Having worked in the wind industry since early 1980's (started in San Gorgonio Pass, Palm Springs, CA, USA) I have see all types, stall machines up to now pitch regulated. Good video.
Thank you so much!! I have spent the last few days banging my head against academic papers trying to understand this stuff for a project, finding your videos has been a godsend!
i'm an french energy engineering student and i've watched this video a couple of times to fully understant all of it! it's so well explained! thank you very much for your work and the time you spent making this (with subtitles) i was watching it one more time and i realised you used she/her pronouns for the pilot and this made my day! we love representation! thank you for everything !!
Merci beaucoup! I used to get so sick of all the text book examples being male while I was studying. It made me feel excluded. So I like to start to balance it out a bit 😀
Glad it was helpful! I didn't realise when I made this video that so many people wanted to know about stall and pitch regulation... let me know if there are any other related topics you would like to see a video on 😀
Great video! Was really helpful and informative. I loved the way you presented the topic along with a pleasant and smiling face. Looking forward to seeing a lot more of your positive and cheerful content. Thank you for making engineering easier.
Your videos are super awesome. I am part of a college team making a solar and wind powered robot to transport weight. Your mention of formulas allow a lot of personal research is super nice. Thanks! :)
Hey wow, a solar and wind powered robot?! That combines 3 of my favourite engineering topics 😍 If you would just add lasers then that would be pretty much my dream project! Does the robot have batteries that are charged by the solar and wind, or are they actually mounted on the robot itself? I would love to see photos! You could post them on my facebook page facebook.com/EngineeringwithRosie/ or tag me on instagram @engineeringwithrosie
@@EngineeringwithRosie I will be sure to post on your Facebook page in April. The robot is only allowed one rechargeable AAA battery. No additional other batteries allowed. The energy stored must be mechanical or electrical. So, we are using supercapacitors. The rules state that the solar and wind equipment must be mounted on the robot. While the robot is in the charging zone, the simulated light and wind will be a couple of inches away. Our estimates is that we will gather 10-40 watts of energy.
Can you please go into detail about a pitch bearing. What is the typical size, diameter and length, materials (all stainless?), the cost, the weight, the vendors? Please show a diagram, engineering drawings, photos, and hold one up to the video camera at different angles. Thanks, Steve Hines
Why are the generators located at the hub rather than the base of the windmill? Wouldn't it be a better design to keep the high maintenance parts at the base? If you were to locate generation at the base, you could put two generators on the shaft and have one as a backup and also to take the excess loading in high winds.
Having the generator at the base adds complexity and cost. It would require a strong mechanism to transfer the motion of the rotor to the generator on the ground. Adding that mechanism would also decrease efficiency because of extra friction and parasitic losses.
I wonder whether the airfoil should be set to a fixed maximum Angle of Attack greater than the Critical Angle, and then use Leading Edge Slats (much smaller and maybe easier to implement) to power the flow around the blade. That way, the default condition is that the blade is nearly unpowered by the wind (but has large drag) until the slat is deployed.
What sort of technological advancement was necessary for the pitch bearings to become viable? More durable materials? Different manufacturing technique?
Hey Rosie. Lookin' good Love. Haven't watched the whole video yet, but dig it so far. Propellers stall? Of course, but let's get into the nuts and bolts of why?
Thank you for such clear explanation. I was having difficulty understanding the difference between stall and pitch. Could you make another video on stall regulation using trailing edge flap?
Rasheed Kammiel in structural analysis we are in love to analysis for different loading condition and in case we miss on loading condition we will be in big treble, can you sort these loading conditions in blade design
In a diy wind turbine I've seen, a special "tail-fin" was used to rotate the entire wind turbine so that it faced perpendicular to the wind. Is this something that is ever seen in commercial turbines?
