## Re: [axialflux] Re: Low wind speeds

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• Steve I know how to calculate TSR, I referencing the example you gave ! at 5 mph, 9 blades might put out 35 watts. What was the TSR for that setup and also
Message 1 of 14 , Oct 31, 2009
 SteveI know how to calculate TSR, I referencing the example you gave ! "at 5 mph, 9' blades might put out 35 watts."What was the TSR for that setup and also what was the machines voltage i.e. 12, 24, 48 ???All My Best Bill --- On Sat, 10/31/09, Steve Spence wrote:From: Steve Spence Subject: [axialflux] Re: Low wind speedsTo: axialflux@yahoogroups.comDate: Saturday, October 31, 2009, 7:27 PMTo determine tsr, you need a few things. Tip Speed: radius (blade length) distance (2 * pi * r) tip speed = (distance / time(s) ) The blades travel one circumference (2Πr) in a rotation time of T (seconds). TSR = Tip Speed / Wind Speed http://www.kidwind. org/PDFs/ SUPPORT_Math_ Tip%20Speed% 20Ratio.pdf http://askville. amazon.com/ calculate- RPM-wind- turbine-relative -velocity/ AnswerViewer. do?requestId= 8215850 --- In axialflux@yahoogrou ps.com, Bill Williams wrote: > > Yes Steve, but at what TSR ? > B. > > --- On Sat, 10/31/09, Steve Spence wrote: > > From: Steve Spence > Subject: Re: [axialflux] Low wind speeds > To: axialflux@yahoogrou ps.com > Date: Saturday, October 31, 2009, 5:23 PM > > > > > > >   > > > > > > at 5 mph, 9' blades might put out 35 watts. > > > > run your own numbers at http://www.green- trust.org/ windpowercalc/ > > > > Steve Spence > > Renewable energy and self sufficiency > > http://www.green- trust.org > > http://makingtheweb work.blogspot. com/ > > > > JohnnyO wrote: > > > > > > > > > Steve, what would 5mph start up do for > > > The design ???? > > > > > > We've got quite a bit of 5-10mph winds > > > Above 30meters here. > > > > > > If I could design for 5mph startup then > > > We could enjoy almost 190days of pulling > > > Power from wind. > > > > > > I know this from using a anomometer logger > > > So these aren't # s I'm pulling out of my butt. > > > > > > JohnnyO > > > Wireless & Remote Power Systems Consulting > > > JohnnyO@apgwireless .com > > > (337)368-7188 > > > > > > sent from my iPhone > > > > > > On Oct 31, 2009, at 8:50 AM, Steve Spence > > > wrote: > > > > > >> > > >> > > >> 3-5 mph winds are very expensive to design for, as there's little to no > > >> power at that speed. > > >> > > >> Steve Spence > > >> Renewable energy and self sufficiency > > >> http://www.green- trust.org > > >> http://makingtheweb work.blogspot. com/ > > >> > > >> JohnnyO wrote: > > >> > > > >> > > > >> > I am in southwest Louisiana. I am interested > > >> > In building an axialflux wg but have a few questions. > > >> > > > >> > 1st let me say I run a small rural wisp and have a very beefy tower > > >> > In my backyard. Mounting at 100ft is no problem. > > >> > > > >> > We only have 90-120 days of decent wind here. > > >> > > > >> > I would like to know what would be involved in the building > > >> > Of an axialflux designed to produce 300watts at 24volts in winds > > >> > Of 3-5 mph ??? 12volts or 48volts could work also. > > >> > > > >> > Our primary source of power will be coming from solar but I would > > >> > Like to be able to capture some from the free winds we > > >> > Do have also. > > >> > > > >> > My current battery bank is setup as 24volt. I went with 24volt > > >> > To reduce wire size needed. > > >> > > > >> > JohnnyO > > >> > Wireless & Remote Power Systems Consulting > > >> > JohnnyO@apgwireless .com > > >> > > >> > (337)368-7188 > > >> > > > >> > sent from my iPhone > > >> > > > >> > > > >> > > > >

• Steve, ever wanted to do something so badly you end up Frustrated b/c the #s never work out ? LOL It s not looking good for the hometeam unless I were to go
Message 2 of 14 , Oct 31, 2009
Steve, ever wanted to do something so badly you end up
Frustrated b/c the #s never work out ? LOL

It's not looking good for the hometeam unless I were to go with

If I were only 10 miles closer to the coast or 175ft of a tower.....

Costs just don't justify results at this point in time. But who knows
What tommorrow will bring.

