Aquaponics Digest - Sat 02/27/99
Message 1: Re: Mosquito Control
from KLOTTTRUE
Message 2: Re: Mosquito Control
from "Ted Ground"
Message 3: Re: mail systems help/twins
from "Dale Robinson"
Message 4: Re: mail systems help
from PattyRagen
Message 5: My Solar Air Conditioner
from Michael Strates
Message 6: Re: Mosquito Control
from donald trotter
Message 7: RE: catalogue
from Andrew
Message 8: Graywate /Wetlands/ EcoEngineering
from "Ted Ground"
Message 9: Re: Mosquito Control
from KLOTTTRUE
Message 10: Re: My Solar Air Conditioner
from KLOTTTRUE
Message 11: Re: Mosquito Control
from KLOTTTRUE
Message 12: Re: My Solar Air Conditioner
from "Ted Ground"
Message 13: Test for URL
from "Dale Robinson"
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Subject: Re: Mosquito Control
From: KLOTTTRUE
Date: Sat, 27 Feb 1999 05:49:30 EST
Good morning,Does any one have any tips on eliminating Mosquitos in a
greenhouse? Thanks Ken
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Subject: Re: Mosquito Control
From: "Ted Ground"
Date: Sat, 27 Feb 1999 11:13:32 -0600
Ken,
I assume the source of the mosquitos are larvae which are deposited in
standing water inside the greenhouse, then the adults emerge. If so, then
can we assume that this standing water inside the greenhouse has no fish or
other organisms to consume the mosquito larvae? Ergo and 2wit, what is
that stuff doing in your greenhouse without it moving around and growing
you some fish, Mr. Ken?
Any way, you can try stocking cattle tanks or other standing water bodies
with Gambusia affinis, the mosquito fish. They look a bit like the black
mollies that you can buy at the pet store, except they are lighter color,
and you can probably find them in nearby ponds or creeks there in jawga.
They get no larger than the size of a small minnow, but they are voracious
when it comes to aquatic dipteran larvae such as mosquitos, etc.
Also, there is a floating cake that one can place in water gardens that
releases a variety of Bacillus thuringeniensis var. israelensis, which will
kill the aquatic dipteran larvae in the water, but not harm fish or higher
animals.
Good luck.
Ted
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| Message 3 |
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Subject: Re: mail systems help/twins
From: "Dale Robinson"
Date: Sat, 27 Feb 1999 12:46:37 -0600
I belong to the worm forum list and the hydro list. You can join these from
my web site links page.
Best regards
Dale Robinson
prof-robinson@worldnet.att.net
http//home.att.net/~prof-robinson/page7.html
Dale's links
This is also a test to see if the second address comes back to me as html or
as typed.
Perhaps I should check my format or something.
-----Original Message-----
From: Susanne Machler
To: aquaponics@townsqr.com
>Jorg, (and others) I have seen your tag(s) on more than one list, and
>you too Mike (AU) on the solar list.Would you mind sharing some of the
>other list you/ anybody find worthwhile recommending, I am also on the
>solar cooking list and 4 at CREST.org,
>
>Any others worthwhile tht fall into the greener shades of life?
>Tah, anyone...
>
>Sue.
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Subject: Re: mail systems help
From: PattyRagen
Date: Sat, 27 Feb 1999 15:02:54 EST
I agree with Ken about unnecessary attachments. I begun deleting the
attachments to save time and energy.
PattyRagen
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Subject: My Solar Air Conditioner
From: Michael Strates
Date: Sun, 28 Feb 1999 18:08:47 +1100 (EST)
Howdy...
I'm attempting to develop a very basic solar airconditioner/dehumidifier.
While I know that this is probably a 'lil off topic, I thought it would be
interesting to some.
=====
Propylene glycol passes through several collectors, and at a temperature
of over 40C it runs through a long line of condensers mounted in a pipe.
This pipe is placed on a 45 degree angle.
Around six more feet down the pipe there is an extreemly large condenser
coil mounted, which actually spans another six feet looping and twisting
down the pipe. Propylene glycol passes from this down four feet under the
ground underneath my house, and cools the hot air down quite rapidly to
around 5 degrees below ambient.
The evaporated water from the two condenser phases drips down the pipe and
is pumped OUTSIDE where it runs down a very large (4x4ft) aspen wood
"wall" where it evaporates quite quickly into a humidibox, which is
basically a large plastic box which is allowed to get very humid inside.
While the water is evaporating, the remaining water in the drip tank gets
very cold (sometimes as low as about 6C). This is passed through a second
condenser coil in a pipe going to a large blower and into the room. The
temperature should be around 23C on a 35C day.
A large condenser with glycol coming from the solar collectors passes into
the humidibox creating the "hot/dry" conditions which evaporative coolers
favour. Water exits the humidibox from a small drip outlet in the bottom
and flows into the main drip tank" to be recycled.
