Wind Power Conversation

From Open Source Ecology
Jump to: navigation, search

Main > Energy > Wind energy

Windmill pitch adjustment mechanism from menelaos85 (Max)

From a Conversation, Jan. 2010:

[21:28:39] Marcin Jakubowski, Ph.D.: Ok, tell me more about the 6 KW generator

[21:32:27] menelaos85: the generator will consist of 15 coils and 20 magnet poles, each magnet 80x40x20 mm, 40 in total, resistance is about 3 ohms then, which gives an efficiancy of about 90 percent at nominal power of 6 KW, mere in lower power

Are you making everything open source?

[21:35:57] menelaos85: yes, i make it open source, of course...what a question ;-)

[21:35:28] menelaos85: Generator parts cost about 2000 euros

[21:36:33] Marcin Jakubowski, Ph.D.: Tower cost?

[21:36:37] menelaos85: the efficiency will be a lot more tham those machines on fieldlines. com or otherpower

[21:36:49] menelaos85: the tower will be 30 meters, made from streetlight posts [21:37:18] menelaos85: I have no idea about those costs as i only build the turbine and rotor, but i guess about 1000 to 1500 euros, and it will be free standing, no ropes or wires

[21:38:51] Marcin Jakubowski, Ph.D.: Do you know what grid intertie inverter you will use?

[21:39:09] menelaos85: windyboy 6000, market price is about 3000$

[21:40:52] Marcin Jakubowski, Ph.D.: Great. Are you making the blades?

[21:41:42] menelaos85: they are ready made and cheap to buy, quite common here in germany, made by a german professor of wind egeneering -

[21:43:59] menelaos85: its about 50$ per meter

[21:44:38] menelaos85: I have a calculation program for especially this profile

[21:48:53] Marcin Jakubowski, Ph.D.: What do you do for high winds?

see picture for blade tilt mechanism

[21:51:31] menelaos85: It's all pure mechanics

[21:52:12] Marcin Jakubowski, Ph.D.: Is it reliable for dealing with high winds?

[21:52:25] menelaos85: Very, but not easy to calculate and build, and will take some time to make it work precisely

[22:06:05] Marcin Jakubowski, Ph.D.: If you are at 300+ volts, will Windy Boy 6000 handle that voltage?

[22:06:14] menelaos85: Yes, operating voltage is between 260 and 600V. Anyway...i will post all the details on the internet, so anybody can reproduce it

[22:09:42] Marcin Jakubowski, Ph.D.: Yes. If you do a good job, that can be a major contribution to humanity.

[22:10:14] menelaos85: i like the idea of people having the opportunity to get free knoledge

[22:11:07] Marcin Jakubowski, Ph.D.: If you complete this and it works well , I would like to replicate the design here.

[22:11:26] menelaos85: lets see how it works

[22:11:49] menelaos85: it basically is not much different from the machines

[22:11:50] Marcin Jakubowski, Ph.D.: It looks like $2500 in generator materials, $1500 in blade materials, $1500 in tower, $3000 in inverter - or about $1.5/peak watt if you don't count labor.

[22:12:07] menelaos85: the highligt is the pitch regulation of the turbine

See last project:

[22:35:58] menelaos85:

[22:36:02] menelaos85: Menelaos...thats me. The 6 kw project will be here: [22:36:26] menelaos85:

[22:36:37] menelaos85: The last one was 2 m in diameter only, but is working exactly as calculated

[22:37:41] menelaos85: Pictures are on the last few pages

[22:38:26] menelaos85:

[22:39:04] menelaos85: starts charging batteries at 2.5 m/s

[22:39:12] menelaos85: i calculated 2.6 :-)