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Does small wind energy or backyard wind turbines make sense? Why do we see so much rooftop solar, but so little rooftop wind?

Bookmarks
00:00 Intro – Rooftop solar’s domination in the urban renewables sector
00:38 Why don’t we see more rooftop wind turbines?
01:38 Quality of solar resources – Solar irradiation in different places around the world
02:40 Quality of wind resources – Urban wind effects, wind shear effects, available power in wind
04:53 Available wind power in Kolding vs Canberra
05:40 Other points of comparison – Benefits gained from a rural location, noise and vibration issues, maintenance required
07:47 Applications for urban wind technologies – Off-grid properties, high-wind speed locations, rural farms, non-utility and aesthetic purposes, backyard engineering or DIY
09:54 Outro
10:11 Thanks to Brilliant for sponsoring this video!

In this video I’ll take you through the science and engineering reasons why rooftop solar is much easier than small wind, and show that the same wind turbine on a roof is likely to generate *less than 10%* of the energy a turbine of the same size would generate in a nearby wind farm.

And, because I know most of you found this video because you already know you want to do a DIY wind energy project (they’re fun!) or have an off-grid project that needs wind energy to diversify your energy, I have included some resources (Hugh Piggott’s great books on DIY wind energy and certified small wind turbines if you want to buy one).

Thanks to Brilliant for sponsoring this video! They are offering 20% annual subscriptions for the first 200 viewers to sign up at https://Brilliant.org/EngineeringwithRosie

Resources:
Firstlinks – Eraring Power Station
https://www.firstlinks.com.au/eraring-power-station-closure
OpenNEM
https://opennem.org.au
Weather and Climate – Monthly Sunhours
https://weather-and-climate.com
Global Solar Atlas
https://globalsolaratlas.info
Global Wind Atlas
https://globalwindatlas.info
My video on the gingerbread wind turbine projec

Micallef and Brussel, 2018 – Urban Wind
DOI: 10.3390/en11092204
Salazar et al, 2016 – Wind Shear
DOI: 10.3390/s17010008

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This video was sponsored by Brilliant.

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The future of wind energy is solarpunk. At least according to some manufacturers who want to put wind turbines on kites, blimps, or just generally up in the air where wind can generate green energy and fight climate change more efficiently.

Hosted by: Savannah Geary
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Sources:
https://doi.org/10.1146/annurev-control-042820-124658
https://www.nrel.gov/docs/fy21osti/79992.pdf

The promise and challenges of airborne wind energy

https://e360.yale.edu/features/after-a-shaky-start-airborne-wind-energy-is-slowly-taking-off
https://www.energy.gov/eere/articles/wind-turbines-bigger-better
https://www.euronews.com/green/2021/11/04/turning-traffic-into-clean-energy-how-this-startup-plans-to-power-the-streets-of-istanbul
https://www.sierraclub.org/michigan/wind-turbines-and-birds-and-bats
https://www.bbc.com/future/article/20200302-how-do-wind-farms-affect-bats-birds-and-other-wildlife
https://www.audubon.org/news/wind-power-and-birds

