solar panels producing hot air

Forum about Domotica, home automation and saving energy.
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

solar panels producing hot air

Post by drmacchi »

Who does have experiences with these products? They are cheap , but i want to be sure that can produce heat as they substain !

http://www.solarventishop.nl/
http://www.solarventi.com/generelt/SunM ... /index.htm
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

solar panels producing hot air

Post by drmacchi »

Today i finished my installation. (pictures will come in next days). I turned on the panel (is solar powered) in a shiny day. Ambient conditions were: at 11.00 AM , temp. = 14 C, humidity (H.R) = 43%. After 2 hours (13.30 PM) , air coming out from panel was temp = 33C , H.R =20% (ambient conditions were nearly the same of 11.00 AM). Tomorrow is going to rain , so i must wait for a complete shiny day to collect other data to test if temperature can even increase. H.R is really good (very dry). Take note that my will is to reduce HR in the basement. Cheers.
Verkenner
Member
Member
Posts: 338
Joined: Tue May 27, 2008 6:14 pm
Location: Netherlands

solar panels producing hot air

Post by Verkenner »

This is also interesting:

http://www.cansolair.com/

and the video: http://www.cansolair.com/videos.php?page=ntv


Regards, Verkenner
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

DIY solar panels producing hot air (2)

Post by drmacchi »

---------------------------------------
Last edited by drmacchi on Wed Oct 20, 2010 1:33 pm, edited 1 time in total.
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

DIY solar panels producing hot air (2)

Post by drmacchi »

Hi my friends, i did this topic here for a commercial panel.
Today after some DIY days i want to present you my own panel , made with alluminio , beer cans and polycarbonate .
Weight is <8 kgs !

My temp. measure of today : windy, full sunshine (PANEL IS NOT YET FINISHED , lack of lateral isolation and exit pipe is not isolated and connected with tape.... it's just to test :D )
outside air temp °C panel outflow air temp °C
17,6 72,9
18,8 75,4

see my video on youtube
http://www.youtube.com/watch?v=-OtDAkT_DU0

pictures

visione-pannello.jpg
visione-pannello.jpg (141.23 KiB) Viewed 19676 times
temp-ext.jpg
temp-ext.jpg (77.3 KiB) Viewed 19676 times
temp-panel.jpg
temp-panel.jpg (114.77 KiB) Viewed 19676 times
User avatar
Noel
Senior Member
Senior Member
Posts: 1887
Joined: Tue Feb 12, 2008 12:13 am
Location: Netherlands
Contact:

Re: solar panels producing hot air

Post by Noel »

Looks like a fun project!
What do you us to suck/blow the air, or does the temperature difference do this by itself?
--
Maak nu je eigen video bericht online.
Anyone interested in time travel meet me here last Thursday!!
ıɟ ʇ,uɐɔ noʎ buıɥʇʎuɐ ʇɹɐʇs ɹǝʌǝu
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

Re: solar panels producing hot air

Post by drmacchi »

12 cm pc fan , that "makes" 80 CFM = 135,93 m3/h

fan is , for today powered by a 12v psu, but i have a ready to use photovoltaic panel (10watt) to mount aside the air-panel
User avatar
Noel
Senior Member
Senior Member
Posts: 1887
Joined: Tue Feb 12, 2008 12:13 am
Location: Netherlands
Contact:

Re: solar panels producing hot air

Post by Noel »

I'm definitely going to have a go at this project (small version 1st)

What are you using as a 'lens' ?
--
Maak nu je eigen video bericht online.
Anyone interested in time travel meet me here last Thursday!!
ıɟ ʇ,uɐɔ noʎ buıɥʇʎuɐ ʇɹɐʇs ɹǝʌǝu
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

Re: solar panels producing hot air

Post by drmacchi »

i spent a week on deciding which panel (front vs. sun i mean) , you know i'm a chemist , so i gave a look at many different panel and studied their most important features like light transmission, heat block (once inside the structure), uv-resistant , moisture absence , cells size and numbers (every pannel has many small internal cells), weather resistance ect etc. and PRICE !
the best, is (at the moment):

LEXAN THERMOCLEAR UV RESISTANT .

Please note thermoclear , because there are many many different types , thermoclear is the good one for solar panels

The problem of this first DIY is the chassis : here the panel are glued and then blocked using alluminium angle-profilates , the best would be to find a modular system (alluminium) where you simply insert the panel in the groove. something like this

http://www.algoalluminio.it/products.php?prodid=0260

Do you have any ideas (web sites) for this?
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

Re: solar panels producing hot air

Post by drmacchi »

The sun is going down , the top result has been

ambient : 22 C (wow like end of summer :D )

panel outflow : 90 C !!!
User avatar
Noel
Senior Member
Senior Member
Posts: 1887
Joined: Tue Feb 12, 2008 12:13 am
Location: Netherlands
Contact:

Re: solar panels producing hot air

Post by Noel »

drmacchi wrote:The problem of this first DIY is the chassis : here the panel are glued and then blocked using alluminium angle-profilates , the best would be to find a modular system (alluminium) where you simply insert the panel in the groove. something like this

http://www.algoalluminio.it/products.php?prodid=0260

Do you have any ideas (web sites) for this?
I have some friends who work in the alluminium industry. I'm going to ask theme if they know something like this.
How deep does it need to be?
--
Maak nu je eigen video bericht online.
Anyone interested in time travel meet me here last Thursday!!
ıɟ ʇ,uɐɔ noʎ buıɥʇʎuɐ ʇɹɐʇs ɹǝʌǝu
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

Re: solar panels producing hot air

Post by drmacchi »

dimension is relative : i mean as bigger is, as more heat could generate. then we must consider the can dimensions : mine are 0.50 lt of beer (oh oh this summer i drunk 224 cans = 112 lts :D :D ) and are 17 cms tall.
you must think what dimension you need and then calculate how many can-columns and how tall.
mine are 16 columns with 14 cans each
User avatar
Noel
Senior Member
Senior Member
Posts: 1887
Joined: Tue Feb 12, 2008 12:13 am
Location: Netherlands
Contact:

Re: solar panels producing hot air

Post by Noel »

Just thinking about the outer case/shell.
Is it not better if this was made from wood to keep all the heat inside?
--
Maak nu je eigen video bericht online.
Anyone interested in time travel meet me here last Thursday!!
ıɟ ʇ,uɐɔ noʎ buıɥʇʎuɐ ʇɹɐʇs ɹǝʌǝu
drmacchi
Advanced Member
Advanced Member
Posts: 827
Joined: Wed Aug 08, 2007 5:48 pm
Location: Italy

Re: solar panels producing hot air

Post by drmacchi »

wood was first idea , simple to buy and to construct.
but it's heavier , you must carry it on your roof...
years of water , snow , wind, sun outside : you must repaint it every "x" years and be careful to not paint the front face.
Alluminium is better, just my 2 cts.
Digit
Global Moderator
Global Moderator
Posts: 3388
Joined: Sat Mar 25, 2006 10:23 am
Location: Netherlands
Contact:

Re: solar panels producing hot air

Post by Digit »

This is great! How much were the costs of all the materials?
(don't count the beer cans of course, cause I guess you had a lot of fun emptying those :lol: )
Post Reply

Return to “Energycontrol & Home Automation Forum”