Tiny Vertical Axis Wind Turbine (TiVA) - Versionsgeschichte

Andreas Plank: Hilfe:Kategorisieren von Seiten: ± 2 Kategorien mittels HotCat-Helferlein (s. Benutzereinstellungen); fix some math

2018-06-26T14:37:34Z

Hilfe:Kategorisieren von Seiten: ± 2 Kategorien mittels HotCat-Helferlein (s. Benutzereinstellungen); fix some math

Änderungen zeigen

Andreas Plank: +Displaytitle

2018-05-30T12:42:45Z

+Displaytitle

Andreas Plank: Andreas Plank verschob die Seite TiVA nach Tiny Vertical Axis Wind Turbine (TiVA): a self explaining URL rather than an abbreviation that is known only to specialists ;-)

2018-05-30T12:41:28Z

Andreas Plank verschob die Seite TiVA nach Tiny Vertical Axis Wind Turbine (TiVA): a self explaining URL rather than an abbreviation that is known only to specialists ;-)

Timonizer am 21. Februar 2016 um 02:53 Uhr

2016-02-21T02:53:28Z

Shure: m

2014-03-12T10:47:38Z

Shure: /* Introduction */

2013-06-02T23:51:37Z

Introduction

Shure am 21. Mai 2013 um 15:36 Uhr

2013-05-21T15:36:31Z

Shure: /* Prototyping */

2013-05-21T00:13:38Z

Prototyping

Shure: /* Appendix */

2013-04-06T20:15:14Z

Appendix

Shure: /* TiVA applications */

2013-04-06T20:14:57Z

TiVA applications

← Abfassung vorher		Version vom 30. Mai 2018, 12:42 Uhr
Zeile 1:		Zeile 1:
		+	{{DISPLAYTITLE:'''Ti'''ny '''V'''ertical '''A'''xis Wind Turbine (TiVA)}}
	[[File:Project-icon_tiva_wikithumb_h400px.png\|350px]]		[[File:Project-icon_tiva_wikithumb_h400px.png\|350px]]

← Abfassung vorher		Version vom 21. Februar 2016, 02:53 Uhr
Zeile 1:		Zeile 1:
		+	[[File:Project-icon_tiva_wikithumb_h400px.png\|350px]]
		+
		+
	==Introduction==		==Introduction==
	The '''Ti'''ny '''V'''ertical '''A'''xis Wind Turbine is a wind energy harvesting and testing platform for anybody. All information is released open source and for free, for a better world and for the fun of open collaboration. (CC BY-SA)		The '''Ti'''ny '''V'''ertical '''A'''xis Wind Turbine is a wind energy harvesting and testing platform for anybody. All information is released open source and for free, for a better world and for the fun of open collaboration. (CC BY-SA)

@@ Zeile 297: / Zeile 297: @@
 <math>\rho_{overall}=0.25*0.75*0.98*0.85=0.16</math>
-Conclusion: A 0.32 x 0.32 drag-only VAWT generates about P_{mech} = 0.1...10 W and in average German wind conditions (3 - 4 m/s??) about 0.5 - 1 W. If we have a good alternator (which will be easier at this size because of the high rpm) and a synchronous rectifier (rectifier not necessary if buck/boost power supply doesn't need DC, are there suitable packages for this mode?), most of the power will be available as an input for a buck/boost converter, which can operate reasonably well at these small power ratings.
+Conclusion: A 0.32m x 0.32m drag-only VAWT generates about P_{mech} = 0.1...10 W and in average German wind conditions (3 - 4 m/s?) about 0.5 - 1 W. If we have a good alternator (which will be easier at this size because of the high rpm) and a synchronous rectifier (rectifier not necessary if buck/boost power supply doesn't need DC, are there suitable packages for this mode?), most of the power will be available as an input for a buck/boost converter, which can operate reasonably well at these small power ratings.
 Assuming a worst-case average electrical power of 1 W after rectifying and regulating, one can still charge a cheap 4-pack of NiCd/NiMH (4 x 1.3 V = 5.2 V) which provides power for the system and for high power demands, e.g. activating the LED pattern at night. Charging all of the cells with 1 W from 0 % to 100 % takes (4 * 4 Wh) / 1 W = 16 h. At a wind speed of 8 m/s = 28,8 km/h and P_{el} = 48 W * 0.16 = 7.68 W, the batteries will be fully charged in just  (4 * 4 Wh) / 7.68 W = 2 h 5 min.

