my holiday house is off grid, it runs quite successfully on 1600watts of solar panel, we also added a 300watt wind turbine to harvest energy from the sea breeze, which also is a regular occurrence at night, I bought a replacement turbine from china, then had a stroke, I got over that really well and installed the replacement turbine. it was single phase instead of 3vphase and I changed the wiring to suit, but feeling a little bit slow mentally I forgot to put the meter over the output, the internally regulated turbine wasn't internally regulated and it cooked our 15kwh battery bank (bummer) battery bank now replaced I am going to use the wind output to heat our solar hot water tank. we found that the small turbine added useful amounts of power and in winter it was really nice to see the batteries fully charged first thing in the morning, also the sound of the wind turbine whooshing away was reassuring. ps, I mounted the turbine on a tube mast made up of two pipes, with the thinner one inside the other, silicone turbo tubing in between. these were clamped the the upstairs corner of the house by pipe clamps and MG B engine mounts. a boat winch winds the taser down to access the turbine, and back up to be in service.

@EngineeringwithRosie

Жыл бұрын

Sounds like a cool setup you've got! Thanks for sharing your experiences including your struggles 😀

@tonywilson4713

Жыл бұрын

You've actually described something I wished a lot more people would consider. I have lived in Fremantle WA and Aspendale Victoria both located right next tot he water and BOTH get a seas breeze that's as regular as a clock. It might vary in strength but you can't prevent the basic physics of what happens due to the temperature differential between the land the the water. ANYBODY with a solar system in that sort of location has an inverter system sitting there with LITTLE or NOTHING coming in as the sun goes down. All you need at that point is a *SUITABLE* wind turbine with an output compatible with the solar inverter. There is a company in Iceland that has done this but they are horribly expensive but then they are built for Icelandic conditions. I actually think there is a small market for low cost VERTICAL wind turbines. They are cheap, they are simple and they are quiet if they have decent bearings. The biggest issue with small HORIZONTAL turbines is the noise they make. One of the small Scottish Islands has a couple of small HAWTS and they generate more power than the Island needs. They are as loud as hell but they are way out town. In built up areas like Fremantle an Aspendale you can't have them. It will only take 1 neighbor to complain and out they go. Against it is the misconception of efficiency. People see the lower efficiency of VAWTs and immediately dump them as no good. But if you've already paid for the solar inverter and its only working 8-12 hours a day depending on the time of year and you can extend that to around 20 hours a day (and possibly 24 at times) then you are raising the overall system tremendously. The fact you have done this and proven that in a decent location IT WORKS is music to my ears.

@tonywilson4713

Жыл бұрын

@@EngineeringwithRosie FYI - the reason I like this comment is that I have been working on a variation of the VAWT with a better aerofoil and electronics compatible with solar panels. I started with a degree in aerospace so I have a pretty good understanding of the issue of a wing profile that is effectively go through extreme swings in angle of attack. That's just one of the major issue of VAWTs that only a few have tried to deal with. I know the detractors arguments as well but most of them are ignorant non-engineering people who don't accept the concept that a technology that's good for 90% can also be hopeless for the other 10% and vice versa. HAWTS (small, medium , large or giant) will always out perform VAWTS but they are just out of the question in around housing BECAUSE OF THE NOISE. Now look at a strip like the strip from Port Melbourne, through St. Kilda, down to Mordialloc and all the way to Frankston. Nos consider how many MEGAWATTS of solar inverters are already installed and doing NOTHING from late afternoon through to early morning.

@tonywilson4713

Жыл бұрын

@@EngineeringwithRosie And here is the real thing to consider Rosie. We are due to shutdown at least 5 of our GIGAWATT class power stations before 2030. So you know I define a GIGAWATT class power station to be one that has a nameplate rating of greater than 1,000Mega Watts or more and supplies *BASE LOAD POWER.* And there is a giant problem around the world that's about to come hammering in on developed nations. We all built big base load power stations starting after WW2 and then continuing through the 50s & 60s, but by the 1970s with the population rapidly expanding they all became Gigawatt Class power stations. Some are huge like the one in Toronto at over 6 GW. But if you ga and look at the lists of power stations available in places like Wikipedia (it one of the easiest sources) you find something really odd. Despite population growth the entire developed world just stopped building them. California has only built 1 since 1990. We haven't built 1 since the late 90s and the French haven't built 1 since the mid 1990s. Other than a few exceptions like Hinkley Point C in Britain and c couple in America NOBODY in the West has built any new major power station in over 20 years. China and India are exceptions but they are developing rather than developed nations. The reason is simple, we all got conned by the economics clowns who told us to privatise everything. If you just paid several billion for an asset you need it to make money and preferably as much as possible. Its even better if you can raise the prices of what you produce, but that's not so easy because there are regulations. But there is an easy way around that. Don't build anything new and PREVENT (through lobbying) anyone from building anything new except smaller power stations that you can also buy into. As the population increases demand increases and basic supply demand economics drive the price UP while your costs remain almost stationary. Its super bonus time for 20+ years and it only gets better and better. So here we are 25+ years later with a bunch of rapidly ageing power stations and almost no way to replace them before they fail or shutdown through age. So to simply keep our society going we will need every last kW of generating capacity we have producing at its best. Fun times ahead.

