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Re: Dummy load?

Sounds like what you need is a watt/hour meter, or an Amp/hour meter. Or take frequent amp readings and integrate. Remember that for non constant current a digital meter can get confused and report an incorrect reading - I think that's how a few over-unity myths have started.
by faarizamar
on Thu Jan 15, 2015 11:40 am
 
Forum: Electrics and controls
Topic: Dummy load?
Replies: 2
Views: 3141

Re: alternator power

how can we use solar panel in town or village if we have lack of recourse....now days we are use water as a power in our town.



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basit
by basit
on Tue Nov 11, 2014 8:22 am
 
Forum: Electrics and controls
Topic: alternator power
Replies: 7
Views: 6625

Re: Using a Car alternator.

Hi DIYman. First step is to check what rpm is needed to get the voltage you want. Say you want to run a 12V system, then it means you need 14V from the alternator. So spin it until it gets 14V, and measure the rpm. How to do this depends on your instruments and ingenuity!
by Chikky123
on Thu Oct 30, 2014 3:00 pm
 
Forum: General
Topic: Using a Car alternator.
Replies: 1
Views: 4370

Re: Hello everyone

Knowing how to save the Earth, however, is not the same as actually doing it. Although we are gradually beginning to seriously develop alternative energy sources, the reality is that we have a very long way to go. You can choose ...
by namal
on Mon Oct 27, 2014 6:28 am
 
Forum: General
Topic: Hello everyone
Replies: 4
Views: 4197

Re: Darling Wind Power

That is high. I wonder how well it would work in reverse? My guess it would offer a lot of resistance, and there may be a lot of static friction - i.e. it would need a lot of torque to start it spinning. A worm gear will not work in reverse at all!
by Arslan01
on Thu Oct 23, 2014 7:34 am
 
Forum: General
Topic: Darling Wind Power
Replies: 3
Views: 3952

Re: Micro wind turbines for rural homes in Africa

What voltage do you intend to get from the generator? How far apart will the magnets be? You are using very small magnets and very few coil winds, which means you will need to get a high RPM to get a reasonable voltage.Normally that means shorter blades, ...
by syed20
on Tue Oct 21, 2014 1:38 pm
 
Forum: General
Topic: Micro wind turbines for rural homes in Africa
Replies: 3
Views: 5109

Re: Blade profile calculation

Thanks windgat for the codes to find blade profile calculation. I was so confused at this topic and had no idea how I can calculate this one. I tried to search in many websites but nothing was enough satisfactory. Your help was indeed very helpful and in the right time too. ___________________________________ ...
by janemcready
on Fri Apr 04, 2014 1:45 pm
 
Forum: Blades and Hub
Topic: Blade profile calculation
Replies: 26
Views: 17920

Re: New propeller design

Hi there. Did you find anyone to share your enthusiasm up there in Gauteng? I would be most interested to hear how your testing has been going!
by windgat
on Mon Mar 17, 2014 5:48 pm
 
Forum: General
Topic: New propeller design
Replies: 3
Views: 3618

Re: Batteries

Its worth checking the voltage - you never know! It depends a lot on how charged the battery was st the start of its 'long sleep'. You may find one (or more) cells is delivering 0V - that would means recovery is unlikely. I haven't tried a desulphator myself. ...
by windgat
on Sun Mar 16, 2014 9:53 am
 
Forum: Electrics and controls
Topic: Batteries
Replies: 14
Views: 11015

Re: Weird blades

Also note how the blades are broader nearer the tip, the opposite to the usual aerodynamic design.
by zohanx747
on Mon Nov 04, 2013 7:52 am
 
Forum: Blades and Hub
Topic: Weird blades
Replies: 5
Views: 4148

Re: Batteries

My estimation of how hot the elements would get and how much current the whole arrangement would take. I thought 1.3 amp through 23 ohm resistance W = I squared R or 38.87 W per element and when you use it to boil water you use 2000W ...
by timpane
on Sat Sep 14, 2013 1:25 pm
 
Forum: Electrics and controls
Topic: Batteries
Replies: 8
Views: 6122

Re: Different Stator needed??