Inside the "drip tank" the water is helped to cool by a small immersed
condenser which recirculates the glycol coming from under the ground. On a
recent temperature check, after spending 3 mins under the ground on a
35 degree day, the glycol was close to 17C.
The blower I'm talking about isn't really a blower, but a "sucker" as it
draws the air from inside and pumps it back inside just like a normal air
conditioner would.
I'd appreciate anyones comments.
===
--
e-mail: mstrates@croftj.net www: http://www.croftj.net/~mstrates
See keyservers for PGP info. Linux! The OS of my Choice!
"Once you have flown, you will walk the earth with your eyes turned
skyward, for there you have been, and there you long to return."
- Leonardo da Vinci, and below an extract from John Fogerty's song:
Hey, Tonight - Gonna be tonight- Don't you know I'm flyin'- Tonight
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Subject: Re: Mosquito Control
From: donald trotter
Date: Sat, 27 Feb 1999 13:03:03 -0800
>Good morning,Does any one have any tips on eliminating Mosquitos in a
>greenhouse? Thanks Ken
Bacillus thuringiensis strain: israeliensis
Donald Trotter
The Organic Resource Centre
295 Neptune Ave.
Encinitas, CA. 92024
curly@mill.net
fax- 760.632.8175
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Subject: RE: catalogue
From: Andrew
Date: Sat, 27 Feb 1999 08:34:28 +1030
[Andrew] Please send a catalogue to:
Aquaculture Advantage
P.O.Box 582
Two Wells
South Australia
Australia
We import from the States monthly.
Regards
Andrew de Dezsery
General manager
[Andrew]
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Subject: Graywate /Wetlands/ EcoEngineering
From: "Ted Ground"
Date: Sat, 27 Feb 1999 18:32:15 -0600
Jorg,
Here are some useful references related to using graywater on the landscape
Gray Water Use In the Landscape by Rober Kourik 1988 28 pp. ISBN
0-9615848-1-5
$6 postpaid Metamorphic Press, P.O. Box 1841, Santa Rosa, CA 95402 phone
707 874 2606.
Here are some related resources:
Constructed Wetlands (and Aquatic Plant Systems for Municipal Wastewater
Treatment- EPA Design Manual) 1988. 83 pp. EPA /625/1-88/022. Free. EPA
Publications & Information Center P.O. Box 42419, Cincinnati, OH 45242.
phone 513 569-7597.
National Small Flows Clearinghouse produces a technical quarterly called
Small Flows, and it has or had a computer bulletin board (BBS). It
provides technical assistance with alternative wastewater systems and
small-community systems.
National Small Flows Clearinghouse West Virginia University, P.O Box 6064,
Morgantown, WV 26506-6064; 800 624-8301.
ORENCO 2826 Colonial Road, Roseburg, OR 97470 phone 503-673-0165. Provides
intermittent sand filters and other technology to custom-design septic tank
systems and other wastewater systems in difficult or unusual sites such as
slopes, shallow soils, clays, yada, yada.
For the truly devoted, who want to know the what where and why,
check out
Wastewater Engineering by Metcalf and Eddy 1981, McGraw-Hill
and
Ecological Engineering for Wastewater Treatment C. Etnier & B. Gutersom,
Editors 1994 Lewis Publishers.
Ted.
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Subject: Re: Mosquito Control
From: KLOTTTRUE
Date: Sat, 27 Feb 1999 21:45:43 EST
Howdy, Ted you're dead on,I've got lots of standing water in the greenhouse,no
fish yet trying to get the system fine tuned before I add the fins.Does that
floating cake have a Stage name,I can't even spell that three dollar word,and
Im looking at it.Where would a person find something like that cake? Is that
something I should have in with the fish? or will they eat the larvae? Also
I've been reading about those Gambusia minnows.I was wondering if I could
raise them for sale here locally? But I'm not sure their big enough. Here in
Georgia,the Mosquito is our state bird.Really! You believe that don't you?
Country Boys don't lie. If I tell you a Mosquito can carry a bale of hay,you
just clear out a place for him to put it.Thanks Ted
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Subject: Re: My Solar Air Conditioner
From: KLOTTTRUE
Date: Sat, 27 Feb 1999 22:08:05 EST
Hi,Michael are you building this Solar Airconditioner for your house or your
greenhouse? Ken
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Subject: Re: Mosquito Control
From: KLOTTTRUE
Date: Sat, 27 Feb 1999 22:11:31 EST
Thanks Donald Ken
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Subject: Re: My Solar Air Conditioner
From: "Ted Ground"
Date: Sat, 27 Feb 1999 21:19:46 -0600
G'day Michael.
Interesting design. I don't think solar-powered cooling is off topic
because
aquaponic greenhouses are environmentally controlled to the best degree
that we can accomplish that. Since evaporative cooling is usually a big
part of greenhouse environmental control, then, if there is a better way to
cool, I am all for it. Especially here in Texas.
