Build A Power Boat , Powered By Wind

save your breath jeremy, this person clearly has no idea what they are talking about, nor have they shown any intention of doing any work beyond fishing for other people to do all the work for them.... then get someone else to pay for it all.... lost cause my friend...

 

at that length and weight ( and a battery powered boat 52' long is bound to weight about twice your estimated 11 metric tons ) hull speed is about 10 knots, so your most efficient speed is either say 9 ish or something over 20 if your expecting to get up on plane. Your estimated top speed of 14 knots is exactly the most inefficient speed possible for this length vessel. So powering over say 30kw is a complete waste of effort. 40 hp will get you to 9knots on flat water no wind in a boat 52' and 25000lbs. Add people and an adequate battery pack and your weight is more likely to be double your estimated.

If you slowed to 7 knots your HP required is 14 or about 10kw and yes on flat water no wind. your 100kw battery pack would then give you about 5 hours of run time, you could run a larger motor, say the 40KW suggested earlier and have some reserve power for less than ideal conditions.

Groper I'm thinking the same but its entertaining and thats what its really all about. Haven't you ever written that destitute Ethiopian princess a few return letters just to see if you get any nudy pictures eventually ?

 

A long cat hull with solar up top and batteries down low with a 6000 watt motor works to go across the ocean. Your motor is too powerful so it will be too energy hungry.

http://www.transatlantic21.org/

what you need is solar power enough to run the motor with out any batteries plus extra capacity for charging so it can run at night.

solar cells right now are 20% efficient for us and 40% for the government and someday in the future we might get 60% efficiency.

http://www.physorg.com/news119107136.html

they are working hard on it.

65% efficiency goal here
http://www.physorg.com/news196257403.html

hot electron solar cells could double efficiencies
http://www.gizmag.com/harnessing-hot-electons-could-double-efficiency-of-solar-cells/15677/

Do you know that God made plants and they are 95% efficient at converting sunlight into more plant?
perhaps we can someday make an algae electric battery, a battery which was once living.
http://www.nanowerk.com/spotlight/spotid=12645.php
http://gas2.org/2009/09/11/algae-ba...-could-revolutionize-energy-storage-industry/

What we can do now is create algae oil fuels or do what anellotech is doing, which is take advantage of what is already working with plants and solar power and make something useful like a fuel.
http://www.anellotech.com/press.html

 

actually what we aught to be doing is collecting waste plastic and melting it down into diesel fuel. Algae based fuels will work fine for terrestrial use but either is a classic case of to little to late. Basically we're screwed no mater how you slice it. What the graph doesn't show is the even sharper rise in CO2 over the last ten years or so, nor does it show the projected CO2 in another ten or twenty years given the ~7% increase in energy use every year




we now return you to your normally scheduled flim flam artist

 

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I disagree, Groper. This person knows very well what he's saying, and it's not about nautical science and engineering.

It's also not about engineering a new boat with a modern and "green" drive system. It's all about obtaining finances to "attempt" it.
Should anyone (from the U.S.) financially assist this endeavor, and not see anything in return, how would they seek reimbursement? They would have to go through the state department, being as the "designer" is in China, and the state department is going to tell them, "too bad, we're not going to upset diplomatic relations over a few hundred thousand dollars"

What was it that is typically attributed to P.T. Barnum?......"There's a sucker born every minute"?

Another quote worth remembering; "If you can't dazzle them with brilliance, baffle them with bull$hit"

Roger.......just another opinionated S.O.B.

 

A few thoughts:
Hockey sticks make lousy paddles.
Gasoline outboard will push boat farther than gasoline generator.
Someone else on forum(I don't remember who) noted that for power 1 pound of gasoline = 100 pounds of battery.
After years working in electric car factory, I am dis-illusioned.

 

No I didn't. Please explain?

 

Be careful Dennis, apparently God doesn't instill much of a sense of humor into "his" people and disagreeing with "them" tends to invoke some pretty nasty business. Even if it was just meant in good fun, apparently the golden rule is optional .

I'd tend to agree with our posters who warn about an impending loss of funds, I've also kinda been wondering if some of the info we're posting might be used against the next likely source of revenue. IE incorporated into the sham as a newer more improved method of hoax

oh
neither of those graphs were the so called hockey stick, IE, Mann's graph of temp. Both were a very accurate representations of atmospheric CO2 levels in there own time frames.

 

We located in Taipei ,Taiwan

Hi , everyone! We located in Taipei ,Taiwan not in China. You can search for
democracy status on web. It just different from China.
http://tw.myblog.yahoo.com/diypower-boat/article?mid=19&prev=22&next=17
Re the battery and wind turbine's performance, they are not obtained by calculations. They are makers test the real products and drew performance
curves. If you use different makers' products, that will have different %. (that you said) I have posted earier. Or, you can check battery maker's website and wind turbine maker's website.

 

Sorry, but the figures are still wrong. There are no lead acid batteries made on this planet that have a Peukert number of unity, they all, without exception, have Peukert number that is greater than 1, usually around 1.2 to 1.3.

If the battery manufacturer is telling you that you can get 108kWh of usable power for the life of the battery from a battery pack with a stated capacity of 108kWh then he isn't telling the truth.

The only battery chemistry around that has a Peukert number of very close to unity is lithium ion (and by that I mean pretty much all the lithium chemistries, LiMn, LiCo, LiFePO4 etc).

Similarly, if the wind turbine is rated for 1.2kW at 10kts, then it will be rated at 9.6kW at 20kts, not the 5Kw you quoted earlier. This is because of the cube law relationship between wind speed and power. Double the wind speed and you get 8 times the power. The big problem is that drag rises in proportion to the square of wind speed so as the wind speed increases the forces on the blades, mast and hull rise rapidly (doubling the wind speed from 10kts to 20kts quadruples the forces on the blades and mast).

If these manufacturers are giving you such questionable data then I think you should double check with some independent testing. For example, why not buy one of the batteries you intend to use and do some charge/discharge testing at your anticipated rate of around 1C? (which would mean discharging a single 100Ah battery at 100A into a suitable resistive load). I will guarantee that the battery won't deliver it's rated capacity at this discharge rate and can also guarantee that its cycle life will be severely reduced if you discharge it regularly below around 20 to 30% capacity.

If you doubt what I'm telling you, then check out Peukert's law here: http://en.wikipedia.org/wiki/Peukert's_law

 

Jeremy is right about the battery technology.

http://en.wikipedia.org/wiki/Taiwan

 

Ha, well if you need to ask, then I know what your thinking.
Ask much of the world they will say God made plants.
My point is the natural universe is already well optimized and should learn and take advantage of that.


Read more from this Tulsa World article at http://www.tulsaworld.com/news/article.aspx?articleID=20080623_13_Ameri21583
http://www.tulsaworld.com/news/article.aspx?articleID=20080623_13_Ameri21583

 

All energy comes from God, who Himself made everything.

 

95 percent efficiency for plants is not correct though. 'some' process within the system might be in that range but as a whole not even close.

 

The efficiency of the photosynthesis is around 5-6 percent. The 95% figure is not even theoretically possible.