You showed an example of building integrated wind turbine in London, U.K. at a building called Strata in SE1 . I have lived near to that building since it was constructed. I have seen the wind turbines there operate once. There is apparently a structural and vibration issue when the turbines turn, frankly it looks as though the developers were indulging in a bit of greenwashing. It would have been more effective to use the money spent on those turbines to insulate the flats ( apartments) to a higher standard.

@EngineeringwithRosie

Жыл бұрын

Oh dear! Yes I think that's always the case for these architectural green buildings. Shame they didn't check about vibrations/ resonance. At least they probably still look cool while they're stationary. But probably not inspiring anyone to go green of they never work.

@Robert-cu9bm

Жыл бұрын

The owners will be wanting to put up with the vibrations come next year if it helps keeps the energy bill down.

@peterjones6640

Жыл бұрын

@@Robert-cu9bm Hi, I think the vibrations actually have a detrimental effect on the structure, not just an annoyance.

@johnfellows689

Жыл бұрын

While in not disagreeing with your ,better the money spent I can tell you solar an wind together work hand in hand. But you need to understand what type of turbine is required in a particular situation,. Solar alone does not return a good steady output. Wind fills in the gap!

@johnfellows689

Жыл бұрын

@@Robert-cu9bm these so called imbalance issues are unacceptable and it's simply lazy installation,. Wind or solar are not viable alone,you must have both,. The combination is 25% more efficient,.

Another reason to go for wind instead of solar is... when there's NO SUN ! I plan to spend 1 year in the artic circle above Lofoten and I want to be off grid during winter. And at this latitude in winter, the sun shines only few hours a day and very low, generating very little power. I plan to install a 1.3m turbine over a 10m pole facing the shore.

Excellent explanation, but one point you missed: Here in the UK, we have to take into account that solar panels produce almost nothing in December when the sun is below the horizon for most of the time and the panels will be in shadow for most of the rest of the time, which is the time of year when we use most power, wind on the other hand produces power all year round, with the most power in the winter when we use most power. Looking at the UK grid, we generated an average of 5.7GW of solar in the last summer solstice week but only 0.12GW in the last winter solstice week.

@EngineeringwithRosie

Жыл бұрын

Thanks, and I think I did cover both those points. The solar irradiation in kWh/m^2 is the annual average and takes into account seasonal differences and cloud cover. And you're absolutely right, when season variations are important, wind is great for diversity. Does it need to be urban wind though? If say only if you can't connect to the (wind farm-powered) grid.

@nigels.6051

Жыл бұрын

@@EngineeringwithRosie Are you only interested in annual averages? We don't currently have off grid batteries that can smooth power consumption over a year. Our winter solstice week average solar power generation, based on the UK grid figures for the last solstices, was just 2% of our summer solstice week average solar production, so if I only have batteries that can smooth weekly power consumption rather than annual, then to have enough solar power in winter I need to install 50x the amount of solar panels that I need for the summer, and then in the summer all but 1 of those 50 is not required! This does not make great economic sense! If I have a grid connection then the cheapest source of power is the offshore wind turbines, urban generation isn't anywhere close to competing, or that would be the case if the Europeans weren't currently buying so much power from the UK grid that our grid prices have gone through the roof! Last Sunday, the UK was exporting as much electricity as was being generated from renewable sources!

@alanhat5252

Жыл бұрын

@@EngineeringwithRosie sorry Rosie, on first viewing the seasonal slump in solar does not come across at all clearly in the video & in the UK it is a major problem. My campervan has a 220W solar panel bolted flat on the roof & through January & often February it doesn't generate enough to cover system losses, I've come back to the 'van in Spring several times only to discover I need to buy a new battery bank.

@stuartburns8657

4 ай бұрын

​@@alanhat5252It's not a major problem is a known situation. 220w panel us on the low side these days, but even with a more modern 400w you'd struggle. On the east coast in the UK, with our 6000w PV (and kwH battery) only produced 113kwh's in December. You anticipate that and go on a time of day tarrif, so I top the battery up at night (72p) and between the modest PV generation plus battery power, manage all day (family of 4) Looking at 5-6 years ROI, but I honestly feel it's a national scandal that panels and batteries are not on every house.