@@abdullahal-junaibi3656 sure! That is a good topic for a video, I will add it to my list. In the meantime, I mention it briefly in this video on Wind Turbine Design Evolution. Near the end I visit an offshore wind farm and talk about why that is a good location for a wind turbine: ua-cam.com/video/LJTcVEAojqw/v-deo.html
Hi Rosie, I am wondering about the direction of lift force relative to the turbine shaft. I thought that due to high tip speed, the direction of lift is more along the turbine shaft then perpendicular. Does it then have a significant contribution to generator torque? Regards, Maarten
Hello Rosie, just wanted to confirm the blade direction; according to the zoomed bubble shown at 3.49min, is it the tail of the air foil which faces the wind ? Thanks
Does increasing the size of the turbine make it easier to allow the turbine keep generating power when it's very windy? Are some of these huge turbines that are now being produced able to take advantage of really high winds?
Glad it was helpful! And to answer your question, I am pretty new to UA-cam, it takes some time for my videos to get recommended over the bigger channels 😄
I live in Dayton OH Vandalia 45377. They don't allow vertical wind mills. But this are has an interchange 70/75 interstates, what I would like to know is how much energy we lose everyday by not having small scale wind turbines to collect roadside. especially where community walls are preplaced and I think this will produce weather the the vehical is gas desiel or EV. thanks
It significantly extends the range of wind speeds that the turbine can operate close to rated power. I will dig up a couple of power curves for a pitch and stall regulated turbine and get back to you with some actual numbers. That could be a good topic for a video, actually... thanks for the suggestion 😀
What are the causes that can lead these adjustments to fail? I saw many videos about turbine accidents and I would like to know the possible causes for this.
Awesome video Rosie! Im keen to learn more about the additional braking mechanisms that modern wind farms use, in addition to pitch control. Ive heard that they also have mechanical disc brakes. If a wind farm is at full speed and needs to stop, is pitch control sufficient or is an additional method necessary?
Some modern wind turbines do not have remotely-controlled mechanical brakes, they simply use pitch control to slow the rotor and then feather the blades to minimise loads and "pinwheel". You can always lock them in place, but often you need to be actually in the nacelle to do that. You need to be able to mechanically lock them so that they can't move around while maintenance workers are inside the blades.
General good explanation. But I disagree that the blade is pushed up by the high pressure below AND pulled up by the low pressure on the top. 2:28. The low pressure presses the blade DOWN, but less so than the high pressure presses up. The differential pressure matters. It would have been more correct and simpler to just mention the high pressure below.
Hello Rosie, I like all your video's, Does a mechanically driven pitch control work just as well as an electrically or hydraulically driven pitch control? I plan to buy a 10 KW wind turbine so I try to find out as much as possible in advance
Hi Rosie, thanks, another great video. Quick question - do modern day turbine blades use 'washout'. On gliders (wide wingspans, low flying speeds typically) the wings angle of attack flattens out towards each wingtip, thus reducing the likelihood of a tip stall in a turn. It seems to me that a turbine blade (bit like any old propeller) gets faster, relatively, the further out you go and so, in order to reduce induced drag, etc., it would make sense to flatten it off. Another thought, planes now have the little vertical fin at the ends of their wings in order to reduce efficiency losses due to the reconciliation of the two air flows - upper and lower - in that area, might be useful on turbine blades I wonder? Anyway, look forward to your thoughts. Jerry
I have seen many large turbine blades. They do have a "twist" in them to flatten out towards the tip. Because the tip speed is much faster at any rpm than the speed at the base. They also have a slight bend at the tip similar to the winglets on planes.
Thanks Rosie, great video. Is it always optimal to set pitch to the largest angle of attack that does not cause stall, or is there a middleground that is optimal in terms of power?
Is it possible for you to make video about “tubercles” design of leading edge and about winglets? Is it really that good? I saw some turbines that have some noise reduction wavy edge of blade etc.
Ooh yes, I plan to do some videos on biomimetics one day, and that will include tubercles. Spoiler alert: no commercial wind turbines have tubercles 😀 So far they are just an academic idea that gets reported a lot in the media... probably because whales are really cool. The noise reducing wavy edges are usually on the trailing edge, they're not tubercles. And some people say they were inspired by owls! Winglets is different, some manufacturers use them. They increase performance but also increase weight and manufacturing and transport efficiency, so it's not straightforward to say if it's worth it. Similar to their use on aeroplanes.
Thank you for sharing. I'm just learning about wind energy. Would it make sense to or can a bigger generator be used or are you eventually going to overload it, whatever size it is?
