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#Post#: 4145--------------------------------------------------
Passive Solar
DIR By: AGelbert
Date: November 30, 2015, 5:01 pm
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[center]
HTML https://www.youtube.com/watch?v=30ghnDOFbNQ&feature=player_embedded[/center]
[center]Couple Builds Greenhouse Around Home to Grow Food and
Keep Warm
HTML http://www.smile-day.net/wp-content/uploads/2011/12/Smiley-Thumbs-Up2.jpg<br
/>[/center]
HTML http://ecowatch.com/2015/11/30/greenhouse-around-home/
#Post#: 4212--------------------------------------------------
Re: Passive Solar
DIR By: AGelbert
Date: December 22, 2015, 5:13 pm
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[center]This glass sphere might revolutionize solar power on
Earth
HTML http://us.123rf.com/400wm/400/400/yayayoy/yayayoy1106/yayayoy110600019/9735563-smiling-sun-showing-thumb-up.jpg<br
/>[/center]
[center]
HTML http://themindunleashed.org/wp-content/uploads/2013/12/glass-sphereee.jpg[/center]
Great article and excellent video!
HTML http://www.freesmileys.org/emoticons/emoticon-object-102.gif
HTML http://themindunleashed.org/2013/12/glass-sphere-might-revolutionize-solar-power-earth.html
#Post#: 5678--------------------------------------------------
Re: Passive Solar
DIR By: AGelbert
Date: September 15, 2016, 4:14 pm
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[center]Cooking with Sunshine
HTML http://us.123rf.com/400wm/400/400/yayayoy/yayayoy1106/yayayoy110600019/9735563-smiling-sun-showing-thumb-up.jpg<br
/> - Saving More Than Energy [/center]
Did you now that a solar oven can cost as little as $5 and last
two years?
SCI stands for Solar Cookers International, a Sacramento, CA
non- profit organization that with the help of other aid groups
have trained more than 30,000 people in developing countries to
cook with the sun. They are spotlighted in this National
Geographic clip.
This amazing invention is a perfect solution to so many problems
that transcend simply saving energy.
In developing countries, women have to walk 2- 3 miles to get
firewood to cook with. Having this constant indoor pollution
burns their eyes and chokes their lungs. The solar oven puts an
end to these problems as well as deforestation.
Another truly life saving aspect of the solar oven: It can be
used as a sustainable way to purify water. If you heat water to
65 degrees Celsius (149 degrees Fahrenheit) you can pasteurize
it and make it safe to drink. See in the video how they created
a simple way to measure if the water has reached this
temperature.
One happy recipient says : "We are all amazed that a cardboard
box can cook!"
HTML http://www.clipartbest.com/cliparts/xig/ojx/xigojx6KT.png
--Bibi Farber
[center]
HTML https://youtu.be/Ofn7jqPDTeY[/center]
[center]
HTML https://mail.google.com/mail/u/0/#inbox/1572df6368c3636a
#Post#: 6285--------------------------------------------------
Re: Passive Solar
DIR By: AGelbert
Date: January 17, 2017, 5:32 pm
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[center]Aluminum Can Solar Heater by Lillyvilleky in
energy[/center]
--- Quote ---
> This is how I made an aluminum can solar heater!
--- End Quote ---
HTML http://www.instructables.com/id/Aluminum-Can-Solar-Heater/?ALLSTEPS
#Post#: 7745--------------------------------------------------
Re: Passive Solar
DIR By: AGelbert
Date: August 24, 2017, 1:10 pm
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[center]The most efficient way to heat water is with a vacuum
tube
HTML http://www.pic4ever.com/images/129fs238648.gif
[/center]
Agelbert NOTE: The most thermodynamically efficient way to heat
water is with a vacuum tube. WHY? Because a vacuum has no
thermal conductivity. You trap the heat and that heat tranfers
to the matter inside it as long as the sun is out. The tube
cracking hazard with these tubes is demonstrated in this video
and the surprising (i.e. using SAND! :o
HTML http://www.createaforum.com/gallery/renewablerevolution/3-141113185047.png)<br
/>solution is explained.
HTML http://www.createaforum.com/gallery/renewablerevolution/3-080515182559.png
By the way, vacuum tube solar water heating for homes is routine
in China where they use solar panel harvested electricity more
for other energy needs. Solar panel electricity is obviously
better used for other household electrical demands.
If we did not use electricty to heat our water in the USA, an
estimeted 30% LESS energy would be required on the grid! That is
a gob smacking amount of energy we unnecessarily waste each
year!
HTML http://www.createaforum.com/gallery/renewablerevolution/3-200714183312.bmp
Much of China is as far north as Canada, so please do not bring
up the "cold climate" excuse for not using this method. No
matter how cold it is outside, that cold cannot get to the solar
heated part of the vacuum tube because there is ZERO thermal
conductivity.
While it is true that air has low thermal conductivity, in
northern climates the air in the air tube type is being cooled
constantly, which counteracts the solar heat and causes
excessive cooling of the water at night. Consequently, air tubes
for heating water (note: they do work okay for heating house
air) are a bad idea for anything but tropical climates.
Metals are excellent thermal conductors, but they have the
electrolysis problem of corroding when dissimilar metals are in
contact, so a non-metal type material inside the vacuum tube is
preferable to a metal that contacts the copper water pipe
within.
[center]
HTML https://qats.com/cms/wp-content/uploads/2011/10/Thermal_Conductivity_Chart_1.png[/center]
[center]Thermal Conductivity Chart[/center]
The sand used in the video is VERY fine grained. The finer the
grain, the more heat you will be able to capture in it. Coarse
grained sand is useless.
Beyond aesthetic considerations, there is no valid reason
whatsoever for us to use electricity to heat our water in the
USA. Lazy human love of convenience and fossil fuel piggery are
selfish, but not scientifically valid, reasons. Have a nice day.
[center]
HTML https://youtu.be/G4NNrRLPsnI
HTML https://youtu.be/G4NNrRLPsnI[/center]
[center]
Evacuated Solar Tube Implosion Solar Water Heater Thermal
Storage [/center]
GREENPOWERSCIENCE
Published on Jun 5, 2016
Solar evacuated tubes are extremely efficient at transferring
sunlight to heat. This heat is then transferred to the material
inside. This video is for lower quality water heaters that may
experience rain water infiltration from poor designs. This is
also an efficient method for enhancing good designs enabling
solar thermal storage. If you use heated water in the morning
from a system like this, the standard fins may be a better
option. The thermal storage does last several hours.
#Post#: 7746--------------------------------------------------
Re: Passive Solar
DIR By: AGelbert
Date: August 24, 2017, 1:52 pm
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[center]Top Solar Ovens[/center]
[center]
HTML https://youtu.be/hDox7M2s310[/center]
Agelbert Note: Check out the Rand-Solar cooker.
HTML http://www.pic4ever.com/images/19.gif
It's the same vacuum tybe
technology used for water heaters, but for cooking anything you
wish to cook!
HTML http://renewablerevolution.createaforum.com/gallery/renewablerevolution/3-020617175335.png
[center]
HTML https://youtu.be/v9KbQfg1SWU[/center]
Here's another brand with more bells and whistles:
[center]
HTML https://youtu.be/0Zrxccny0iA[/center]
Published on May 25, 2016
I cook lunch on my new GoSun Solar stove! This thing is
AMAZING!!
Buy yourself one at www.gosunstove.com
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