@@ Zeile 1: / Zeile 1: @@
 ==Introduction==
-Part of the modular [[Wind Turbine]] system is a downscaled VAWT called [[TiVA]] with tiny dimensions. With these inexpensive, small prototypes we can have a fast prototyping and research pace. Any successful design approaches may then be scaled up and used at larger turbines.
+The '''Ti'''ny '''V'''ertical '''A'''xis Wind Turbine is a wind energy harvesting and testing platform for anybody. All information is released open source and for free, for a better world and for the fun of open collaboration. (CC BY-SA)
-The '''Ti'''ny '''V'''ertical '''A'''xis Wind Turbine is a general prototype model and testing platform for a larger wind turbine, and also the prototype for the Apollo-NG Zephyr Wind-Park Construction Kit. [[TiVA]] and [[Wind Turbine]] specifications started with a joint development venture between [http://www.etemu.com etemu.com] and [http://apollo.open-resource.org Apollo-NG]. All information is released open source and for free, for a better world and for the fun of open collaboration. (CC BY-SA)
+Part of the modular [[Wind Turbine]] system is a downscaled VAWT called [[TiVA]] with tiny dimensions. With these inexpensive, small prototypes we can have a fast prototyping and research pace. Any successful design approaches may then be scaled up and used at larger turbines. [[TiVA]] is also a prototyping platform for educational purposes: Students, teachers, hackers and anybody with interest in the topic can learn and tinker with renewable energy harvesting in a small scale.
 ==Status==

@@ Zeile 10: / Zeile 10: @@
 ==Prototyping==
 We are gathering the resources for the first prototypes, here is a rough bill of materials for a first prototype: [[Media:Tiva_bom_prototype_p1.pdf]].
 TODO: post a list with all the parts needed for one TiVA.
@@ Zeile 19: / Zeile 17: @@
 rotor type models and mechanics to analyze stress points in the
 mechanics and to optimize the rotors performance.
 ===YOU===
-Yea, YOU! Is there anything you can supply or contribute? Please get in touch with [[Alex Shure|Alex]] or make a post in our Forum. :-)
+Is there anything you can supply or contribute? Please get in touch with [[Alex Shure|Alex]] or make a post in our Forum. :-)
 ''Funding with parts or money is very welcome!''

@@ Zeile 15: / Zeile 15: @@
 TODO: post a list with all the parts needed for one TiVA.
-NICE TO HAVE and still searching for this project:
+Still searching for this project:
 Someone with the ability to establish FEM simulations of different
 rotor type models and mechanics to analyze stress points in the
@@ Zeile 27: / Zeile 27: @@
 ===YOU===
-Yea, YOU! Please add yourself to this list if you have anything you can supply or want to contribute. Posts may be in English or German. Link to your profile or drop [[Alex Shure|Alex]] a line with your E-Mail, so we can get back to you if we need anything. :-)
+Yea, YOU! Is there anything you can supply or contribute? Please get in touch with [[Alex Shure|Alex]] or make a post in our Forum. :-)
 ''Funding with parts or money is very welcome!''

← Abfassung vorher		Version vom 6. April 2013, 20:15 Uhr
Zeile 375:		Zeile 375:

	==Appendix==		==Appendix==
−	This wiki entry evolved from a pad at apollo.open-resource.org with [[chrono]] & [[Alex]]~~. We try to keep Apollo's wiki and this OSE wiki entry synchronized, however, there might be variations or recent additions on either platform~~.	+	This wiki entry evolved from a pad at apollo.open-resource.org with [[chrono]] & [[Alex]].

← Abfassung vorher		Version vom 6. April 2013, 20:14 Uhr
Zeile 373:		Zeile 373:

	Replacing a diode with an actively controlled switching element such as a MOSFET is the heart of active rectification. MOSFETs have a constant very low resistance when conducting, known as on-resistance (RDS(on)). They can be made with an on-resistance as low as 10 mO or even lower. The voltage drop across the transistor is then much lower, meaning a reduction in power loss and a gain in efficiency.		Replacing a diode with an actively controlled switching element such as a MOSFET is the heart of active rectification. MOSFETs have a constant very low resistance when conducting, known as on-resistance (RDS(on)). They can be made with an on-resistance as low as 10 mO or even lower. The voltage drop across the transistor is then much lower, meaning a reduction in power loss and a gain in efficiency.
−
−	~~==TiVA applications==~~
−	I would like to deploy 1-3 of these tiny turbines at a nearby off-grid mountain bike downhill track. I hope to gain the interest for renewable energy / wind turbines of any passenger who rides or cheers there at a race. --[[User:Alex Shure\|Alex Shure]] 13:31, 3 April 2012 (CEST)

	==Appendix==		==Appendix==