Where wind is the biggest asset here, is during those days, and WEEKS of cold snowy weather when there isn't much sun, but there IS a lot of wind. Wind is very much dependent on location. I live in the states out on the plains, on top of a hill, and the wind is ALWAYS blowing, except for perhaps during a few dog days in July, so Wind has made a pretty big impact, and greatly reduces the number of solar panels necessary to keep the batteries fully charged without using the generator or grid.

Really thorough and interesting video Rosie! You nailed every point and it was nice to see that it's not just another video either say small wind sucks or is the best thing ever! I think this video is up there with your turbine waste video for a great use of napkin calculations as well. Keep up the great work!

I was thinking, right now in some places utilities will offer electricity credits to people who buy shares in community solar projects and sell that power to the grid. In principle, the same could be done with wind. If we could band together and come up with the capital to pay the utility to install and maintain one extra large wind turbine in a good location, a sort of "community wind project", and if they would offer us credits for the extra electricity it produces, that could end up being way more cost-effective than small local wind production.

Thank you for your videos. The time and effort you put in is greatly appreciated.

@EngineeringwithRosie

Жыл бұрын

Aww, thank you! You're welcome 😀

One addition for where small wind turbines absolutelly makes sense is for power generation on sailing vessels.

I worked at an early backyard windpower company once upon a time, Southwest Windpower, and while they initially sold a 10m tower, they quickly moved away from that to 15m, 18m and 20m towers. The issues were usually permitting and access, although the Skystream was designed for 10 year operator without maintenance of any kind.

@georgeadams1955

Жыл бұрын

The Whisper was very popular in South Africa.

Thank you for supporting our drive to think and think and think.

My friend was well into his 60s if not 70s when he brought his solar and water heating panels for his house and up until his death he loved them and said it was the best thing he did

@EngineeringwithRosie

Жыл бұрын

That's a lovely story, thanks 🙂

Hi Rosi A further possible advantage of wind energy is that it is many times produced at (or after) sunset, which could mean a saving on battery capacity.

@thelightninghunter23

9 ай бұрын

That also depends on scale. What happens is that solar heating of the ground induces vertical mixing due to convection. This is why there's almost always a breeze on sunny days. At night, mixing stops, so the wind goes calm at the surface and actually increases above 100m above the ground A small turbine on a home will produce much less output at night whereas grid-scale systems will actually produce more power. Of course this is somewhat influenced by geography.

I always fancied a wind turbine on my roof because I live in a fairly windy place, but when I looked at the actual size of even a "tiny" wind turbine and how little energy it would produce...I quickly that it was never going to work...🤷‍♂️

@donmacquarrie9161

Жыл бұрын

this will.... kzread.info/dash/bejne/na2ZmKN_mrzHqag.html

@kahlernygard809

Жыл бұрын

Check out turbine guy on KZread he has one on his roof been there for years

@donmacquarrie9161

Жыл бұрын

@@kahlernygard809 that is a savonius/darius type....my design is quite different and far more powerful

@kahlernygard809

Жыл бұрын

@@donmacquarrie9161 I doubt it, you have no subs meanwhile turbine guy has 4 mil vies and 11k subs

@donmacquarrie9161

Жыл бұрын

@@kahlernygard809 I don't doubt it....I know

Thanks Rosie, great channel with clear data driven approach.

Speaking as a rooftop installer, I'm just reeling from those roofers at 2:00

Good video. Relevant information, well articulated and clearly presented. Learnt quite a few things about what considerations go into these systems. Thanks

Seems like having a wind turbine and solar panels would work really well

Another great video, Rosie! I live in the southern California desert. We get a LOT of sun, and a good bit of wind. My neighbor has a 400 Watt wind turbine, but it is only rated for a 12 Volt system, so doesn't do much good on his 48 Volt system, so he is using it on a secondary 12 Volt system. It is still not enough to keep that system strong enough to run his air conditioners, as the wind generator needs at least 7 mph winds to even start up. We both have plenty of room to put in solar arrays, and we have found that for less money, we can get more solar panels to produce the power we need. This, of course, is not true everywhere, but here it makes total sense.

Awesome video! Really really valuable information and very well and simple explained. Great work!

Thank you for book recommendations! I was thinking about experimenting with some small wind turbines. Great content as always!

Very Informative Video!!! Great Work!!!

My brother is building a new house in Queensland and will be including solar I will be very interested in how his performs against mine back in Devon in the UK. We do get meaningful power for 9 months of the year and living in a rural area area I had considered a small turbine. I became aware of the energy potential of small v large turbines and have instead subscribed to a more cooperative venture of wind turbines being constructed in Scotland by Ripple Energy.

@nigels.6051

Жыл бұрын

The bigger the wind turbine the better the investment, which tends to mean that the best investment deals, currently on ~16MW floating wind turbines, can only be afforded by the biggest pension funds! It will be interesting to see how the smaller onshore wind farms are doing in 30 years time when we have more than enough offshore wind at prices so low that the onshore farms probably become uneconomic to replace turbines. Assuming that we ever have enough energy, which seems unlikely, you can always make use of cheap energy!