Thank you Rosie, and congratulations for your channel. I have a question about this topic: passive and active stall. It seems that stall always occurs in high winds, but, if this always happens, why using active stall in some big wind turbines? Graphs shows that passive stall is less efficient that active stall, but this justifies having a blade control for active stall? Thank you again
what is meant by Stall controll (Constant speed)? I'm working on report and confused this is variable speed or fixed speed? and how can i find Cp if the turbine Fixed speed?
You can either have drag pointing in the same direction as wind with a negative sign, or the opposite direction with a positive sign. It's the same thing, use your own preference.
@@EngineeringwithRosie Dear Ms Rosie, i've just worked for Wind turbine energy field, and my English is not good enough to understand your lession deeply, i hope i can make friend with you and learn from you more about this field as good as Renewable energy and learning English also. Thank you for your sharing, i love your channel.
Hi, thanks for your work! I am building a small wind turbine(3d printed) with fixed angle. I am now working on the regulator (to charge a battery). My questIon is: do I have to measure the wind speed in order to regulate the turbine rotation speed (to extract to good amount of power and having the tip speed ratio at the optimal point) or if I implement a maximum power point tracking algorithm it will find automatically?
@1:57 "for an aeroplane to climb the lift force needs to increase" is incorrect. Airplanes climb because of excess power, not excess lift. In a steady -state climb lift is equal to weight.
Hello! Im in an investigation group in Argentina. We are trying to develop a stall regulated system for a small turbine. Do you have or know any bibliography about it that could help me? Thank you very much
Hi Rosie, would it also be an option to have a second (or third!) generator running "dormantly" and then switching it on when the wind load gets too high? The electrical load would thus be doubled and act as brake. The incremental cost of the second generator doesn't seem like much compared to the total CAPEX of the wind turbine. It seems like a shame to "waste" the excess wind energy! I am sure you wind energy engineers have already thought about this! Best regards from Munich, Germany.
Thanks for the comment Oschi, you could do that (I think you would probably use a bigger generator rather than a second), and you are right that you would get more energy that way. I expect the reason they don't is that the cost of the larger generator (and it's not just the cost of the generator but other stuff like making the tower stronger, larger electrical cables) isn't worth it for the infrequent times you could get extra electricity. Turbine designers do spend a lot of effort carefully sizing every component to get the most cost effective turbine over its life.
@@EngineeringwithRosie Thanks for those insights Rosie. Perhaps you could also talk about breakout torque (minimum starting torque) to get the wind turbine moving. If permanent-magnet rotors and ironcore stators are used in the generator, this creates a cogging torque which mild breezes may not be able to overcome. Focussing on the generator and related topics would be of interest! Best, Oschi
Hi, good videos.... how many multipliers (for exm: a planetary gear) we could install in a vertical turbine??? could you subtitle to spanish please??? THANKS
The problem is cold weather. When the temperature in Texas drops to 32 degrees F (0 C), the vile electric grid has to be shut down entirely. No rolling power cuts, just completely cut off for days, ensuring that many beloved pets and some people die. Insane. Are wind turbines really so poorly designed that they really can't run in cold weather? Or are the people running the power grids so inept? The February freeze of 2021 is a huge argument against wind power. Propeller-powered airplanes routinely fly in -40 degree weather.
@@Bendigo1 Wrong! Stall regulation is categorized into 2 groups. Passive Stall and Active Stall. Can you tell me how active stall regulation works, for example?
I am a master's student in Wind Energy, and this is the best video I have seen ever talking about controlling wind turbines. Just Simple :)
Having worked in the wind industry since early 1980's (started in San Gorgonio Pass, Palm Springs, CA, USA) I have see all types, stall machines up to now pitch regulated. Good video.
I am no where near engineering - and found your explanation so easy to understand! Thank you! And I love how your pilot is female :) :)
Thanks so much! I am really glad you are feeling the love for engineering :-)
Thank you! I think I can watch this with my daughter and she will a) understand much of it b) see that she too could be an engineer.
Thank you so much!! I have spent the last few days banging my head against academic papers trying to understand this stuff for a project, finding your videos has been a godsend!
