskis would combine exhaust with an oversized turbocharger's wastegate output as inputs for the marine ramjet.
marine  ramjet  underwater  waterjet  research  propulsion  augmentation  jetski  thruster  boost  supercharged  nozzle  augmented  Delicious 
september 2013 by asteroza
Marine two-phase jet propulsion and bubbly flows | Fine Rocket Propulsion Center
An underwater ramjet, but really kind of a jet pump/ejector ramjet? Substituting expansion of overcompressed air or a compressed liquid refrigerant (so pressure drop expansion or liquid to gas boiling expansion) injection for a conventional combustion chamber in a ramjet. If one gets enough momentum from the injection to to do a standing start, then it gets pretty simple for a ramjet. One of the patents from this seems to show a pod version and a long blade version, that uses 2D ramjets embedded in the blade. Ultimate, you need some sort of high pressure gas source, either compressed gas, liquid boiling into a gas, or a gas generator. I wonder if this can be mixed with a supercavitation drag reduction system like a skival torpedo, supercavitating the ramjet pod exterior from the same gas generator flow?
marine  ramjet  expansion  pressure  underwater  drop  pump  research  ejector  gas  propulsion  thruster  jet  Delicious 
september 2013 by asteroza
DIFIS - Double Inverted Funnel for the Intervention on Ship wrecks
EU trying to develop a deployable underwater funnel for capturing leaking oil from sunken ships. Too bad a larger version of this wasn't available for the BP spill.
marine  vessel  technology  europe  DIFIS  funnel  underwater  ship  wreck  pollution  ocean  EU  inverted  research  recovery  oil  mitigation  leak  environtment  capture  fuel  tank  maritime  salvage  Delicious 
july 2013 by asteroza
Giant Crabster robot to explore shipwrecks and shallow seas
This summer researchers from the Korean Institute of Ocean Science and Technology (KIOST) will deploy a large robot crab in shallow seas.
CR200  technology  hardware  underwater  RC  Crabster  KIOST  ocean  robot  ROV  hexapod  research  exploration  rover  robotics  devices  korea  electronics  Delicious 
july 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
FILOSE : HomePage
Interesting biomimicry, using piezoelectric sensors emulating lateral lines to detect disturbed and smooth flow, allowing a robot trout to seek smooth current flows (or even calm eddy spaces behind objects), to reduce drag and propulsion power.
water  lateral  piezoelectric  smooth  underwater  drag  trout  line  EU  fin  flow  seeking  research  biomimicry  sensor  propulsion  current  robotics  reduction  FILOSE  Delicious 
march 2013 by asteroza
Marine Tech Factory - Propulsion
Interesting brushless DC motor design for underwater propulsors. On the face of it, I guess what they did was coat a conventional BLDC motor internals with some sort of waterproof coating, and fiddled with the shaft bearing seals. How well will it stand up to saltwater though?
AUV  submarine  devices  electronics  hardware  USV  ROV  propulsor  propulsion  motor  electric  DC  brushless  BLDC  underwater  Delicious 
november 2012 by asteroza
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