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- Newsgroups: sci.environment
- Path: sparky!uunet!decwrl!csus.edu!netcom.com!netcomsv!iscnvx!rapnet!news
- From: babb@rapnet.sanders.lockheed.com (Scott Babb)
- Subject: Solar Fuel Alcohol (Was Re: Mary Jane has a great Biomass)
- Message-ID: <1992Aug26.135703.2733@Rapnet.Sanders.Lockheed.Com>
- Sender: news@Rapnet.Sanders.Lockheed.Com (USENET News System)
- Organization: Sanders Associates
- X-Newsreader: Tin 1.1 PL5
- References: <1992Aug25.212927.26591@bnr.ca>
- Date: Wed, 26 Aug 92 13:57:03 GMT
- Lines: 82
-
- Bruce Harlan (harlan@crchh347.bnr.ca) wrote:
- : A couple of points here... burning good corn fuel in cars is a sacrilege.
- : Burning poor corn fuel is not.
- :
- : [...]
- :
- : So- do we have any engineer-types that can dream up a cheap solar still?
- : Let's set some criteria:
- :
- : Must be feasible- all products must be available in the consumer market.
- : Must be inexpensive. The more "common" parts used, the better.
- : Must be simple. Something the Average Joe might be able to build in the
- : garage if A. Joe were reasonably mechanically inclined and somewhat
- : resourceful.
- :
- : No dream products or dream designs- gotta be functional.
- :
-
-
- I remember seeing a design for an extremely cheap, simple solar still
- somewhere. As I recall, it was very much like an insulated cold frame for
- gardening: (DANGER! ASCII graphics to follow!)
-
-
- ___
- Distillate Glass ---|#|
- Collector \ --- |#|
- \ \ --- |#|
- \ --- |#|
- Insulated \ --- |#|
- Wood Frame __\--- |#| Side view cutaway
- \ |#|U |#|
- \ |#| |#|
- \|#|__________________|#|
- <--South |######################|
- |----------------------|
-
- The inside of the insulated wood frame is lined with plastic. The mash
- mixture is dumped in the bottom of the still and the glass cover is closed.
- The sun shines through the glass and heats the mash mixture, evaporating
- the alcohol (which has a lower boiling point than water) which condenses
- on the glass cover and runs down the inside of the glass. When the
- distillate reaches the bottom of the glass, it drips off into a U-shaped
- collector tray which is angled to channel the distillate to one end of
- the still, where it runs out of the still into a container through a hose.
-
- It's a pretty simple design, and it doesn't have any moving parts other
- than the hinged glass cover. On the other hand, I think that the output
- isn't very high-grade, either. Perhaps the distillate could be used as
- input to a second stage still which ran at higher temperatures via the
- use of reflectors (or fresnel lenses or whatever) to obtain a higher-proof
- final output.
-
-
- Charles Van Duren (charlesv@aupair.cs.athabascau.ca) wrote:
- : bj368@cleveland.Freenet.Edu (Mike E. Romano) writes:
- :
- : [...]
- :
- : >Actually a similar situation exists with farm produced alcohol.
- : >Only 8 acres of corn or similar crop is sufficient to produce
- : >enough alcohol to power a car for a year of average use.
- :
- : Corn culture is very hard on the growing medium, and uses a great
- : deal of energy input. Not to mention distillation. Sort of like
- : building a machine which produces 1 gallon of fuel from an input of
- : 10 gallons.
-
- Depending on the malting process, the energy input to harvest corn
- for fuel alcohol production may not be as high as you think. You
- probably don't have to worry about removing the ears from the stalks.
- You may be able to just shred the entire plant and use the whole thing
- as input to your malter.
-
- How about grain or sugar beets? Corn isn't necessarily the best crop
- for the production of fuel alcohol.
-
- --
- Lockheed Sanders may disagree so these are solely the opinions of:
- Scott L. Babb - babb@rapnet.sanders.lockheed.com
- "We didn't inherit the Earth from our parents,
- we are borrowing it from our children."
-