Great to hear! Thanks for the nice comment 😀
i'm an french energy engineering student and i've watched this video a couple of times to fully understant all of it! it's so well explained! thank you very much for your work and the time you spent making this (with subtitles)
i was watching it one more time and i realised you used she/her pronouns for the pilot and this made my day! we love representation! thank you for everything !!
Merci beaucoup! I used to get so sick of all the text book examples being male while I was studying. It made me feel excluded. So I like to start to balance it out a bit 😀
Engineering Student from Germany... This video is really great, keep that up.
Thank you very much!
Thank you very much!!
I am doing the paper this helps me a lot.
In Thailand, No one explains about stall and pitch.
Thank youuuuuu.
Glad it was helpful! I didn't realise when I made this video that so many people wanted to know about stall and pitch regulation... let me know if there are any other related topics you would like to see a video on 😀
Hello, I am a master student also in Energy Production, and I have to say that this video is very helpful. Bravo Rosie, and thank you! Keep up!
Great video! Was really helpful and informative. I loved the way you presented the topic along with a pleasant and smiling face. Looking forward to seeing a lot more of your positive and cheerful content. Thank you for making engineering easier.
Keep up the good work in explaining the basics workings in turbines.
Great video - it helped me to understand how wind turbines work.
That's great to hear!
. awesome simplicity in teaching the control of Wind turbine power
Very helpful video! I am a student studying Renewable energy, and this video helped me a lot to understand the control system. Thanks:)
Your videos are super awesome. I am part of a college team making a solar and wind powered robot to transport weight. Your mention of formulas allow a lot of personal research is super nice. Thanks! :)
Hey wow, a solar and wind powered robot?! That combines 3 of my favourite engineering topics 😍 If you would just add lasers then that would be pretty much my dream project!
Does the robot have batteries that are charged by the solar and wind, or are they actually mounted on the robot itself?
I would love to see photos! You could post them on my facebook page facebook.com/EngineeringwithRosie/ or tag me on instagram @engineeringwithrosie
@@EngineeringwithRosie I will be sure to post on your Facebook page in April. The robot is only allowed one rechargeable AAA battery. No additional other batteries allowed. The energy stored must be mechanical or electrical. So, we are using supercapacitors. The rules state that the solar and wind equipment must be mounted on the robot. While the robot is in the charging zone, the simulated light and wind will be a couple of inches away. Our estimates is that we will gather 10-40 watts of energy.
Thanks! it's a great contribution for those who like me are just getting into the wind turbine universe!
Very good explanation and very educational! thanks for your input! Greetings from Argentina! renewable energy student!🇦🇷
What a great way to explain it. You explained this so called complex topic just in 7 minutes!!!!!!!!! Ur simply great😃
Truly tech video- stalled vs pitch regulation. Very well explained.
Your videos are great for me. They are easy to understand, but full of details I'm interested in, but didn't have easy access to.
Thank you Rosie, I have finally understood what pitch the blade means!
Excellent video - really helps to have those sketchings/animations. Thank you so much.
Glad it was helpful!
Thank you for the clear explanation of such complicated terms with patience which makes it seems to be easy now for me. Appreciate your efforts 🙂
Thanks for this video! I'm doing a project on turbines, which I know nothing about and your videos and articles are my lifeline currently!
Great to hear! What are you studying?
Mechanical engineering :-D
My favourite kind of engineering 😊
Many thanks for the very straightforward explanation.
You are welcome!
Congratulations! I will use these short videos in my engineering classes in Brazil.
Crystal clear explanation, thank you for the good work!
Great video! You got a new fan from Brazil
Thanks!!! The explanation is exactly what I needed for my essay!!!
I'm so glad!
This was a great help to my HND in Electronics, thanks very much.
Thanks for the great content and thorough explanations, Much appreciated.
very simple and rich ... love it
Can you please go into detail about a pitch bearing. What is the typical size, diameter and length, materials (all stainless?), the cost, the weight, the vendors? Please show a diagram, engineering drawings, photos, and hold one up to the video camera at different angles. Thanks, Steve Hines
Thank you so much ! Very clear and helpful !
Amazing explanation, it was so easy to understand these concepts!
