PRODUCT LIBRARY
a simple tap at the temple of the frames activates rich directional sound, allowing wearers to 'seamlessly press play on the soundtrack of their lives'.
connections: 73
no, volkswagen isn't changing its name to 'voltswagen' in the US.
connections: +530
virgin galactic designs its spaceship III with a modular design that will lay the foundation for the manufacture of future space planes.
connections: 78
the wind catcher by KiteX — which comes in two versions — works in conjunction with solar panels or separately by generating power in situations when solar power is not enough.
connections: 49
I do not understand the thinking here. These constructions are ugly and way more expensive than existing HAWT designs.
Is the aim to prove that diffuser works and could be designed better or is the aim to find an alternative to HAWT’s all together.
When you develop a design concept it is critically important that you think strategic and that you aim to solve a real problem.
Regarding the Betz equation ducted wind turbines never achieve performance beyond the Betz limit but may well achieve higher performance than standard HAWT’s due to the eliminated problem with the tip vortices.
Regarding LCOE the ducted solution may also outperform HAWT’s if the lifetime expectancy can be improved by lessened vibrations.
The core problem is not CFD analysis of the ducts but analysis of how to make them cheap to produce and erect.
Spot on Mike Barnard. And to claim performance almost three times Betz is absurd. Another “breakthrough” that will no doubt soon disappear…
Sorry but this one while it will work, will cost far more than just increasing the dia by 63% without the heavy, costly, hard to support shroud for the same output.
Shrouds just can’t be worthwhile compared to a regular 3 blade WT by basic physics, weight. At least not cost effectively.
Great concept and a unique design. I have one suggestion for Krishan. If the weight of the blade is taken off the axle of the generator rotor and transferred to the stationary ring (front airstream concentrator) by fixing the blade tips with tapered-roller bearings sliding on a outer bearing race mounted on the concentrator, the mechanical efficiency of the turbine can be enhanced even further. It will be a great idea to develop a micro-turbine for off-grid domestic application. Currently micro-turbines have not become popular and widespread for two reasons: (i) limitation of minimum wind speed needed, which is around 5-7 m/sec, and (ii) need for minimum pole height of 3 m to avoid turbulent flow of windstream in the vicinity of concrete structures over building rooftops. I would be much interested to collaborate on such a development in micro-turbines.
FAntastics news!!! Let’s get these up and running ASAP please!!!
Pretty, but also pretty unlikely. This triggers about eight of thirteen red flags from my list of questions that should be asked about any novel wind generation device. He’s inverted the shroud and called it a diffuser which is amusing, but other than that it shares the problems with shrouded technology, which is that what seems to work in simulation just never works out in the real world, despite over 80 years of attempts.
The diffuser itself of course creates a huge and expensive surface that is both much more costly than traditional HAWTs but also much more fragile and subject to wind buffeting induced failure, as others in this space keep finding out.
It’s pretty typical for efforts such as this to both attack the iconic HAWT technology and get their facts about HAWTs wrong. Pity that this design studio managed it while according to them being in collaboration with organizations involved in the wind industry; you would have thought they might think to have their facts checked and to no attack their collaborator’s. Bad form in multiple ways.
All-in-all, the odds that this 3D-modeler has found something that has eluded every other person, group, serious research institute and governmental agency engaged in harvesting wind energy for the past 100 years are virtually zero. But they do make pretty models.
http://barnardonwind.com/2013/05/08/invest-carefully-wind-energy-innovations-are-rarely-kosher/
krishan,
I am interested in knowing the test result of a specific size wind turbine (i.e. 4 or 6 feet rotor) in terms of kWp? I see this as auxiliary power to the Zero Energy cost renewable vessel being developed. Looking forward to receiving a response and having a dialogue with you.
Regards,
Henning Jacobsen
HJA Solutions
Incredible invention that can really be useful for the environment. Anything created for the good of the environment is always good since it means making the world a better place to live in. What’s more amazing is that, it is done through 3D printing.