@stuartburns8657

4 ай бұрын

Didn't that Ripple scheme turn out to be essentially a scam, with poor if ROI?

When I lived in Iqaluit there were a few people in town with rooftop wind turbines. It's quite windy since there's no trees, and the days are *very* short in winter (4 hours of day, plus another 3 hours of dawn/twilight). Of course in summer, days are very long (20 hours of day plus 4 hours of dawn/twilight). I don't know how far they've moved in the past 3 years but there's a possibility that they could turn off the diesel plant all summer long if they put up enough solar and a bit of batteries. They're also talking endlessly about putting up utility-scale wind turbines.

Visit brilliant.org/EngineeringwithRosie/ to get started learning STEM for free, and the first 200 people will get 20% off their annual premium subscription.

I am in north Manchester UK and my SOLAR ENERGY SYSTEM and battery storage is doing awesome stuff for me. No I don't get Aussie numbers. But I reckon for a 4.9kW system with two slopes one south and one north-west hitting Summer days of 22kWh in a place as far north as Manchester (we are on the same Earthly parallel as Canada's Edmonton, Alberta) is damn good going.

While solar works in the daytime, wind could work all night , when consumption is lower, and wind might help to make batteries last longer. Works on yacht wind generators.

Thank you for a good instructional video for people like me who do not have an engineering background.

This is a very helpful video!!

Thanks Rosie, Agree your comments, not a good idea to attach a wind turbine to a house as vibrations will find their way into the building. My off grid house is near that wind farm you showed east of Canberra. It has 3.6KW of solar and 1.1 KW wind turbine on a 15m mast. The wind is particularly helpful at night and in overcast weather. The device itself is a Bergey XL1. It has been operating for fifteen years. It is super reliable, smooth running and needs very little maintenance. Overall it produces about one fifth of our electrical power. We dont need or use a backup generator.

I always enjoy these video's. Thank you

Thanks Rosie 👍

Thank you for posting this interesting informative video

I'd add another reason why urban wind turbines are not a great option: the cost of the installation of photovoltaic panels is directly proportional to capacity and the size, you simply add more panels and size the power electronics accordingly. But big wind turbines are more cost effective ($/kW or $/m^2 swept) than small ones, that's why we are always trying to make them bigger.

I'm very happy with my 2000 watt pmg from Missouri wind and solar this with my 4 365 solar panels run all electrical needs in my home and yes, my turbine is 10 meters high.

Thanks!

thanks for this video, exactly what i was thinking about today

@EngineeringwithRosie

Жыл бұрын

Great timing then!

The available literature on onshore wind energy and turbines has improved.

I like the "cool" buildings better than the usual blocks. Also your cool presentations! And my small solar installation.

@EngineeringwithRosie

Жыл бұрын

Yeah I don't want to live amongst concrete rectangles 🙂

My biggest problem with domestic solar is that it's production is out of phase with both my daily and seasonal usage patterns. While this might not be a problem for some, where I live, I cannot sell the electricity back to the grid when I'm producing more than my own consumption, and when I really need more electricity ie during winter, early mornings, evenings or at night, I can't produce much (if any) from solar. A large battery might solve the daily cycle storage needs (for part of the year), but not the winter peak usage and introduces a whole raft of ethical questions about the production of large lithium-ion batteries. Also, as I neither work from home or have air conditioning, my summer electrical usage during peak sunlight hours is very low. I can understand an office building that both has air con and people there during the heat of the day (for the few weeks in summer when it's too hot), but the case for residential solar here is rather lacking. It would be much more effective for my road to pool their money and invest in our own medium size wind turbine as it's consistently windy, especially over winter and then maintainace would only need to be done once and the cost split between 50 houses (or my village could invest in a few of them).

Living in a unit which only receives max 2 hours of sunshine in at winter solstice and was looking at a wind turbine with 1 metre diameter blades, thinking to install on balcony. Just to charge a 12 volt battery, not trying to power the house. This video has convinced me to do more research before spending $. Thanks. It would be nice to have a link in the description of this video to the list of certified small wind generators that you mentioned.

Thanks, very clear

In denmark where i live, you can only have a urban windturbine if you live in the country side and it would make alot of sence to get one . But the price of a wind turbine that is goverment approved cost betwine 65.000$ and 135.000$ . That is alot of money when you can get solarpanel for your house 15.000$ to 18.000$ .

This is awesome.

Cool vid. Obviously a very niche application, but it's a good example of how mildly creative thinking and what is increasingly off the shelf renewable tech can save a companies a decent chunk of change.

Wind turbines are more suitable to large scale utility installation unless you are off grid and need to generate at night. Solar works for both individuals and utilities. Individual solar also assists the grid distribution.

Interesting consideration. I was very VERY surprised to see an Aussie so well wrapped up - in Australia!!