Why are the generators located at the hub rather than the base of the windmill? Wouldn't it be a better design to keep the high maintenance parts at the base? If you were to locate generation at the base, you could put two generators on the shaft and have one as a backup and also to take the excess loading in high winds.
Having the generator at the base adds complexity and cost. It would require a strong mechanism to transfer the motion of the rotor to the generator on the ground. Adding that mechanism would also decrease efficiency because of extra friction and parasitic losses.
Nice, easy and scientific!
Thank you! Cheers!
Thank you, very clear explanations
Are you familiar with the Hyland wind turbine? It uses shorting of the motor circuit to stall the turbine in high winds.
Rosie you rock!! Thank you for this video
Great Explanation. Thanks a lot!
Glad it was helpful!
Excellent
Thank you! Cheers!
Really Good explanation. Keep it up!
Thanks a lot!
Great explanation!!
Glad it was helpful!
I wonder whether the airfoil should be set to a fixed maximum Angle of Attack greater than the Critical Angle, and then use Leading Edge Slats (much smaller and maybe easier to implement) to power the flow around the blade. That way, the default condition is that the blade is nearly unpowered by the wind (but has large drag) until the slat is deployed.
What sort of technological advancement was necessary for the pitch bearings to become viable? More durable materials? Different manufacturing technique?
Thank you for this excellent video!
You're very welcome!
Hey Rosie. Lookin' good Love. Haven't watched the whole video yet, but dig it so far.
Propellers stall? Of course, but let's get into the nuts and bolts of why?
Thank you for such clear explanation. I was having difficulty understanding the difference between stall and pitch. Could you make another video on stall regulation using trailing edge flap?
Thanks for the comment, are you talking about trailing edge flaps on wind turbine blades? That is not something I have ever seen!
Excellent video, thank you so much.
Nice explanation! Found it very useful :)
Rasheed Kammiel
in structural analysis we are in love to analysis for different loading condition and in case we miss on loading condition we will be in big treble, can you sort these loading conditions in blade design
Thank you so much your video was major hlp 🙌
In a diy wind turbine I've seen, a special "tail-fin" was used to rotate the entire wind turbine so that it faced perpendicular to the wind. Is this something that is ever seen in commercial turbines?
Genial, gracias!
Is the lift vector perpendicular to the local wind vector or the wing chord?
Thank you!
You're welcome! Glad you enjoyed it 😀
nice explanation
Thank you! Are there any other related topics that you would like to see covered in a video?
@@EngineeringwithRosie yes pls can you talk about the best location for wind turbine
@@abdullahal-junaibi3656 sure! That is a good topic for a video, I will add it to my list. In the meantime, I mention it briefly in this video on Wind Turbine Design Evolution. Near the end I visit an offshore wind farm and talk about why that is a good location for a wind turbine: ua-cam.com/video/LJTcVEAojqw/v-deo.html
Hi Rosie, I am wondering about the direction of lift force relative to the turbine shaft. I thought that due to high tip speed, the direction of lift is more along the turbine shaft then perpendicular. Does it then have a significant contribution to generator torque?
Regards, Maarten
Hello Rosie, just wanted to confirm the blade direction; according to the zoomed bubble shown at 3.49min, is it the tail of the air foil which faces the wind ? Thanks
Does increasing the size of the turbine make it easier to allow the turbine keep generating power when it's very windy? Are some of these huge turbines that are now being produced able to take advantage of really high winds?
Isn't there also electronic regulation, by essentially shorting out the generator, which causes the generator (and attached blades) to stop turning?
Wow !! why didn't I see this video earlier...:( great explanation!
Glad it was helpful! And to answer your question, I am pretty new to UA-cam, it takes some time for my videos to get recommended over the bigger channels 😄
@@EngineeringwithRosie keep posting ! It was quality stuff. Simple yet very informative ✨
Great explanation power madam
How angle of attack can change in stall blade because it is fixed with hub right? and how tip brake used to put a brake in stall blade?
Great video
Thanks, I'm glad it was useful for you!
I live in Dayton OH Vandalia 45377. They don't allow vertical wind mills. But this are has an interchange 70/75 interstates, what I would like to know is how much energy we lose everyday by not having small scale wind turbines to collect roadside. especially where community walls are preplaced and I think this will produce weather the the vehical is gas desiel or EV. thanks
How much does the perfect pitch increase power output across different wind speeds?
