portable_off-grid_power
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
portable_off-grid_power [2019/04/14 17:26] admin [Choices] |
portable_off-grid_power [2019/05/15 08:58] admin [Choices] |
||
|---|---|---|---|
| Line 71: | Line 71: | ||
| Wind seems to be the least developed option, but it also has the most potential. 8mm aluminium tent poles weigh 100g/m, the above generator is 360g, so there's scope at about 1.5kg. | Wind seems to be the least developed option, but it also has the most potential. 8mm aluminium tent poles weigh 100g/m, the above generator is 360g, so there's scope at about 1.5kg. | ||
| - | Most commercial wind generation is designed to be permanent and have a lot of storage, so it operates best at the average wind speed. That's not what we want here, we want some power at low wind speeds and not to break at high wind speeds. | + | Most commercial wind generation is designed to be permanent, have a lot of storage and operate best at the average and high wind speeds (power as V<sup>2</sup> biasses towards high speeds). That's not what we want here, we want some power at low wind speeds and not to break at high wind speeds. Moreover, varying the pitch of the blades by anything other than bending/stretching is too complex. |
| - | https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.mdpi.com/1996-1073/5/9/3425/pdf&ved=2ahUKEwiq7pPQhdDhAhVsSxUIHUidBFYQFjAKegQICBAB&usg=AOvVaw0NYEVC2SpS-ubTC5YXg9ag&cshid=1555261057577 | + | |
| + | This [[https://www.mdpi.com/1996-1073/5/9/3425/pdf|publication]] gives the basics of wind turbine designs and is well worth reading. | ||
| == Vertical Axis == | == Vertical Axis == | ||
| Line 88: | Line 89: | ||
| Small (100W to 400W) generators are common for marine and camping use, but these come in at about 10kg and so are too heavy. [[https://www.texenergy.com/products/infinite-air|Infinite Air]] is light at 626g, but [[http://www.oe-mag.co.uk/portfolio/tex-energy-infinite-air-flex-3|not powerful enough]]. | Small (100W to 400W) generators are common for marine and camping use, but these come in at about 10kg and so are too heavy. [[https://www.texenergy.com/products/infinite-air|Infinite Air]] is light at 626g, but [[http://www.oe-mag.co.uk/portfolio/tex-energy-infinite-air-flex-3|not powerful enough]]. | ||
| + | Others: | ||
| + | * https://hackaday.com/2017/03/18/micro-wind-turbine-for-hikers/ | ||
| + | * Failed startup: http://windpax.com | ||
| + | * https://www.thefabricator.com/article/shopmanagement/wind-energy-meets-the-sail | ||
| Line 103: | Line 108: | ||
| === Prototype === | === Prototype === | ||
| - | [[https://www.youtube.com/watch?v=E-NbdIcuoFQ|YouTube video]] | + | {{youtube>E-NbdIcuoFQ?medium}} |
| === What size? === | === What size? === | ||
| Line 129: | Line 134: | ||
| Overall it looks as though it'll come in just over the 1.6kg budget. Whether it'll generate useful power is the bigger question. | Overall it looks as though it'll come in just over the 1.6kg budget. Whether it'll generate useful power is the bigger question. | ||
| + | |||