One thing I noticed is that many NYC buildings have "gaps" in the middle of them, mainly for regulatory shenanigans. It would be interesting if they put wind turbines in there, so they would at least be useful.

3:33 Wind closer to the ground gets slowed by the _ground._ Even on perfectly flat ground -- without buildings, trees, and hills and stuff -- the wind speed vs altitude plot looks the same.

Good video, thank you. One questions that i've had (and seen online) is the efficiency of a wind turbine to just heat water in an accumulation tank for a radiatorsystem. Since most of the electricity cost here in sweden goes to heating and there is not much solar during winter. That would also reduce the need for a constant output, since the water will be used as heating storage.

@paulbrouyere1735

Жыл бұрын

Exactly, we don’t need loads of electricity for some lights, and electronics like charging your phone or laptop. One should also realize 60 % of electric energy is lost in the grid.

You're still at the mercy of sunshine and wind; both of which have inconsistency in their availability. Dark days and no wind is very inconvenient to depend upon for electricity. I've designed and built a series of computer monitored wind gennys charging a 500 AH battery pack. The final version was a 2.9 kw which followed its predecessors in maintenance problems and lack of stable wind. Electronic Design Specialist and Mech Eng., I'm done with both solar and wind. Too much trouble but, I do have a 1 amp solar battery charger on my petrol lawn mower! :')

What I'm missing are ridge wind turbines, that use sloped roofs to increase the amount of wind moving through the turbine. Like ridgeblade. Still not as great as full sized mills, but better than smaller ones AFAIK.

Hello there, I live on the West coast of Denmark 🇩🇰 and the wind here can be pretty harsh sometimes 😄 I am thinking about installing a windmill, but I would prefer a combination of wind and solar power, in order to be totally independent of the grid.

Have you ever visited Folkecenter for Renewable Energy in Denmark, Hurup Thy, Yutland? It’s a magical place where wind, solar, wave and other sorts of renewable energy solutions are practiced, studied, developed and educated. If you ever have the chance to visit, do. It’s like a whole other world.

Love the straight forward approach - with actual numbers!!! I'm looking into wind power and looking for guidance if anyone can point in the right direction. so, to go through Rosie's check list - I live off grid, I'm out in the sticks, I have several hilltop on my property which are c200m above the sea level. The sea is 1.5km away and is visible right down the valley, so I get all the off-shore wind all the time. I am looking to supplement a solar system. The proposition to test is that I would be better of have wind power than more batteries so if we get several consiquitive days with no sun, chances are it will be stormy so I can generate power from the wind. same for overnight, where the only real demand is refrigeration for food so I need maybe 100 watts per hour to fill in the gap and reduce the drain on the battery - so a small wind turbine will not be far off the ground - with all the structural issues of building a large tower and the power it needs to generate is relatively low. Anyone with ideas for a commercial avaible system that can do that or better, ideas on how to build one myself, I would love to hear. thanks

It's the actual side by side comparative analysis with actual figures for me 👍🏾

@EngineeringwithRosie

Жыл бұрын

Thanks for the feedback! Very simple calculations can sometimes make a strong point 🙂

Hi Rosie! good lesson in solar, Lac Seul First Nations, Northwestern Ontario, Canada. Solar PV, Wind Turbine, and thinking of water turbine (In Water Line). the water turbine I hope it is feasible, but we'll see... Praying it will be. based on homes.

Good explanation and visual graphs, easily understandable without excess jargon! But got to admit, calling Germany northern Europe had me grinning here in Finland 🙂

HAVE BOTH 👍

THEY DID SOME WORK YEARS AGO IN A ROOFTOP WIND TURBINE THAT SAT IN A VERTICAL TUBE AND LET THE DISRUPTED FLOW ACROSS THE ROOF FUNNEL THE WIND TO THE TUBE AND THROUGH THIS STATIC VERTICAL AXEL TURBINE

Great explination, ive been thinking about ways to utilize wind energy for my own urban environment because i live in canada and winter makes solar difficult. I do strongly think that if we can get the cost and footprint of wind turnines down, perhaps through DIY systems and virtical access turbines, it would still be worth it to install on a smaller scale/in urban environments.

Even though Scandinavia is considered a "dark" place we do benefit from longer summer days than compared to those closer to the equator.

@nigels.6051

Жыл бұрын

On average, you actually have more hours of daylight, plus you have more days of summer and less days of winter than Australia and the rest of the southern hemisphere! In fact, if you adjust the angle of your panels to match the lower sun angle then Rosie's figures for Kwh/m² are wrong, I believe they are for panels lying flat, choose the correct angle and your figures are almost as good as Australia, only real problem is that you can't get nearly as many panels in a field without them shading each other, and an advantage is that the panels work more efficiently when they are cooler.

