John Dabiri | Opportunities and Challenges for Next-Generation Wind Energy

[@starmon2]

BEAUTIFUL.... when I speak to my friends about Wind energy, I've been pushing the Vertical Axis for at least 8 years, when I first read about it. And hey, when I saw a program that Jay Leno had one on his GARAGE, I was hooked. I didn't hear how much electricity can it produce at 5, 10, 15,20,25, 30, 35 miles an hour and what is that cost/Kw? And does that rotational vibration reduce the system efficiency? How much would a Beta version of this cost? It sounds perfect for poor villages, say in Africa!! Best of Luck and hope you get more Angel Investors... If only I could win the Lottery.

[@788home]

Excellent - I am viewing this in 2022 - what is the status of this project??

[@unalsel7908]

Thank you John Dabiri!

[@belspace]

Great conference John. Thanks for sharing 👍

[@davidwilkie9551]

Impressive research and development

[@AceofDlamonds]

nice vid. I relearned a lot of stuff I remember studying a few years ago.

[@mohannair5671]

Are we obsessed with horizontal axis turbines?

[@blueenergyshowtime]

I wrote a blog a few years ago about VAWT. There are both good and bad aspects of VAWT and HAWT. e-ternity.com.au/technologies/item/25-blue-energy-wind-tower.html I have to point out that every VAWT in the market fails to address the efficiency problem. As you can visualise the air flow passing the axis of a VAWT, half of the energy makes the VAWT working. The other half contributes negatively. It is due to the VAWT design, the positive energy can overcome the negative energy, which makes net energy that can be utilised by the generator. However, for the HAWT, there is no such a problem. So the most challenging part of VAWT is to make the negative contribution wind energy into the POSITIVE contribution. Also about Betz efficiency equation, I think the most missing aspect of such an efficiency limitation is that all the wind turbine designs fails to capture ALL the wind energy and ensure the maximum conversion of uniformity energy flow becomes the torque force that is at the maximum potential. For example, when a HAWT is rotating, those wind energy going through the gaps of turbine blades makes not contribution of the turning. Those wind energy hitting at the blades near the turbine shaft has less contribution than the wind hitting the tips of the turbine blades. So the limitation of Bets equation might not be correct if we find ways to overcome these problems. As you understand, modern hydro turbine has efficiency of 80 to 95% efficiency. After all, there are more to develop wind energy, which should be a very powerful source of renewable.

[@geraldzucawich8365]

new game changer is now avalible with vawt at a lpwer cost per wind swept area

[@imran7075]

Can you estimate the diameter of a wind turbine foundation by considering its rotor diameter and tower height? I am thinking about a gravity based foundation.. I once spoke to a wind guy and he told me it is possible to calculate and then he left off.

[@learn_sow]

Brilliant

[@mohannair5671]

Could we see duch facilities coming up in countries like India,ending coal combustion?

[@fparent]

Interesting (unfortunate?) to see that 7 years later this technology hasn't been adopted. Why is that?

[@grahamflowers]

The gyro wind turbine has smashed and debunked Betz limit regards Graham Flowers

[@grahamflowers]

Betz limit has been smashed and debunked regards Graham S Flowers

[@justtinkering6713]

The problem is; one normal HAWT will produce ten times the power of the same size VAWT and VAWT costs more to manufacture and maintain. You picked a big challenge.

[@Emiliano_Toledo]

In some cases it may be cheaper/easier to mantain the VAWT

[@geraldzucawich8365]

a 10 kwh same size per wind swept area vawt will produce more power not 10 times less