Will just focus on increasing methane production and slowly

JohnnyO
Wireless & Remote Power Systems Consulting
(337)368-7188

sent from my iPhone

On Oct 31, 2009, at 7:23 PM, Steve Spence <sspence@...> wrote:

at 5 mph, 9' blades might put out 35 watts.

run your own numbers at http://www.green- trust.org/ windpowercalc/

Steve Spence
Renewable energy and self sufficiency
http://www.green- trust.org
http://makingtheweb work.blogspot. com/

JohnnyO wrote:
>
>
> Steve, what would 5mph start up do for
> The design ????
>
> We've got quite a bit of 5-10mph winds
> Above 30meters here.
>
> If I could design for 5mph startup then
> We could enjoy almost 190days of pulling
> Power from wind.
>
> I know this from using a anomometer logger
> So these aren't # s I'm pulling out of my butt.
>
> JohnnyO
> Wireless & Remote Power Systems Consulting
> JohnnyO@apgwireless .com <mailto:JohnnyO@apgwireless .com>
> (337)368-7188
>
> sent from my iPhone
>
> On Oct 31, 2009, at 8:50 AM, Steve Spence <sspence@green-trust.org
> <mailto:sspence@green-trust.org>> wrote:
>
>>
>>
>> 3-5 mph winds are very expensive to design for, as there's little to no
>> power at that speed.
>>
>> Steve Spence
>> Renewable energy and self sufficiency
>> <http://www.green- trust.org>http://www.green- trust.org
>> <http://makingtheweb work.blogspot. com/>http://makingtheweb work.blogspot. com/
>>
>> JohnnyO wrote:
>> >
>> >
>> > I am in southwest Louisiana. I am interested
>> > In building an axialflux wg but have a few questions.
>> >
>> > 1st let me say I run a small rural wisp and have a very beefy tower
>> > In my backyard. Mounting at 100ft is no problem.
>> >
>> > We only have 90-120 days of decent wind here.
>> >
>> > I would like to know what would be involved in the building
>> > Of an axialflux designed to produce 300watts at 24volts in winds
>> > Of 3-5 mph ??? 12volts or 48volts could work also.
>> >
>> > Our primary source of power will be coming from solar but I would
>> > Like to be able to capture some from the free winds we
>> > Do have also.
>> >
>> > My current battery bank is setup as 24volt. I went with 24volt
>> > To reduce wire size needed.
>> >
>> > JohnnyO
>> > Wireless & Remote Power Systems Consulting
>> > JohnnyO@apgwireless .com <mailto:JohnnyO% 40apgwireless. com>
>> <mailto:JohnnyO% 40apgwireless. com>
>> > (337)368-7188
>> >
>> > sent from my iPhone
>> >
>> >
>>
>

• It s a theoretical machine. He hasn t built one yet. I don t know the rpm, blade length, or voltage of a machine that has not yet been built. Steve Spence
Message 3 of 14 , Nov 1, 2009
It's a theoretical machine. He hasn't built one yet. I don't know the
rpm, blade length, or voltage of a machine that has not yet been built.

Steve Spence
Renewable energy and self sufficiency
http://www.green-trust.org
http://makingthewebwork.blogspot.com/