Hello from Maryland Eastern Shore, Have you heard about Wind Turbines that have torque inverters on them. They increase the rpm exponentially by use of pulleys and cams. At any rate your use of metrics was awesome. Mericans still use fractions but its easier for me to understand joules anyway when i have to use higher radiation values I prefer them. ok thanks Scott - Maryland.

So in the uk the planning portal states The distance between ground level and the lowest part of any wind turbine blade must not be less than five metres. An installation is not permitted if any part of the stand alone wind turbine (including blades) would be in a position which is less than a distance equivalent to the overall height of the turbine (including blades) plus 10 per cent of its height when measured from any point along the property boundary. Which means if you intend to put up a horizontal typical looking 1kw turbine blade diameter 1.8m then the height is 6.8m min the 110percent is 7.48m away from any boundary that means you need a garden about 56m^2 and it be more or less square. Which very few people in a urban setting will have. Plus you will the. Be causing quite a bit of shading to any solar you might have. Roof top wind might fit in better with regs and peoples actual houses like the ones ive seen that look like drums on their sizes with 3 cut out rectangles along roof ridge lines however they are a bit unknown regarding the noise, vibration, resonance and also the cost above and beyond say solar on a similar roof ( not saying both wouldn't fit on a south facing one without shading) but you have to factor in scaffold costs with roof ridge mounting and what if they need maintenance? In alot of ways solar is more predictable, wind requires dump loads and brakes of wind is too strong. I think for alot of these reasons both bureaucratic and economic that wind takes a huge back seat to solar even in the windy dark uk. Btw loved your vid on tethered wind systems.

Thanks Rosie for well balanced objective video. Mounting a wind turbine on a ground fixed tower or pole instead of a roof avoids lots of concerns. In some locations with extended periods of cloudy-wind weather in the winter, off grid hybrid solar/wind/battery along with energy management system on a common pole can be a practical option. Creating a microgrid on a suitable pole by adding high intensity lights, security cameras, wi-fi, EV charger, golf cart charger, etc.. is one of the simplest off-grid systems. Always a trade off between pole height and size of turbine for given load.

Great video, there are many different types of home VAWT, but which one is most efficient for home use?

@kahlernygard809

Жыл бұрын

Hivawt is

I live off grid in Canada, I want to add in small scale wind turbines to vary my power inputs. I'm looking forward to the DIY part. In my imagination, it sits at the peak of the roof and looks like a vertical axis turbine on its side, getting the wind funneled up by the roof. Vibration is a concern. I'll use foam under the bolted on plates...

@adrianthoroughgood1191

Жыл бұрын

There is a wind turbine you can buy for exactly this purpose of catching the wind going up the slope to the ridge line.

Great video. Thank you. I would also add cost £££. I wanted a 3kW turbine (i live in Scotland so we have lots of wind!). It was £25k vs £4k for a 6kW PV array!!

@tlangdon12

Жыл бұрын

The need for a tower, its foundations, dump loads, braking system, and the on-going maintenance all make small-scale wind more expensive than the simpler PV or PV + battery option. For most urban situations, a PV + Battery system combined with variable tarrifs is going to the most cost-effective solution.

Rooftop solar has gotten so cheap it's still worth it in those darker places. You can easily recoup investment cost way before the warranty expires.

The pre-made market built and sold wind turbines... they often say they have these little charge controllers that come with them. But what I don't understand is if they have enough wiring to go from the wind turbine to the charge controller to buy it separate? Do they do this? Or are you supposed to look for the wiring separately? And do you have to buy the wiring separately to go from the wind mill to the charge controller? That could be a lot of wiring if the wind mill is high up, since the charge controller is probably likely to be at the battery bank and power inverter which won't be at the top of the wind mill? Any advise?

Urban settings often have a Ventura effect to the prevailing wind. Are there any recorded cases where this is expolited to effect

1. Rooftop turbines are a tiny resource, as noted here. 2. Even in Europe with assistance from offshore wind etc solar can to the job just fine. Rosie's video on Sunovate air cooled solar shows that we can use thermal as well as electricity from rooftop, so greatly increasing total energy use. Agrivoltaics means that we can in utility scale solar use as much land as we need to, shading and reducing water consumption for plants. Storage can be done for renewables overnight using EneryDome's supercritical CO2 system, way cheaper than batteries. For seasonal storage GKN Hydrogens' hydride storage can reach electrical plus thermal efficiencies of 90%, good enough even for Scandinavian winters. Energy expert Martin, interviewed by Rosie, was rather down on converting natural gas pipelines for hydrogen transport, basically on the grounds that you can transport a lot less energy for a given pipeline when it is hydrogen. True enough, but 30% or so of current volumes in, say, the German or UK grid is just fine, as in any reasonable scenario we won't be moving as much about, with combinations of rooftop solar itself, local storage in things like EnergyDomes, heat pumps, better insulation etc making the capabilities of a converted grid in fact a very good fit for the volumes of hydrogen we are still going to need to pump about. We seem to have all the tools we need for decarbonisation. Doing it is another matter, of course.

