turbine   1173

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Aster Thermoacoustics
Interesting work on both thermoacoustic heat sources and matched bidirectional turbines for electrical power generation. Thermoacoustic electrical generators previously used linear alternators, but those prefer faster cycles, which is opposite what the thermoacoustic wants (parts sizing goes up unfavorably when scaling), and slower long stroke linear alternators also have issues (long piston stroke, sealing issues). Using a rectifying bidirectional turbine may be a convenient workaround.
EU  europe  holland  thermoacoustic  research  acoustic  wave  rectifying  bidirectional  turbine  power  generator  cooling  waste  heat  recovery 
12 days ago by asteroza
Wind Turbine Efficiency - DataGenetics
"Some unscientific articles talk about wind power being 100% efficient. That's impossible, as we will see.

"The velocity of the air flowing through the turbine disk is the average of the upstream and downstream velocities.

"The turbine is most efficient when the downstream velocity is one third of the upstream.

That efficiency is exactly 4^2 / 3^3 = 16/27 ~= 59.26%
Betz's Law: No turbine can extract more than 59.26% of the energy of a fluid.

"Real life wind turbines are typically 40-50% efficient."
wind  turbine  fan  blower  efficiency  alternative  energy  windmill  ducted  Lanchester  Zhukovsky  Betz  Betz_Efficiency 
14 days ago by Tonti
Lazareth | Constructeur Auto, Moto, Wazuma
Some french mechanic who specializes in 4 wheel motorcycles built a transforming quadricycle/4 poster jet hoverbike
jet  turbine  hoverbike  quadracycle  vehicle  transportation 
9 weeks ago by asteroza
Team JMCC WING -Water Abundance XPRIZE Competition | Indiegogo
Some sort of low eight high torque wind turbine using fabric blades (and fabric duct), seems to use a pole/wire tensegrity structure
tensegrity  structure  high  torque  wind  turbine  power  generator  fabric  blade  atmospheric  water  fog  collector 
october 2018 by asteroza
O-Wind Turbine | James Dyson Award
Bizarre hybrid HAWT/VAWT to handle chaotic urban wind with substantial vertical and horizontal components with rapidly changing direction
crosswind  vertical  horizontal  vent  ball  wind  turbine  power  generator 
october 2018 by asteroza
The first LEGO set to feature two of the plant-based elements — the new LEGO® Creator Expert Vestas® Wind Turbine
The first LEGO set to feature two of the plant-based elements – check out the new LEGO® Creator Expert Vestas® Wind Turbine. It will blow you away. #LEGOsustainability #PlantsfromPlants #Creativity

Read more about it here:
Lego  sustainability  collaboration  wind  turbine  vestas  from iphone
september 2018 by lorenzowood
3ders.org - 3D printed impeller allows drone to operate for thousands of hours | 3D Printer News & 3D Printing News
3D printing making microturbine turbine blade internal passage air cooling possible, allowing hotter temps thus higher efficiency
3D  printing  fabbing  radial  microturbine  manufacturing  research  technology  air  cooling  cooled  turbine  blade  internal  passage 
september 2018 by asteroza

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