Great question(s)! I don't know how hot the stator gets - I have never monitored it. Of course, there is a neat factor in that the hotter the stator gets, the harder the wind must be blowing, which means the stator is naturally cooled if ...
by siamon
on Tue Aug 13, 2013 2:28 pm
 
Forum: Stators and coils
Topic: Different Stator needed??
Replies: 2
Views: 2251

Re: Diy Electric Solar

How Solar panel is Successful in future :?:
I mean what is the scope of Solar panel ....May i installed it for home or not ???
Thansk in advance for suggestion . :thumbup:
by Jacob
on Thu Jul 11, 2013 5:02 am
 
Forum: Free Energy?
Topic: Diy Electric Solar
Replies: 8
Views: 7337

Need some advise please

... is this. Has anyone use capacitors in this way and got results, if so please could you post the schematic of the size of capacitors used and how they were wired. Also would like to know if I should turn the turbine in a down wind type, with out the furling tail.
by Jay
on Tue Apr 23, 2013 8:55 am
 
Forum: General
Topic: Need some advise please
Replies: 3
Views: 3626

Re: Water cooling a stator for more efficiency

Great question(s)! I don't know how hot the stator gets - I have never monitored it. Of course, there is a neat factor in that the hotter the stator gets, the harder the wind must be blowing, which means the stator is naturally cooled if ...
by windgat
on Wed Apr 17, 2013 2:48 pm
 
Forum: Stators and coils
Topic: Water cooling a stator for more efficiency
Replies: 1
Views: 1776

Water cooling a stator for more efficiency

Hi All, How hot does a stator get? Can it be water cooled? My idea is to cast some channels in/around the coils and pump cold water through the stator, would this work, and if so wouldn't it improve the efficiency of the generator. ...
by EmeraldIsle
on Mon Apr 15, 2013 1:27 pm
 
Forum: Stators and coils
Topic: Water cooling a stator for more efficiency
Replies: 1
Views: 1776

Re: Simple Blade Calculator

Hi Innovo. I wrote the PHP code for that page, and it is based on some fairly complex aerodynamic formulas... I still have quite figured out how to apply the Reynold's number... Sure I could try and do something for water, but I guess the base formulas are completely different, due to the fact ...
by windgat
on Mon Feb 11, 2013 11:32 am
 
Forum: Blades and Hub
Topic: Simple Blade Calculator
Replies: 1
Views: 1451

Re: New propeller design

... efficient combination to use for generating electricity. Finally a comment about speed and power - they are not the same thing. So what matters is how hard the system can overcome resistance from the generator, not just how fast it can spin when there is no power being drawn from it. Hope some ...
by windgat
on Fri Jan 25, 2013 11:39 am
 
Forum: General
Topic: New propeller design
Replies: 3
Views: 3618

New propeller design

... Test 2: 6.1 - 42.6 Test 3: 3.6 - 33.6 Test 4: 5 - 30.8 Test 5: 3.6 - 26.4 Test 6: Test 7: Test 8: Do these values hold much water and if so how much. Please help if you can. Regards. OooWeh.
by OooWeh
on Sat Jan 19, 2013 1:56 pm
 
Forum: General
Topic: New propeller design
Replies: 3
Views: 3618

Re: SUPPLIERS WIND POWER GENERATOR

Knowing how to save the Earth, however, is not the same as actually doing it. Although we are gradually beginning to seriously develop alternative energy sources, the reality is that we have a very long way to go. You can choose ...
by sullie
on Mon Jul 18, 2011 12:45 am
 
Forum: General
Topic: SUPPLIERS WIND POWER GENERATOR
Replies: 4
Views: 6074

Re: Weird blades

Yes - large surface area, therefore high torque slow speed. Also note how the blades are broader nearer the tip, the opposite to the usual aerodynamic design.
by windgat
on Sun Mar 06, 2011 10:20 am
 
Forum: Blades and Hub
Topic: Weird blades
Replies: 5
Views: 4148

Re: laws and restrictions

... radio mast is 9m, so perhaps best to stick to that, including the blade height. That makes for quite a tall pole - I would be interested to see how you intend to erect it, and what stays you plan on using. The force in a high wind can be very surprising - you need to make it strong!
by windgat
on Sun Dec 12, 2010 1:26 pm
 
Forum: By laws and restrictions
Topic: laws and restrictions
Replies: 3
Views: 6272

Re: How much power does a wind generator produce?

Hi there - sorry to post a possibly unrelated question! I am working with a new renewable energy magazine titled RenewerG and we would like to get in touch about a possible article/interview? Please feel free to delete this post afterwards :oops: I can be reached at catr at renewerg dot co dot za. T...
by Cat Robinson
on Wed Oct 27, 2010 4:20 pm
 
Forum: General
Topic: How much power does a wind generator produce?
Replies: 85
Views: 71200

How to use a rotor set

The rotor set is 2 large disks and 2 small disks. The holes are laser cut, and since this is not 100% accurate and can leave a small burr, they need to be drilled out to the correct size. The small disks are the same. ⋅ The 4 holes are designed to be used with 12mm bolts, and so should be ...
by windgat
on Sat Oct 23, 2010 10:58 am
 
Forum: Rotors and magnets
Topic: How to use a rotor set
Replies: 0
Views: 2084

Re: How to connect coils

Here is a diagram of how to connect the coils
by windgat
on Sat Oct 23, 2010 10:50 am
 
Forum: Stators and coils
Topic: How to connect coils
Replies: 4
Views: 5429
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