Vid start in full Aus is sunny mode followed by 4:52 Rosie wrapped up for winter under a dark sky :-)

Hi! We're currently conceptualizing a wind-powered paddle aerator. We're thinking of just harnessing the mechanical power of the wind or a hybrid of mechanical and electrical. Do you think it would work? Which do you think is the better option? Btw, I'm not an engineer and I'm only using the ideas i get from the internet.😁..thanks in advance.

Good point about using what's most naturally abundant in the area. I think you should look at Robert Murray Smith's "Thinking and Tinkering" videos. He's been testing different wind turbine models with varying and promising results. Very informative.

Another big reason urban wind won't work is because your neighbours and councils won't like them, even if they are quiet like Vawts.

Wathing Your briliant explanation of wind speed effect on power generation I started to think about Bernoulli tunel... I googled this concept and foud that it was already invented - Diffuser Augmented Wind Turbine (DAWT). Could You please talk about this in some of your future videos?

My understanding is that while you can generate more wind energy in the middle of nowhere, there's efficiency loss in transmission to consider. When you generate it onsite, you eliminate this loss. Curious how significant that is

With energy storage surely a domestic wind turbine would be an enhancement. Even a small amount should be of benefit. But I suppose I'm missing something.

I see that you are such a sun panel fan but could you comment on different wind generation that big spinning blades? Vertical, ion, vortex, vibration, pods, etc. There are a bunch of new techs around that promise better results in cities.

Great video. I wish there were a way to finance a wind turbine (or a fraction of it) on an ideal location. That would be YOUR turbine. You would split the proceeds with the land owner/farmer. I am unaware of this option anywhere in the world.

Does anyone know if the Aeromine motionless turbine will be sold in Aus? If so, how much, and will it be viable in Brisbane as a suppliment to solar? If not, what is the best reasonably priced unit, and who sells them?

Here in the UK I was taught that 50% pv and 50% wind would here give you a balanced yearly suppy

@TheGerm24

Жыл бұрын

Taught by whom? Were they talking about wind on houses or large wind turbines?

@ajhnubia

Жыл бұрын

@@TheGerm24 taught by nescot Surrey UK where I did my HND IN ENVIRONMENTAL STUDIES and its a general idea, domestic wind is really useful, summer mostly pv and winter mostly wind

Average wind speed here is 10.8 Miles Per Hour. Fortunately I have an old book about wind power, that lets me know that it is enough.

Issue is if your going wind you need to go big to make it worth it because of how power scales with wing span, for a doubling of wing span you get 4x the power, so small scale wind kinda sucks. really the minium size you should be installing is a 2kW system and even then it just to supplement other renewables, even in Denmark or Germany solar first then for the the winter months a little bit of wind goes down a treat, and the reason why I say 2kW of wind is required is because you are only really going to see 500 - 1200W of power generation for a 2kW wind turbine. If it's going to be an equal part of your power source of your power you really need a large system to make it worth it, it happens around the 10kW mark where if that is what you are aiming for wind + solar makes a bunch of sense in planes where you don't get much sun through the winter, 6kW of wind + 4kW of solar will do you fine throughout the year.

Great video, very clear why it doesn't work in urban areas so well. What is interesting about wind is the moments it generates electricity. I am a firm believer that we will all go to hourly pricing of energy, which means winter prices are high (living in Netherlands). And due to recent events it only became worse. Thus, a small wind turbine (if you don't live in an urban area) might become economically viable. I try to be more self sufficient and find it more and more appealing. I am not offgrid, because I also want to export excess solar energy. I live 6km from the coastline in a region marked as windy, and trees are funneling the wind to my house :) And in future with huge energy prices in winter, it will be great. If it only does a few hundred watts it is enough to keep my small heatpump keep the house at temperature during windy winter nights.

@TheGerm24

Жыл бұрын

It seems like solar panels and battery storage would make more sense than wind turbines for most cases. Even in the windy Denmark case, the small turbine was producing only 50W. That isn't going to power much in a home.

@roland9367

Жыл бұрын

@@TheGerm24 I already have solar + battery. The addition of a windmill of 1500 to 2000w peak power would be great. Many days in which it will actually produce that kind of power, like some KZread videos of the istabreeze i1500 for example. But yeah, you can't do that in an urban environment.

