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Old 01-10-14, 06:44 PM   #1
nokiasixteth
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Default DIY solar hot air panel

I to have been working on a Solar heating project . But instead of for the shop it is actually for the home. Thanks to Ac hacker i found this spot here. Started today. Hope to be finished with the panel later tonight. Forgot tin screws. I am doing the one with screen. Not just an empty box.

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Old 01-13-14, 08:10 AM   #2
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Finished the panel Tested it yesterday with a nice sunny day. Without a fan just a duct goin into the house it syphonin inside from heat. It got up to 197 degrees. Thats hot . Got to seal it off good And put in a good fan . Anyone know a fan that puts out enough to keep th pannel cooler.
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Old 01-13-14, 04:02 PM   #3
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Quote:
Originally Posted by nokiasixteth View Post
Finished the panel Tested it yesterday with a nice sunny day. Without a fan just a duct goin into the house it syphonin inside from heat. It got up to 197 degrees. Thats hot . Got to seal it off good And put in a good fan . Anyone know a fan that puts out enough to keep th pannel cooler.
I think you will find that almost any fan (put it on the return to the panel) will drop the collector temp rather quickly. The cfm of the fan should be in ratio to the ft2 of the panel. I would start there.
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Old 01-13-14, 04:30 PM   #4
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Its 64 sq ft. From what i understand thats supposed to be able to heat 640 sq ft for a window . I have mine on a angle Usin this calculator
Solar Angle Calculator | Solar Panel Angle Calculator
43 degrees on january
And 51 degrees for Febuary
I put it at 48 degree slope Figured that sun moves 8 degrees a month.

So 124 cfm fan should be just fine Im guessin.
The hardest part was crawlin under the house and runnin a vent.
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Old 01-13-14, 04:35 PM   #5
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I would look at the arduino threads on this forum for a control that will vary the fan speed based on the panel temp. It would be a good control for your system.
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Old 01-13-14, 04:37 PM   #6
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Ive got a snap disk controller 90 off 110 on to controll the fan I just have to install it Ill see if i can find that thread though. Not real familur with the site yet.
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Old 01-13-14, 06:22 PM   #7
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Does any one know how much cfm that a 4 inch pvc pipe will handle and a 2 inch pipe will handle . Im going to do the rest of the house through the walls i ant gettin under that house again. And pipe is cheaper.
My panel is 64 sq ft Im runnin vents to 3 rooms Put a fan prob 125 or 150 cfm fan on the top outlet suckin air through th panel and blowin it through 2 or 4 inch pvc to th house
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Old 01-14-14, 10:08 AM   #8
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Hello nokiasixteth. I moved your posts off to their own thread since its kind of a different topic than the one you had posted in. It should get more attention here too.

Here is some info on CFM and duct sizing:
CFM's per duct size
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Old 01-14-14, 04:16 PM   #9
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Quote:
Originally Posted by Daox View Post
Hello nokiasixteth. I moved your posts off to their own thread since its kind of a different topic than the one you had posted in. It should get more attention here too.

Here is some info on CFM and duct sizing:
CFM's per duct size

Looked at them . Found out accordin to that 40 cfm is all a 4 inch duct can handle accordin to that place. My fan may be a bit to strong for the 4 inch. Found a 120cfm 12 v fan ill prob put inside the panel and suck the air through the panel and push it to the house that a way.
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Old 01-14-14, 04:28 PM   #10
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Quote:
Originally Posted by nokiasixteth View Post
Looked at them . Found out accordin to that 40 cfm is all a 4 inch duct can handle accordin to that place. My fan may be a bit to strong for the 4 inch. Found a 120cfm 12 v fan ill prob put inside the panel and suck the air through the panel and push it to the house that a way.
Have you taken any pics? We'd love to see.

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