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pengyou
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Posted: 21 May 2018 at 9:42pm | IP Logged Quote pengyou

I hope the subject is not misleading. I am shopping for land now and most of the land I am leaning towards has a healthy flow of wind at least 20 hours a day almost every day of the year. I compare this to using pv cells to generate electricity, which would have, at most 5 hours of useful light in the winter. It seems to me that using wind would require me to have a smaller battery pack than pv cells, therefore reducing my upfront costs. Is my thinking correct? am I on the right track?

Secondly, If I entered into a situation that gave me excess electricity I could use the excess to generate hydrogen from water, store that and use it for heating, cooking etc. Hydrogen gas can be injected into either diesel or gasoline engines to improve economy. Is that reasonable?

Finally, I have read on most pages that horizontal shaft mills are more durable than vertical shaft mills. True? A generality? I have read a couple of websites that state that recently, because of new materials, etc that this may not be the case anymore. I am particularly interesting in this question because I have also read that vsm can be used at higher wind speeds. True?

Don't be afraid to throw links at me - I am especially fond of Jimmy Deans ;) I am hoping that I can get enough info from this post to help me structure and direct my research into this topic, and to give me a good overview. I'm not afraid to get my hands dirty with digital dirt!

One final question: with wind turbines, does the concept of sprung weight become important at some point?

Edited by pengyou on 21 May 2018 at 9:44pm



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electrondady1
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Posted: 22 May 2018 at 12:35am | IP Logged Quote electrondady1

i live in town so wind is just a hobby with me . most guys who are seriously off grid use both methods of generation.
if you have a wind resource why not use it .

you can generate hydrogen with as little as 2 volts, but the more power in the more you get out . storage and safety are the main hurdles. keep the gasses separate . this guy has a series of videos about production compression and usage . he takes precautions.https://youtu.be/llmcU-mZRFs . https://youtu.be/REV739pRNcw DON'T MIX THE GASSES there are lots of people on you tube trying to blow them selves up .

i build vertical drag mills. they are less efficient at producing power than horizontal mills.



Edited by electrondady1 on 22 May 2018 at 12:47am
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Gizmo
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Posted: 22 May 2018 at 10:26am | IP Logged Quote Gizmo

pengyou wrote:


Finally, I have read on most pages that horizontal shaft mills are more durable than vertical shaft mills. True? A generality?


Not durable, just easier. Most of us who have built our own wind turbines have at one time played around with verticals. And we soon realised verticals make great garden art, because they dont scale up easily.

Its all about the area facing the oncoming wind, and its much much much easier to build a larger diameter horizontal than a bigger vertical.

Horizontals also run smoother, are less demanding on the tower, lighter, and more efficient.

Glenn

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George65
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Posted: 23 May 2018 at 2:23pm | IP Logged Quote George65

electrondady1 wrote:
DON'T MIX THE GASSES there are lots of people on you tube trying to blow them selves up .



I have been looking at the same thing, again, this last few days.
Been trying to get a handle on the safety ( geez what a dirty word for me) and practicality of hydrogen.

I'm not the sharpest tool in the shed but you only have to look at the fact industrially, NO ONE mixes the fuel and oxidizer together to know there must be a GOOD reason why.
YT is Full of these people claiming Miracles for Hohoho gas but the only miracle I see is some of these people have been playing with it great Qty for years and are still here to make Vids about it.

I really don't know how they manage it. They burn it in torches and even cook stoves and live to mislead others that it's a viable practice. I believe when your time is up it's up but I also believe it's not a good idea to buy up all the tickets you possibly get to increase your chances of winning that particular lottery.

I am testing output of Hydrogen production using aluminum and Koh.
I have Loads of scrap aluminum, just the solar mounting rails I have is probably 50+ Kg of the stuff and also a Bag of Koh I used for cleaning up Veg oil spills when I was processing a lot of WVO.

I have done some experiments in 3L milk jugs and the production looks OK. The upside of chemical production is you only get Hydrogen and are not effectively wasting energy making oxygen you don't want.
The aluminum seems to last very well, What I need to see is how far the KOH goes.

I have a LOT of aluminum I melted down and ran into a water bath which gives aluminum cornflakes. Perfect for this having a huge surface area for weight. Would also lend itself to Variable production rates. Put the aluminum in a vessel like a length of pipe with openings at each end. Top takes off the hydrogen, Bottom pumps in and drains the Koh solution. Greater the depth of the Koh solution, greater the production of Hydrogen.
My plan would be however to store the hydrogen with Probably a batch process.

I just made a ground mount frame for 5x 250W panels. It will be interesting to see how much Hydrogen I can get from pumping a KW of power into an electrolysis arrangement.
Biggest hurdle I see is how to keep it cool.
With the solar aluminium rails came a lot of roof mounting brackets which are all stainless. They will make good electrode plates with the tails trimmed and welded along a length of rod.

Few design issues to work out with this like do I have to have as many plates on the oxygen side as I do the hydrogen side or will I limit the power transfer and If I have say 2 25L drums, Can I connect them just with say a 3/4" hose to the respective electrode sides or do I need to have like 4" to get all the power across to get over something like resistance in electrical cabling?
Lot's of info on blow up gas but not so much I can find just on Hydrogen.

Using solar power like this may not be real efficient but I guess it's more efficient than throwing it away and may give storage advantages without going to the cost and complexity of batteries.




Edited by George65 on 23 May 2018 at 2:25pm
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