Posted by Ulysses on April 6, 2009, 2:54 pm
I don't know much about algae but if I fill a bottle with my well water and
leave it in the sun it will either turn red or green. I assume that means
there are two different types in my water and for some reason one will
prevail, I guess according to the conditions. I don't understand why you
suggest a 20 mile radius. Before learning how to analyze algae for sugar or
oils I think I need to let out the steam--brain can only do so much at one
Posted by Curbie on April 7, 2009, 3:27 am
Just a short explanation (as I understand it):
1) Water is the medium in which YOU want the algae to grow.
2) By adding nutrients to the growth medium you are basically
creating a party environment for algae.
3) The types and ratios of nutrients dictate what stains of algae
is invited to the party.
4) By tailoring the nutrients for sugar or oil strains you can
see if you can capture a likely strain in your area.
I would image the red and green are two strains each does better in
slight differences the natural nutrients of your well water. From my
understanding only slight nutrients differences can dictate what algae
is invited to the party. All tests require exact measurement of
nutrients ratios and you to test (and log) all combinations.
You do understand that electricity from solar thermal on a small scale
is a long shot AND even using on hands-on experiment approach this
will require a good deal a math AND you would be probably headed down
a long and un-clear path?
I would have personal problems in helping you with boiler/receiver
units UNTIL you could demonstrate a through grasp of heat collection
for your location, in my opinion, there is no need to monkey around
with the dangers of steam temperatures or pressures until you
understand parabolics and the rough size of the collector you need to
This knowledge coupled with a general idea of the collector
design/cost could kill your enthusiasm for the whole idea. As I said
in another post a 20' collector may only net you 2 usable hp 5-6 hours
If you are a good "scrounger" you could use mirrors but at the end of
the day, I'm not sure how much money you'd save over a sheet metal and
reflective film design. The NREL designed reflective film for this
purpose can ordered here:
although this film reflective film has little better solar
reflectivity than "general purpose" reflective films it's main
advantage in my opinion is performance stability over time (less
maintenance). But for a model for testing purposes, in my opinion,
shouldn't need anymore than a couple of years, so there are real cheap
"general purpose" reflective films that won't last too long but are
way cheaper and probably good enough for modeling and testing. The
$.00 per square foot film should be used for design/cost and
production in my opinion.
Posted by Ulysses on April 7, 2009, 4:50 pm
Well, I'm 56 years old and still have all of my fingers and head parts and
I've done a lot of things. I'm not a boilermaker but I'm aware of the
potential hazards and am confident that I could produce steam without
killing my self otherwise I wouldn't even be discussing it. You mentioned
in another thread "taking a different approach" and that's what I tend to
do. Sometimes when something is considered impossible or impractical it may
simply be under a certain set of circumstances. Several people who's
opinions I respect have told me that I'm pretty much wasting my time messing
around with steam however I keep coming back to it as a likely solution to
my electricity needs. From my current point of view the main factor is what
kind of motor would be the most suitable. Making steam doesn't seem to be
very difficult. Perhaps I'm just not understanding just how hot and how
much pressure we are talking about. In a simple experiment I produced about
80 psi in a short time using very little water and not all that much heat.
I know that 80 psi can run an air tool and produce over 50 volts at
somewhere around 1-2 amps. I don't think I necessarily need to produce 1200
degrees F or hundreds of psi just to make one HP.
2 HP will work for me.
I usually experiment with whatever is laying around and if it looks
promising enough I build with the best materials that I can get.
Posted by Don T on April 7, 2009, 6:59 pm
Air motors depend on _volume_ of air at a specific pressure to produce
their rated torque. It isn't pressure that you need to work on so much as
sustained volume. To produce a constany high volume of steam requires large
quantities of "instantaneous" heat, i.e. at any given instant you must
provide an equal amount of heat into the system as you are removing from the
system in the form of steam.
Stolen from Dan: "Just thinking, besides, I watched 2 dogs mating once,
and that makes me an expert. "
There is nothing more frightening than active ignorance.
It is a worthy thing to fight for one's freedom;
it is another sight finer to fight for another man's.
Posted by Curbie on April 7, 2009, 9:05 pm
A point that is true in my opinion for any heat operated device (Air,
Steam, Striling) hopefully your explanation will be easier to
understand than the one I been using for a bunch these threads. I
don't care what kind of heat operated device you choose, VOLUME of
heat collected is the key.