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| solar distillation http://byap.backyardmagazines.com/forum/viewtopic.php?f=5&t=2185 |
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| Author: | timmy [ Oct 6th, '07, 08:10 ] |
| Post subject: | solar distillation |
does anyone have any calculations on how much solar heat a given sheet of glass can trap? i'm thinking of having a go at making a glass still and using a combination of the sun's heat and vacuum (lowers the required boiling temp) to distill high quality spirits the reason this would produce a fine drinking alcohol is the lack of direct heat means no burnt particles in the mash. I believe in perth's 40c summers i could easily get the 78c required for distiallation at 1 atmosphere |
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| Author: | tamo42 [ Oct 6th, '07, 08:37 ] |
| Post subject: | |
Vaporizing water is easy in full sun. Even easier if you use reflectors. I don't know the numbers in terms of BTUs, but IIRC sunlight is 7.5kW/m^2 at the Earth's surface. |
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| Author: | creative1 [ Oct 6th, '07, 09:21 ] |
| Post subject: | |
and you only need the differencial of 2 degs to get condensation here is a link http://www.solaqua.com/solstilbas.html http://nariphaltan.virtualave.net/ethanoldist.pdf |
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| Author: | timmy [ Oct 6th, '07, 09:32 ] |
| Post subject: | Re: solar distillation |
another thing about the solar is more of the good flavour will make it through |
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| Author: | cfuse [ Nov 25th, '07, 22:14 ] |
| Post subject: | Re: solar distillation |
timmy wrote: I believe in perth's 40c summers i could easily get the 78c required for distiallation at 1 atmosphere
Whilst this is entirely possible, it remains to be seen as to whether it is something that you would actually want to do. My reservations about this method would be the fact that it is so hard to control. Reliable and consistent results would be impossible. As fractional distillation is based on the differing vaporisation points of the various components of the mixture being distilled this is a big deal. Fusels (the unpleasant flavours) and methanol (the hangover) have different distillation points to ethanol, thus the key to good distillation is to maximise ethanol extraction whilst minimising unwanted products getting into the distillate. I don't really see how you could do that without temperature control. |
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| Author: | Sleepe [ Nov 26th, '07, 07:30 ] |
| Post subject: | |
Cfuse Thought it was the length of the fraction distilling column above the mash and control of the temp at the top of the column not the retort that determined what and when you get out. Must admit though if the mash is overheated, be a hard go 
And I'm sure Timmy meant distilling essential oils and could possibly heat water to transfer the heat to the retort 
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| Author: | steve [ Nov 26th, '07, 19:48 ] |
| Post subject: | |
yeh, but how do you control the temp at the top of the column if you cant control the temp of the mash? obviously the cooling jacket flow can be used but would need some automated control fi solar was being used......... |
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| Author: | Sleepe [ Nov 27th, '07, 05:41 ] |
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Steve temp of the mash controlled by placing retort in water bath and heating water bath not retort. Timmy link http://homedistiller.org/refluxdesign.htm |
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| Author: | timmy [ Nov 27th, '07, 06:03 ] |
| Post subject: | |
cooling jacket, adjust as required. as long as a cloud doesn't some over you'd be fine |
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| Author: | dthawk [ Nov 27th, '07, 07:23 ] |
| Post subject: | |
Seems like a lot of trouble..... |
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| Author: | SlicerDicer [ Dec 2nd, '07, 01:12 ] |
| Post subject: | |
explosion hazard? |
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