asteroza + turbulence   6

Self-sustained biphasic catalytic particle turbulence | Nature Communications
Adding a little hydrofluoroether (HFE) organic solvent to a water based turbulent heater exchanger ups heat transfer 5x because the bubbling action assisted by the HFE pulls new cold liquid to the heat exchanger surface
hydrofluoroether  HFE  turbulent  water  heat  exchanger  cooling  research  technology  transfer  turbulence  active  particle  agitation 
9 weeks ago by asteroza
An experimental study on the effects of relative rotation direction on the wake interferences among tandem wind turbines - Springer
Interesting result. Basically, if you close pack turbines, make sure you evenly mix clockwise/counterclockwise rotating turbines to exploit wake turbulence effects. Which sorta goes against the common practice of having all turbines in an array of the same type/rotation. I wonder what happens if the wind turbines are not single rotor, but dual rotor counterrotating turbines? Would the counterrotation cancel out the wake turbulence for downstream turbines, negating the effects?
wind  turbine  spacing  research  HAWT  CRWT  counterrotating  wake  turbulence  aerodynamics  Delicious 
june 2014 by asteroza
Humdinger :: Windbelt Large
Using the buzzing effect of a taut belt in wind, these guys use a piezoelectric fabric to recover the vibration energy of the belt as it resonates in the passing wind turbulence. The only big issue I can see is the noise generated, as by design you lose a fair amount of wind generated power to acoustic loses
Humdinger  Windbelt  piezoelectric  fabric  belt  vibration  resonance  wind  noise  oscillation  turbulence  power  generator  harvesting  scavenging  green  energy  Delicious 
july 2011 by asteroza
Masdar/WINDSTALK | Atelier DNA
I'm having a little trouble figuring out how you get the poles to lean back and forth in a steady wind. Artificially texture the pole surface to create turbulence maybe? Is there enough natural turbulence and wind speed change to ensure the pole swings enough to generate a practical amount of energy? I wonder if this could be built in a smaller form like some sort of rooftop astroturf module for building retrofits?
windstalk  piezoelectric  cantilever  beam  pole  wind  turbulence  power  generator  green  energy  high  density  footprint  alternative  Delicious 
october 2010 by asteroza
Levitating Magnet May Yield New Approach To Clean Energy
I'm a little stumped as to how the floating magnet is supposed to control things when it is floating via a rather large externally applied magnetic field. I guess there must be some field orientation advantage compared to simply applying a larger field from outside. I wonder if this could be applied to SMES or other cryogenic systems to remove the supports that contribute to heat leakage?
levitation  levitating  floating  magnet  superconductor  superconducting  turbulence  turbulent  plasma  pinch  fusion  experiment  energy  research  heat  leakage  control  Delicious 
february 2010 by asteroza

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