IMAGES

https://www.gettyimages.com
https://commons.wikimedia.org/wiki/File:Highway_wind_turbine.gif
https://en.wikipedia.org/wiki/File:Kiwee_One.jpg
https://en.wikipedia.org/wiki/File:Principle_of_kite_energy.png
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References
A great deal of information in this video was found through phone interviews with Simec Atlantis engineers
[1] 4,170 TW is annual US energy production (table 1.1 here) – US wave power potential is ~2000TW, according to this 2011 DOE report
[2] https://www.iea.org/topics/renewables/ocean/
[3] https://www.youtube.com/watch?v=pwChk4S99i4
[4] Figure 9.6 and 9.7 on page 82 https://tethys.pnnl.gov/sites/default/files/publications/MeyGen-2012-ES.pdf
[5] https://tethys.pnnl.gov/sites/default/files/publications/La_Rance_Tidal_Power_Plant_40_year_operation_feedback.pdf
[6] https://tethys.pnnl.gov/annex-iv-sites/sihwa-tidal-power-plant
[7] Page 19 https://tethys.pnnl.gov/sites/default/files/publications/La_Rance_Tidal_Power_Plant_40_year_operation_feedback.pdf
[8] https://tethys.pnnl.gov/sites/default/files/publications/Final_EMP_report_SeaGen.pdf
[9] https://www.power-technology.com/projects/strangford-lough/
[10] http://icomps.co.uk/seagen-decommissioned-after-successfully-delivering-11-6gwh-to-the-national-grid/
[11] https://www.seai.ie/publications/Renewable-Energy-in-Ireland-2019.pdf
[12] Page 14 https://www.climatexchange.org.uk/media/3100/state-of-the-wave-and-tidal-industry-report.pdf
[13] https://www.bt-projects.com/wp-content/uploads/documents-public/Environment/RHK-2011-SeaGen-Environmental-Monitoring-Programme.pdf
[14] http://www.renewableenergyfocus.com/view/13491/meygen-to-develop-400-mw-uk-tidal-power-site/
[15] https://vimeo.com/237566185
[16] Figure 11.2 and 11.3 page 114 https://tethys.pnnl.gov/sites/default/files/publications/MeyGen-2012-ES.pdf
[17] Page 154 https://tethys.pnnl.gov/sites/default/files/publications/MeyGen-2012-ES.pdf
[18] Page 43 https://tethys.pnnl.gov/sites/default/files/publications/Final_EMP_report_SeaGen.pdf
[19] Page 39 https://tethys.pnnl.gov/sites/default/files/publications/Final_EMP_report_SeaGen.pdf
[20] Page 17 https://tethys.pnnl.gov/sites/default/files/publications/MeyGen-2012-ES.pd
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How Do Wind Turbines Work? | Sources Of Electric Energy | Electricity | Wind Turbines Explained | Wind Mill | Wind Mill History | Wind Turbines Structure | Electric Energy | Wind Energy | Wind Generated Electricity | Wind Turbines Video For Kids | Video For Kids | Science Videos | Best Kids Show | Dr Binocs Show | Peekaboo Kidz

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These are micro hydroelectric converter from flowing water.ranging from 10 – 20 watts and 0 – 22 volts ac.Useful for remote off grid rural areas as well as in camping. It is enough to light domestic led bulbs/tubes, charge mobiles, charge a 12 volt 4 Ah battery etc..
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See how wind turbines generate clean electricity from the power of the wind. Highlighted are the various parts and mechanisms of a modern wind turbine.
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From time to time, wind turbines can fail. Faulty equipment or extreme weather is often the cause of these failures. Today we’re taking a look at wind turbine failure events.

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Topics Covered:
• Wind energy
• Uses of wind energy
• How is wind energy used to produce electricity ?
• What is a wind turbine ?
• What are horizontal axis wind turbines ?
• What are vertical axis wind turbines ?
• What is a wind farm ?
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References:
[1] https://www.statista.com/statistics/268363/installed-wind-power-capacity-worldwide/
[2] https://www.reuters.com/article/us-climate-change-denmark-windpower/denmark-sources-record-47-of-power-from-wind-in-2019-idUSKBN1Z10KE
[3] https://www.theguardian.com/environment/2015/jul/10/denmark-wind-windfarm-power-exceed-electricity-demand
[4] https://renewablesnow.com/news/wind-produces-325-of-irelands-power-in-2019-689351/
[5] https://www.ge.com/renewableenergy/wind-energy/offshore-wind/haliade-x-offshore-turbine#:~:text=The%20Haliade%2DX%20offshore%20turbine,seven%20points%20above%20industry%20standard.
[6] https://www.compositesworld.com/articles/wind-blades-progress-and-challenges
[7] https://www.lmwindpower.com/
[8] https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012087/pdf#:~:text=Introduction%20The%20maximum%20rotational%20speed,of%20the%20blades%20%5B1%5D.
[9] https://www.sciencedirect.com/science/article/abs/pii/S1471084605003264
[10] https://share-ng.sandia.gov/news/resources/news_releases/big_blades/ https://www.sciencedirect.com/science/article/pii/S2405896317307218

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