When people ask me how long I have been interested in aquaponics, I always
point to a couple of publications that got me interested in aquaponics as a
wide eyed idealist longhair way back in 1968 through 75 or 1976. That was
the Whole Earth Catalog, and later the Energy Primer, both from the Portola
Institute. The Energy Primer is about renewable forms of energy. I still
have it, dog eared, somewhat tattered, torn, and yellowing, to this day.
In it, there are some very dated references to solar cooling, but maybe it
still has something to say for us.
The following may be way out there for your application , but would it be
feasible for you to use an ammonia/water absorption air conditioner?
Selective coatings onto aluminum or copper collectors can give a solar
absorptivity as high as 0.93 and a thermal emissivity as low as 0.06. This
is a nickel-black type of coating and used on galvanized iron solar wate
heaters in Israel. NASA has put out a number of publications and tech
transfers on their selective coatings techniques.
The selective coatings that are available today make possible fairly
efficient collector operation at the 200-240 F temperatures required by
absorption air conditioners.
In the ammonia water absorption system, the ammonia is the refrigerant and
the water is the absorber. When the water is heated under high presure, it
will give off the ammonia as a gas. The ammonia can then be condensed back
to liquid form and allowed to expand through a valve, where some of the
ammonia will evaporate and cool down the rest of it.
This form of absorption refrigeration has been very widely used, with low
pressure steam as the heat source. The only mechanical work involved is
the power needed to run a small pump to raise the presure of the
ammonia-water. This system, being under pressure, would likely fall under
the scrutiny of building codes, and the whole mechanical apparatus would
likely be outdoors, separate from your house or greenhouse, as the case may
be. Also, ammonia pretty toxic, so precautions must be taken in design and
operation. The chilled fluid which results from this system is cold water,
which is routed indoors and used to cool air.
There is a book out that I have not had the chance to read, but it sounds
inviting.
"The Next Great Thing: The Sun, the Stirling Engine, and the Drive to
Change the World" by Mark Shelton, which is about a dude named William
Beale, who has spent the last 20 years planning and building what he
belives is the answer to fossil fuels: the Stirling engine. Beale claims
that a 170 acre complex of Stirling engines could produce enough
"pollution-free" energy for the entire United States. This was published
by Norton in 1994, 272 pages, $25.00 US. So maybe a Stirling engine could
operate an ammonia-water absorption refrigeration unit for cooling homes
and greenhouses????
One modification of the simple evaporative cooler has been developed in
Australia, and given the name "Rock Bed Regenerative Air Cooler (RBR)",
which you may be aware of. (Was this developed by CSIRO in Australia????)
The system uses 2 beds of rocks, set side-by-side and separated by an air
spance in which a damper is located. Water sprays are mounted close to the
inner surface of each bed of rocks, and 2 fans are used. The outdoor air
is drawn into 1 of the rock beds, which has just been evaporatively cooled,
while the rock bed on the opposite side is undergoing evaporative cooling
by having the indoor air flow through it on its way outward to the
atmosphere. At the beginning of each cycle, water is sprayed into the rock
bed for 10 to 15 seconds, thoroughly saturating the rocks. The air from
the house, or greenhouse, blowing through the rock bed, evaporates the
moisture away from the rocks, and thereby cools them and the air,
increasing the humidity of the air as well. This does no harm, since the
air simply goes back to the outside atmosphere. On the other side of the
system, air is being drawn into the house through rock which have just been
cooled. Only a very small amount of moisture is added to the air since it
is the rocks which have been cooled, and the only moisture remianing is the
small amount which adheres to the surface of the rocks.
Types of this system have been built in the USA, I think- by folks at the
solar energy laboratory at the University of Arizona. The amount of
electrical power used in such a system is only about 10% of that used by a
mechanical refrigeration system, and the amount of water needed is very
small. The evaporation of 1.5 gallons of water per hour is equivalent to 1
ton of refrigeration, and the cost of the water is negligible by
comparison.
Some sources for this topic include:
The Solar Energy Laboratory, University of Florida, Gainesville, Florida,
32601. They can supply reprints of many of their reports, including work
on solar refrigeration.
The American Society of Heating Refrigerating and Air Conditioning
Engineers (ASHRAE) 345 E. 47th. St., New York, NY 10017, may have some
papers on solar refrigeration, but I am not sure about that.
and there is the NASA Technology Utilization Office, Marshall Space Flight
Center Code A&PS-TU Marshall Space Flight Center, Alabama, 35812. They have
stuff on Practical Solar Energy heating and cooling systems.
Hope this helps.
Ted.
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Subject: Test for URL
From: "Dale Robinson"
Date: Sat, 27 Feb 1999 14:09:26 -0600
>prof-robinson@worldnet.att.net
http//home.att.net/~prof-robinson/page7.html
Dale's links
This is a test to see if the second address comes back to me as html or
as typed.
I changed my settings to out going as html. If this don't work, can
somebody suggest what else I can do? I would like to make it easier for
people on this list to get to my web site links page. It has a lot of good
information for beginners in hydroponics and aquaculture.
S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
Web page http://www.townsqr.com/snsaqua/
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