Bill Williams wrote:
>
>
> Steve
> I know how to calculate TSR, I referencing the example you gave !
> "at 5 mph, 9' blades might put out 35 watts."
> What was the TSR for that setup and also what was the machines voltage
> i.e. 12, 24, 48 ???
> All My Best
> Bill
>
> --- On *Sat, 10/31/09, Steve Spence /<sspence@...>/* wrote:
>
>
> From: Steve Spence <sspence@...>
> Subject: [axialflux] Re: Low wind speeds
> To: axialflux@yahoogroups.com
> Date: Saturday, October 31, 2009, 7:27 PM
>
>
>
> To determine tsr, you need a few things.
>
> Tip Speed:
> distance (2 * pi * r)
> tip speed = (distance / time(s) )
>
> The blades travel one circumference
> (2Πr) in a rotation time of T
> (seconds).
>
> TSR = Tip Speed / Wind Speed
>
> http://www.kidwind. org/PDFs/ SUPPORT_Math_ Tip%20Speed% 20Ratio.pdf
> <http://www.kidwind.org/PDFs/SUPPORT_Math_Tip%20Speed%20Ratio.pdf>
>
> http://askville. amazon.com/ calculate- RPM-wind- turbine-relative
>
> --- In axialflux@yahoogrou ps.com
> </mc/compose?to=axialflux%40yahoogroups.com>, Bill Williams
> <vipond50@.. .> wrote:
> >
> > Yes Steve, but at what TSR ?
> > B.
> >
> > --- On Sat, 10/31/09, Steve Spence <sspence@... > wrote:
> >
> > From: Steve Spence <sspence@... >
> > Subject: Re: [axialflux] Low wind speeds
> > To: axialflux@yahoogrou ps.com
> </mc/compose?to=axialflux%40yahoogroups.com>
> > Date: Saturday, October 31, 2009, 5:23 PM
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > at 5 mph, 9' blades might put out 35 watts.
> >
> >
> >
> > run your own numbers at http://www.green- trust.org/ windpowercalc/
> >
> >
> >
> > Steve Spence
> >
> > Renewable energy and self sufficiency
> >
> > http://www.green- trust.org
> >
> > http://makingtheweb work.blogspot. com/
> >
> >
> >
> > JohnnyO wrote:
> >
> > >
> >
> > >
> >
> > > Steve, what would 5mph start up do for
> >
> > > The design ????
> >
> > >
> >
> > > We've got quite a bit of 5-10mph winds
> >
> > > Above 30meters here.
> >
> > >
> >
> > > If I could design for 5mph startup then
> >
> > > We could enjoy almost 190days of pulling
> >
> > > Power from wind.
> >
> > >
> >
> > > I know this from using a anomometer logger
> >
> > > So these aren't # s I'm pulling out of my butt.
> >
> > >
> >
> > > JohnnyO
> >
> > > Wireless & Remote Power Systems Consulting
> >
> > > JohnnyO@apgwireless .com <mailto:JohnnyO@ apgwireless .com>
> >
> > > (337)368-7188
> >
> > >
> >
> > > sent from my iPhone
> >
> > >
> >
> > > On Oct 31, 2009, at 8:50 AM, Steve Spence <sspence@green- trust.org
> >
> > > <mailto:sspence@ green- trust.org>> wrote:
> >
> > >
> >
> > >>
> >
> > >>
> >
> > >> 3-5 mph winds are very expensive to design for, as there's
> little to no
> >
> > >> power at that speed.
> >
> > >>
> >
> > >> Steve Spence
> >
> > >> Renewable energy and self sufficiency
> >
> > >> <http://www.green- trust.org>http://www.green- trust.org
> >
> > >> <http://makingtheweb work.blogspot. com/>http://makingtheweb
> work.blogspot. com/
> >
> > >>
> >
> > >> JohnnyO wrote:
> >
> > >> >
> >
> > >> >
> >
> > >> > I am in southwest Louisiana. I am interested
> >
> > >> > In building an axialflux wg but have a few questions.
> >
> > >> >
> >
> > >> > 1st let me say I run a small rural wisp and have a very beefy
> tower
> >
> > >> > In my backyard. Mounting at 100ft is no problem.
> >
> > >> >
> >
> > >> > We only have 90-120 days of decent wind here.
> >
> > >> >
> >
> > >> > I would like to know what would be involved in the building
> >
> > >> > Of an axialflux designed to produce 300watts at 24volts in winds
> >
> > >> > Of 3-5 mph ??? 12volts or 48volts could work also.
> >
> > >> >
> >
> > >> > Our primary source of power will be coming from solar but I would
> >
> > >> > Like to be able to capture some from the free winds we
> >
> > >> > Do have also.
> >
> > >> >
> >
> > >> > My current battery bank is setup as 24volt. I went with 24volt
> >
> > >> > To reduce wire size needed.
> >
> > >> >
> >
> > >> > JohnnyO
> >
> > >> > Wireless & Remote Power Systems Consulting
> >
> > >> > JohnnyO@apgwireless .com <mailto:JohnnyO% 40apgwireless. com>
> >
> > >> <mailto:JohnnyO% 40apgwireless. com>
> >
> > >> > (337)368-7188
> >
> > >> >
> >
> > >> > sent from my iPhone
> >
> > >> >
> >
> > >> >
> >
> > >>
> >
> > >
> >
>
>
>
• Thanks Steve for the reply All My Best Bill ... From: Steve Spence Subject: Re: [axialflux] Re: Low wind speeds To:
Message 4 of 14 , Nov 1, 2009
