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solardan1959

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Reply with quote  #21 
Mario,
  Jeff brings up a point I did not think of till later.  Your walls heat up and provide a slow release of temp throughout the day and night.  You may get more heat than you think out of it.  One layer of regular fiberglass or aluminum screen would probably be better to allow this feature to continue to heat.  As he also said, it's hard to change you vent size so fans seem to be the way to go.  Check out bilge pump fans that run on dc and may fit right in those round holes. They should be pretty quite and can run by a small solar PV panel.
Dan

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Reply with quote  #22 
Hi, Everybody,

I have two large sun windows that get very hot & contribute a great deal to the house heating.  I read on the web that lots of folx turn these into enclosed loggias, or build a Trombe wall in them.

Before I get that far, I am toying with the idea of storing some of the energy during the day, so that I get the benefit later at night, watching the TV !  I have a couple of ideas, one being a forcing chamber.

If anybody is interested in taking a look, I'd be grateful for the feedback ! 

GH

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SolarInterested

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Reply with quote  #23 
George if there's room it might be easier just to have some containers of water (or some phase change material) in the room. From what I've read generally speaking you don't gain anything by putting a solar panel in a window space.
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Garage_Hermit

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Reply with quote  #24 
Hiya, Solar Interested !

Thanks for your response !

True, I guess there's nothing to be gained from using the window space, a kWh is a kWh !
I was just looking to prolong the usage time of the energy I absorb during the day !
The lounge is getting hot, while I am up in the office, I just want to use that heat once the sun has gone in...
In fact, I reckon I would not use sand, but slate chippings...
This looked like a cheap solution, but maybe you're  right, I should just install a 600-liter aquarium perhaps !

Bye for now,
Garage_Hermit




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Larry.S

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Reply with quote  #25 
I would like to fine a place where I could purchase supplies at a reasonable price. Also I find that different places call parts different names. Is there a general use dictinary .
solardan1959

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Reply with quote  #26 
Larry,
Here are some: http://www.builditsolar.com/References/supplierrefs.htm
but I find, as long as i know what it is called, a google seach is always a good place to start.  Sometimes we learn as we go and it always helps to know where the person we are talking to is from.  I am not aware of a translation dictionary for different parts.  If you are confused about a part/component try a google search or just ask.
Dan
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Reply with quote  #27 
Hi Scott,

Very nice job on the forum.  It will be a major improvement over the list serve.  That picture caught my attention.  Unfortunately, my solar projects are nil at the moment, but you never know...so I visit.

Scott

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Originally Posted by Scott Davis


Hi SolarFun,

Thanks for sharing your project plans with us!

Generally, the more air you have flowing through your collector, the more efficient it will be, so while throttling back may seem like a good idea, it is really counter productive in most cases.

Most of us use a snap switch that turns on at 110F and off at 90F, so first thing in the morning, it may cycle on and off a couple times until the sun gets fully on the panel, but from then on, it will run constant.

Be careful not to over think your design, especially to begin with.  If you do find you need to vary the speed, you can always modify your design later, but I'm betting you will be fine without.

If you really want to incorporate variability, here is how Scott in NY did it.  He actually used two fans, with the snap switch for the second in the output of the first.  Once the output of the first was high enough, the second fan kicked on.  Here is a picture:

What type of collector are you building.  You said all metal so maybe a backpass design?  if you have any pictures of your project, please add them to this thread!  We would love to see!
Scott Davis

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Reply with quote  #28 
Thanks Scott,

Yes, I still think your two fan setup is ingenious.  I love the elegant simplicity!

Thanks for your kind words on the forum.  Yes, I think it is the best way to keep our content more useful, available and organized going forward.


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solardan1959

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Reply with quote  #29 
From, Grateful Dead - St. Stephen
"one man gathers what another one spills"

Did a little bit of "gathering" today, found 6 nice pieces of single pane glass from the "Railroad Depot" museum today.  Use to be used for display cabinets,  4 4x4 pieces, (now 3, oops), and 2 26" X 50" pieces.  Should be able to make a couple of nice collectors with that.  It does have a slight green tint, do you think that means it has a high iron content?  Does not really matter I'll use it anyway.
Dan
Scott Davis

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Reply with quote  #30 
Great find Dan!  I'm looking forward to seeing the experiments they enable!
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