THANK YOU! I saw this complicated formula in the book and just can't figure out where it came from, you explained it perfectly. Also I love the talking speed.
For my fellow students following along, Question 3 contains a small mistake. The final efficiency calculation should've been multiplied by 0.25 instead of the 0.2 that was done by Mr. Masley Still a fantastic resource that's been saving IB students since it was uploaded
In example 3 9:30 the power 40700W should be multiplied by 0.25 not 0.2 as the efficiency is 25% and not 20%. The useful power output should be 10175W. For anyone confused
Thanks Andy for this tutorial. I have a question. Say the wind speed is not uniform in the area A (due to Atmospheric Boundary Layer effects, obstructions due to trues/buildings), which speed do I use: the average, or do I need to do an integral (as the speed is depending also seen form the center of the turbine axis), or otherwise? In my case I have a speed distribution of the area A, so how do I calculate the power of the wind in that area A? Any help/hint/article/literature is welcome. Thanks and best wishes for 2024.
In the graph shown in the beginning, why isn't hydro shown as part of renewables? Is it because it is comparatively larger than all the other renewables combined?
Very clear, thanks. Q1: why do you use very high air densities (1.4 and 1.8 kg/m3)? These are only experienced at -40 and -80celcius respectively - temperatures only experienced in the Antarctic winter). Ambient air is typically closer to 1.25 kg/m3 Q2: why would air density increase by so much across the turbine? I feel it is better to stick with typical real world data when known to avoid confusing students.
Hello how can you proof that the theoretical energy of air passing through a wind turbine is proportional to the square of the diameter of the turbine?
Hello, Nice video. Just a thought to share. You say, "The Power before minus the power after is the power that was gained by the wind turbine" I think not quite true. The power difference calculated represents the power available to the wind turbine. Other factors of power losses and efficiencies decrease the available power to want the turbine would actually capture. Some may think this is a small thing, but actually may have a rather large impact. Keep up the good works! ----
Thanks! This is how the IB test calculated and graded it. In reality it's more complex, but this is the basic formula students need to know for the test.
There is no kinetic energy in the wind there is force Mv squared kinetic energy is the energy of consistent work from a consistent force regards Graham Flowers
THANK YOU! I saw this complicated formula in the book and just can't figure out where it came from, you explained it perfectly. Also I love the talking speed.
For my fellow students following along, Question 3 contains a small mistake. The final efficiency calculation should've been multiplied by 0.25 instead of the 0.2 that was done by Mr. Masley
Still a fantastic resource that's been saving IB students since it was uploaded
Thank you this lesson is very important of every one went to learn wind turbine. its helps you
In example 3 9:30 the power 40700W should be multiplied by 0.25 not 0.2 as the efficiency is 25% and not 20%. The useful power output should be 10175W. For anyone confused
Thank you so much Mr Andy for this informative video!!! May God bless you
To the point explanation. Well done 👍
when will you make videos on 8.2? Would be really helpful thank you
Haven't had time this year unfortunately :/
Hey Andy, when can I expect the 8.2 videos to be out? Thank you sm
Not sure :( year got busy
Thanks Andy for this tutorial. I have a question. Say the wind speed is not uniform in the area A (due to Atmospheric Boundary Layer effects, obstructions due to trues/buildings), which speed do I use: the average, or do I need to do an integral (as the speed is depending also seen form the center of the turbine axis), or otherwise? In my case I have a speed distribution of the area A, so how do I calculate the power of the wind in that area A? Any help/hint/article/literature is welcome. Thanks and best wishes for 2024.
In the graph shown in the beginning, why isn't hydro shown as part of renewables? Is it because it is comparatively larger than all the other renewables combined?
Loved it. Very easy to understand. thank u
Very clear, thanks.
Q1: why do you use very high air densities (1.4 and 1.8 kg/m3)? These are only experienced at -40 and -80celcius respectively - temperatures only experienced in the Antarctic winter). Ambient air is typically closer to 1.25 kg/m3
Q2: why would air density increase by so much across the turbine?
I feel it is better to stick with typical real world data when known to avoid confusing students.
Excellent
Hello how can you proof that the theoretical energy of air passing through a wind turbine is proportional to the square of the diameter of the turbine?
Use this method: ua-cam.com/video/PDcaMDb-mPU/v-deo.html
Betz limit applied?
Very well explained
Another good video!
Hello,
Nice video.
Just a thought to share.
You say, "The Power before minus the power after is the power that was gained by the wind turbine"
I think not quite true. The power difference calculated represents the power available to the wind turbine. Other factors of power losses and efficiencies decrease the available power to want the turbine would actually capture.
Some may think this is a small thing, but actually may have a rather large impact.
Keep up the good works!
----
Thanks! This is how the IB test calculated and graded it. In reality it's more complex, but this is the basic formula students need to know for the test.
Idk what's the difference between r or L? My teacher says that A= piL² is more used in work rather than A=pir²
THANK YOU SO MUCH, I'm be taking my board exam this September. Hope be back in this comment as an Engr. 😭🙏
Please come back and let us know how it went! You got this!
Betz limit has been smashed and debunked.the wind pushes what it touches it can't push on the gaps between the blades regards Graham Flowers
There is no kinetic energy in the wind there is force Mv squared kinetic energy is the energy of consistent work from a consistent force regards Graham Flowers
The gyro wind turbine has smashed and debunked Betz limit regards Graham Flowers
wind can only push on the individual blade surface it can not push on the gaps between the blades Betz limit is a sham regards Graham Flowers
Hi Andy, Power isn’t E/t. Energy =Power/time. So the way you derived the equation can be misleading
This is incorrect! Energy = power*time
Your video is very useful, thank you. But you talked too fast, I can's read the page before you moved it. I have to stop the video every second.