 Thanks Steve for the replyAll My BestBill --- On Sun, 11/1/09, Steve Spence wrote:From: Steve Spence Subject: Re: [axialflux] Re: Low wind speedsTo: axialflux@yahoogroups.comDate: Sunday, November 1, 2009, 6:48 AMIt's a theoretical machine. He hasn't built one yet. I don't know the rpm, blade length, or voltage of a machine that has not yet been built. Steve Spence Renewable energy and self sufficiency http://www.green- trust.org http://makingtheweb work.blogspot. com/ Bill Williams wrote: > > > Steve > I know how to calculate TSR, I referencing the example you gave ! > "at 5 mph, 9' blades might put out 35 watts." > What was the TSR for that setup and also what was the machines voltage > i.e. 12, 24, 48 ??? > All My Best > Bill > > --- On *Sat, 10/31/09, Steve Spence //* wrote: > > > From: Steve Spence > Subject: [axialflux] Re: Low wind speeds > To: axialflux@yahoogrou ps.com > Date: Saturday, October 31, 2009, 7:27 PM > > > > To determine tsr, you need a few things. > > Tip Speed: > radius (blade length) > distance (2 * pi * r) > tip speed = (distance / time(s) ) > > The blades travel one circumference > (2Πr) in a rotation time of T > (seconds). > > TSR = Tip Speed / Wind Speed > > http://www.kidwind. org/PDFs/ SUPPORT_Math_ Tip%20Speed% 20Ratio.pdf > > > http://askville. amazon.com/ calculate- RPM-wind- turbine-relative > -velocity/ AnswerViewer. do?requestId= 8215850 > > > --- In axialflux@yahoogrou ps.com > , Bill Williams > wrote: > > > > Yes Steve, but at what TSR ? > > B. > > > > --- On Sat, 10/31/09, Steve Spence wrote: > > > > From: Steve Spence > > Subject: Re: [axialflux] Low wind speeds > > To: axialflux@yahoogrou ps.com > > > Date: Saturday, October 31, 2009, 5:23 PM > > > > > > > > > > > > > > > > > > > > > > > > > > at 5 mph, 9' blades might put out 35 watts. > > > > > > > > run your own numbers at http://www.green- trust.org/ windpowercalc/ > > > > > > > > Steve Spence > > > > Renewable energy and self sufficiency > > > > http://www.green- trust.org > > > > http://makingtheweb work.blogspot. com/ > > > > > > > > JohnnyO wrote: > > > > > > > > > > > > > > > Steve, what would 5mph start up do for > > > > > The design ???? > > > > > > > > > > We've got quite a bit of 5-10mph winds > > > > > Above 30meters here. > > > > > > > > > > If I could design for 5mph startup then > > > > > We could enjoy almost 190days of pulling > > > > > Power from wind. > > > > > > > > > > I know this from using a anomometer logger > > > > > So these aren't # s I'm pulling out of my butt. > > > > > > > > > > JohnnyO > > > > > Wireless & Remote Power Systems Consulting > > > > > JohnnyO@apgwireless .com > > > > > (337)368-7188 > > > > > > > > > > sent from my iPhone > > > > > > > > > > On Oct 31, 2009, at 8:50 AM, Steve Spence > > > > > wrote: > > > > > > > > > >> > > > > >> > > > > >> 3-5 mph winds are very expensive to design for, as there's > little to no > > > > >> power at that speed. > > > > >> > > > > >> Steve Spence > > > > >> Renewable energy and self sufficiency > > > > >> http://www.green- trust.org > > > > >> http://makingtheweb > work.blogspot. com/ > > > > >> > > > > >> JohnnyO wrote: > > > > >> > > > > > >> > > > > > >> > I am in southwest Louisiana. I am interested > > > > >> > In building an axialflux wg but have a few questions. > > > > >> > > > > > >> > 1st let me say I run a small rural wisp and have a very beefy > tower > > > > >> > In my backyard. Mounting at 100ft is no problem. > > > > >> > > > > > >> > We only have 90-120 days of decent wind here. > > > > >> > > > > > >> > I would like to know what would be involved in the building > > > > >> > Of an axialflux designed to produce 300watts at 24volts in winds > > > > >> > Of 3-5 mph ??? 12volts or 48volts could work also. > > > > >> > > > > > >> > Our primary source of power will be coming from solar but I would > > > > >> > Like to be able to capture some from the free winds we > > > > >> > Do have also. > > > > >> > > > > > >> > My current battery bank is setup as 24volt. I went with 24volt > > > > >> > To reduce wire size needed. > > > > >> > > > > > >> > JohnnyO > > > > >> > Wireless & Remote Power Systems Consulting > > > > >> > JohnnyO@apgwireless .com > > > > >> > > > > >> > (337)368-7188 > > > > >> > > > > > >> > sent from my iPhone > > > > >> > > > > > >> > > > > > >> > > > > > > > > > >

• tharks.blogspot.com
Message 5 of 14 , Nov 3, 2009

tharks.blogspot.com

• How would this work with an axial flux alternator? Steve Spence Renewable energy and self sufficiency http://www.green-trust.org
Message 6 of 14 , Nov 3, 2009
How would this work with an axial flux alternator?

Steve Spence
Renewable energy and self sufficiency
http://www.green-trust.org
http://makingthewebwork.blogspot.com/

Tharks V wrote:
>
>
>
> tharks.blogspot.com
>
>
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