Looks like it's been done. At least it is dated 2013 instead of 1913!
So...take the water jacket off to avoid the need for an electric water pump?

wayneh, there are cast ears on the bottom part, on the right of the photo.

I'd place the water pump on the back of the device, with its main shaft directly attached to the impeller. Since the pump would only be recirculating water from the insulated tank, its power drag would be minimal.

 

wayneh, there are cast ears on the bottom part, on the right of the photo.

I'm wondering if that's enough. I think the torque could be substantial.

 

I'm wondering if that's enough. I think the torque could be substantial.

There could also be cast ears on the top part that is not shown in the picture

 

Guess I confused everyone at first with my toroid question... But this also seems to clarify that pure eddy current generation would be the most efficient approach.

This is the standard method at AAC. You paint yourself into a corner and then don't say what the original goal was, at least until much later. Everybody works on building a way out of the corner when it would be much easier to use a different approach.

And...the energy used by the water pump will be absorbed by the water it is pumping (if you do it right).

 

Hi,

I was under the impression that you wanted to use wires. If the steel shell idea is ok, then that is already known to work so i dont see what the problem is.

The pdf was interesting though. They even took into account the type of flow they wanted in order to reduce what might end up as being laminar flow. Since that approach seems to work for a given power level (above 3kW) then maybe you should just go with that.
The other 'rotational heating machine' was interesting too, with the propeller.

 

There are several patents which are of great interest.
This one in particular. ..
http://www.google.com/patents/US4486638

The invention supposedly optimises the mechanical speed - power relationship. It also uses a magnetic yoke to enhance field containment.

 

There are several patents which are of great interest.
This one in particular. ..
http://www.google.com/patents/US4486638

The invention supposedly optimises the mechanical speed - power relationship. It also uses a magnetic yoke to enhance field containment.

It seems that I'm more than 30 years behind with my "Big Idea":

"In an important use of the invention where said machine will be a wind turbine the power amount picked up thereby will vary as the cube value of the wind speed, under optimum efficiency conditions which are characterized by an operation at a constant specific speed, which is equal to the ratio from the rotor peripheral speed to the wind speed."

 

Using the "standing on the shoulders of giants" notion there is always room for improvement of a great idea. Particularly for instance as new materials & complimentary technologies become available.

 

It seems to me that pretty much all that matters is, "big enough". The heater has to be big enough to use up all the energy the wind provides. If the wind is slow today, the armature just turns slower, but all the energy will turn into heat.
The only reason to use frightening magnets is to reduce the size. Cheaper and larger is usually better unless it's a government contract.

 

I agree. If you need hotter water, let the wind do the bulk heating and use a small immersion heater for on-demand heating to top it off when/if you need to.

 

TCM, posted this over at ETO and I thought of this thread and you. https://www.youtube.com/watch?x-yt-cl=84503534&v=8n5sSmJsCdY&x-yt-ts=1421914688 I hate Youtube spend way too much time after going for one thing. From the last link there was this one,

And there's more if you want them.

 

TCM, posted this over at ETO and I thought of this thread and you. I hate Youtube spend way too much time after going for one thing. From the last link there was this one, And there's more if you want them.

Excellent video, thanks... It's nice to see an electrically based heater which in a way is inherently safe, since the chances of short circuiting are virtually nil. I wonder what it's efficiency is compared to the use of a heating element.

 

This one does not use the water (vegetable oil) to cool the motor, so that heat escapes.
The machine in the patent (post 106) must work better because the motor heat IS the heat source.

 

This one does not use the water (vegetable oil) to cool the motor, so that heat escapes.
The machine in the patent (post 106) must work better because the motor heat IS the heat source.

Good point... a better design would've been to first wrap a coil around the motor and then connect that coil to the coil being heated by the magnets... First take any heat away from the motor and then heat again at the magnetic induction section ...