It significantly extends the range of wind speeds that the turbine can operate close to rated power. I will dig up a couple of power curves for a pitch and stall regulated turbine and get back to you with some actual numbers. That could be a good topic for a video, actually... thanks for the suggestion 😀
Thanks a lot 🙂
you are better than my prof
Thanks! I probably don't have to teach as many topics as your prof, so go easy on her/ him !
excellent. What is the optimal stall angle? thank you for the great work!
Awesome, thank you
Thanks, and you're welcome!
What are the causes that can lead these adjustments to fail? I saw many videos about turbine accidents and I would like to know the possible causes for this.
Hi and thanks for the video. I learned a lot. Btw, it would be helpful if you may also talk about wind turbine aerodynamic brake. Thanks in advance.
Noted! Thanks.
Awesome video Rosie! Im keen to learn more about the additional braking mechanisms that modern wind farms use, in addition to pitch control. Ive heard that they also have mechanical disc brakes. If a wind farm is at full speed and needs to stop, is pitch control sufficient or is an additional method necessary?
Some modern wind turbines do not have remotely-controlled mechanical brakes, they simply use pitch control to slow the rotor and then feather the blades to minimise loads and "pinwheel".
You can always lock them in place, but often you need to be actually in the nacelle to do that. You need to be able to mechanically lock them so that they can't move around while maintenance workers are inside the blades.
It's surprising difficult to find information on this, thanks for the insights!
General good explanation. But I disagree that the blade is pushed up by the high pressure below AND pulled up by the low pressure on the top. 2:28. The low pressure presses the blade DOWN, but less so than the high pressure presses up. The differential pressure matters. It would have been more correct and simpler to just mention the high pressure below.
Fair point, I'll keep it in mind for next time!
Hello Rosie, I like all your video's,
Does a mechanically driven pitch control work just as well as an electrically or hydraulically driven pitch control?
I plan to buy a 10 KW wind turbine so I try to find out as much as possible in advance
Hi Rosie, thanks, another great video. Quick question - do modern day turbine blades use 'washout'. On gliders (wide wingspans, low flying speeds typically) the wings angle of attack flattens out towards each wingtip, thus reducing the likelihood of a tip stall in a turn. It seems to me that a turbine blade (bit like any old propeller) gets faster, relatively, the further out you go and so, in order to reduce induced drag, etc., it would make sense to flatten it off. Another thought, planes now have the little vertical fin at the ends of their wings in order to reduce efficiency losses due to the reconciliation of the two air flows - upper and lower - in that area, might be useful on turbine blades I wonder? Anyway, look forward to your thoughts. Jerry
I have seen many large turbine blades. They do have a "twist" in them to flatten out towards the tip. Because the tip speed is much faster at any rpm than the speed at the base. They also have a slight bend at the tip similar to the winglets on planes.
Thanks Rosie, great video. Is it always optimal to set pitch to the largest angle of attack that does not cause stall, or is there a middleground that is optimal in terms of power?
The optimal angle of attack is the angle of maximum lift to drag.
Is it possible for you to make video about “tubercles” design of leading edge and about winglets?
Is it really that good? I saw some turbines that have some noise reduction wavy edge of blade etc.
Ooh yes, I plan to do some videos on biomimetics one day, and that will include tubercles. Spoiler alert: no commercial wind turbines have tubercles 😀 So far they are just an academic idea that gets reported a lot in the media... probably because whales are really cool. The noise reducing wavy edges are usually on the trailing edge, they're not tubercles. And some people say they were inspired by owls!
Winglets is different, some manufacturers use them. They increase performance but also increase weight and manufacturing and transport efficiency, so it's not straightforward to say if it's worth it. Similar to their use on aeroplanes.
@@EngineeringwithRosie can’t wait:)
Thank you for sharing. I'm just learning about wind energy. Would it make sense to or can a bigger generator be used or are you eventually going to overload it, whatever size it is?
Thank you Rosie, and congratulations for your channel.