Love the content! Keep up the great work! What do you think of a small wind turbine as an addition to a residential solar. I live on a windy edge of a canyon and the solar is great (in Hawaii) but night…

@tonylarose4842

Жыл бұрын

Might be better off having battery backup or better insulation to lower power usage at night

@michaelsmithers4900

Жыл бұрын

@@tonylarose4842 ummm insulation not a factor here, no hvac system in this house, no heat. Our temps are pretty regular here on island but our electricity is the highest in the US.🤙

For someone with hearing impediment it’s hard to understand you probably due to your audio setup maybe? Captions are ok, it would be good to get better audio on your great content. I am sure lots would disagree and suggest it’s my speakers which I tried to change, used head phones and even used an amp on my tv to amplify to no avail. Thanks for the great content I watch it several times to pick it up properly 😊

I was stationed in Germany they don't get sun at night or enough wind. In America we don't get sun at night and no one stores it cause it's expensive. In America I just watched something everyone pays to get connected to the power company which is about $30,000 to $40,000. Mine as well use their power since you paid that much. How do the power companies store power for places where it's dark at night or when not windy? I don't have $40,000 to get connected to power company. Do a renewable energy video at night.

Is there any data on INSTALLATION failure of roof panels? I had a satellite dish on the roof- 4 bolts. They leaked. Inside water damage was just shy of $60K. Dish told me the installer was responsible, who- surprise- was out of business. So how does the panel industry work? Who is responsible if the roof leaks? How long- 90 days? 5 Years? When I ask the panel sales types this question, they ALL tell me they will get back to me. Never happens. Any thoughts?

Rooftop solar panels still quite some challenge for the densely populated countries like India and China where buildings are vertically big and don't have sufficient surface area to meet the energy needs. We gotta find the solution for that.

@EngineeringwithRosie

Жыл бұрын

Yes you're right, in densely populated areas rooftop solar can only make a smaller contribution to the grid than in places like Australia where most people live in single family houses. I think the solution will be a mix of mainly rooftop solar, solar farms and onshore and offshore wind. The proportion of each will vary depending on local conditions and in some places will include other techs like nuclear, solar thermal, geothermal, hydro etc.

@rogermckenzie2711

Жыл бұрын

Here's an option for that. kzread.info/dash/bejne/dpyB0rB_nqjVkdI.html

@rtfazeberdee3519

Жыл бұрын

@@EngineeringwithRosie Check out Two Bit Davinci's channel, he's just release a video about a Canadian company that has solar panels that can be used as building cladding and not look like solar.

Please add the links for your discord and the certified wind turbines. Thanks

Gingerbread turbine surely pays off for the power... hungry :D

Rosie, any thought on Aeromine, the winners of '21 Sandia national labs innovation award? I don't remember have I seen anything similar in your "Back to the Future" video on, basically, endlessly recycling unworkable wind power concepts. They do seem to be easier to maintain and quieter than traditional turbines (in wide sense of "traditional"), but with only marginal applicability. I would like to hear your opinion.

In Ireland I think it's a bigger issue. I live in a rural area and while solar is (usually) amazing in summer but in winter there are says I get 1 to 2 kWh per day from my 6.5 kW array. And unfortunately winter is when I use a lot of electricity. A few small turbines to offset winter electricity usage would be nice to have.

@jensageholm8774

Жыл бұрын

As mentioned on a society level it would be much better if the money is invested in utility scale wind power on- and offshore - much more electricity generated pr. monetary unit. In our end of the world (I live ind Denmark), wind is definitely a more important part of the grid than solar as it fits our usage profile much better. More production in the winter where the heating needs are highest.

@kenoliver8913

Жыл бұрын

Yes - the whole point of this post is that small wind turbines do not make economic snese except in completely off-grid applications. You can get the same amount of renewable eenergy far, far cheaper and far more reliably too with big turbines connected to a grid.

not that the US has the political will for any massive redevelopment projects but i wonder if you could design a city where structures directed and concentrated wind energy somewhere specific and deliberate and then you can put a regular turbine there. that's probably worse than other options but if we have a stunt-architecture budget anyway...

Both is best

@EngineeringwithRosie

Жыл бұрын

If you're trying to off grid then yes, definitely.

@grahammewburn

Жыл бұрын

I live on a boat with 2 solar panels and a wind generator.

I know this video is a little bit old, and that things change so rapidly in the renewable energy space. With the recent price war between solar panel manufacturers, and the substantial drop in prices (30-50% depending on who you believe), do you still think there is a place for residential scale wind turbines, given how expensive they are per kwh produced?

One benefit of wind turbines you didn't mention is that they can be constructed entirely of recycled materials (read: The Boy Who Harnessed the Wind), and they can be entirely recycled in some cases. Solar panels require many expensive, toxic chemicals and materials in their construction that isn't easily recycled and is dangerous when thrown away.

@williambreen1001

11 ай бұрын

Yup, ..if you're going off grid for the sake of self reliance, then, really anything that can be built and maintained at home or at least the cottage-industry level, ..such as wind, concentrated solar thermal, biomass, ..and low tech energy storage, e.g. a heat battery with a stirling generator

What about wind turbines on high rise buildings to power the building