I have a question about this topic: passive and active stall. It seems that stall always occurs in high winds, but, if this always happens, why using active stall in some big wind turbines? Graphs shows that passive stall is less efficient that active stall, but this justifies having a blade control for active stall? Thank you again
what is meant by Stall controll (Constant speed)? I'm working on report and confused this is variable speed or fixed speed? and how can i find Cp if the turbine Fixed speed?
Drag force is opposite the direction of the wind or together wind's direction ? in your picture they r same direction ??
You can either have drag pointing in the same direction as wind with a negative sign, or the opposite direction with a positive sign. It's the same thing, use your own preference.
@@EngineeringwithRosie Dear Ms Rosie, i've just worked for Wind turbine energy field, and my English is not good enough to understand your lession deeply, i hope i can make friend with you and learn from you more about this field as good as Renewable energy and learning English also. Thank you for your sharing, i love your channel.
Hi, thanks for your work!
I am building a small wind turbine(3d printed) with fixed angle. I am now working on the regulator (to charge a battery). My questIon is: do I have to measure the wind speed in order to regulate the turbine rotation speed (to extract to good amount of power and having the tip speed ratio at the optimal point) or if I implement a maximum power point tracking algorithm it will find automatically?
You are awesome. Keep it up
Thanks! That's very nice of you 😊
@1:57 "for an aeroplane to climb the lift force needs to increase" is incorrect. Airplanes climb because of excess power, not excess lift. In a steady -state climb lift is equal to weight.
Correction: in a climb lift is greater than the weight. In level flight, lift is equal to the weight.
Hello! Im in an investigation group in Argentina. We are trying to develop a stall regulated system for a small turbine. Do you have or know any bibliography about it that could help me? Thank you very much
Hi Rosie, would it also be an option to have a second (or third!) generator running "dormantly" and then switching it on when the wind load gets too high? The electrical load would thus be doubled and act as brake. The incremental cost of the second generator doesn't seem like much compared to the total CAPEX of the wind turbine. It seems like a shame to "waste" the excess wind energy! I am sure you wind energy engineers have already thought about this! Best regards from Munich, Germany.
Thanks for the comment Oschi, you could do that (I think you would probably use a bigger generator rather than a second), and you are right that you would get more energy that way. I expect the reason they don't is that the cost of the larger generator (and it's not just the cost of the generator but other stuff like making the tower stronger, larger electrical cables) isn't worth it for the infrequent times you could get extra electricity. Turbine designers do spend a lot of effort carefully sizing every component to get the most cost effective turbine over its life.
@@EngineeringwithRosie Thanks for those insights Rosie. Perhaps you could also talk about breakout torque (minimum starting torque) to get the wind turbine moving. If permanent-magnet rotors and ironcore stators are used in the generator, this creates a cogging torque which mild breezes may not be able to overcome. Focussing on the generator and related topics would be of interest! Best, Oschi
Dear Rosie, how is thé complex
Hi, good videos.... how many multipliers (for exm: a planetary gear) we could install in a vertical turbine??? could you subtitle to spanish please??? THANKS
The problem is cold weather. When the temperature in Texas drops to 32 degrees F (0 C), the vile electric grid has to be shut down entirely. No rolling power cuts, just completely cut off for days, ensuring that many beloved pets and some people die. Insane. Are wind turbines really so poorly designed that they really can't run in cold weather? Or are the people running the power grids so inept? The February freeze of 2021 is a huge argument against wind power. Propeller-powered airplanes routinely fly in -40 degree weather.
I didn't get that....this means for stall regulations the blades need not to be mounted on bearings at the hub?🤔
Correct. They are fixed at an angle that will cause the blades to stall when the wind reaches a certain speed.
@@Bendigo1 Wrong! Stall regulation is categorized into 2 groups. Passive Stall and Active Stall. Can you tell me how active stall regulation works, for example?
great
Thanks!
💎
Many building build from bodom up
First you build top section and Jack up and build next level
Then jack again
Any pilot could explain this far more clearly. It’s so obvious
Not to mention that u have a gr8 smile 🤩
Are you a wind turbine Engineer??
Yes, I have worked in the wind industry for about 9 years.
if the pilot is female............. how can not we understand smth............loved this change and the explanation. thansk