Welcome to the Solar Collector
Brainstorming and Development Page!


 

Home

Hot Air Collector

Hot Water Project 1

Hot Water & Space Heating

Solar Electric

Solar Construction 101

FAQs

Best Collectors

Simply Solar
Sign up Calendar Latest Topics
 
 
 


Reply
  Author   Comment  
paulstef

Avatar / Picture

Registered:
Posts: 98
Reply with quote  #1 
Did anyone research on hybrid hot water/PV panels?

I wonder how good of an absorber a PV panel is? Better /worse than black paint on metal surface?

Something like this http://www.instructables.com/id/Hybrid-solar-panel-photovoltaic-and-thermal/

paulstef

Avatar / Picture

Registered:
Posts: 98
Reply with quote  #2 
Well, reading further it seems that a lasting system cannot be built for cheap. Solar cells break easily.
Maybe an off-the shelf solar panel could be used ?
solardan1959

Avatar / Picture

Registered:
Posts: 1,845
Reply with quote  #3 
I would think that if it came to building your own like this guy did,  thin film PV stuck to a tin roof style panel and suck the air from behind the tin panel would work very well.  A twin wall covering and you basically have an air heater anyway though if covered it may get fairly warm for the thin film PV but would allow it to produce good heat all year around.  A link at the end show this a already being produced by a major manufacturer:
http://solarwall.com/en/products/pvthermal.php  and we have recently discussed several dual purpose PV and air systems.

The home built one I reference above would cover the whole south side of you roof as thin film PV produces less electricity but a large collector like this could go a long way to providing most of the the heat and electricity a normal house would use. 

Dan
stmbtwle

Avatar / Picture

Registered:
Posts: 2,858
Reply with quote  #4 
A few years ago someone came up with a water-heater module that fit UNDER the PV panel and absorbed the heat from the panel.  It probably worked (after a fashion) but I don't know what became of it. 

PV panels DO get hot, and yes they're more efficient if they are at a lower temperature.  However I'm not sure they get hot enough to heat water to a usable temperature.  Air-cooling seems to work, and water-cooling is probably not (currently) cost-effective. 

When push comes to shove, it's all about the money.

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
netttech

Registered:
Posts: 720
Reply with quote  #5 
I agree Solar PV panels get hot, but not sure it would be worth while to try collecting the heat from it. I would bet it wouldn't collect as much heat as a standard hot air panel & even less for water. I wonder if contact with water would eventually cause issues with the solar pv side.

I bought cells, did the soldering, etc, as described in the link (still have it). Stmbl is right, the panel gets hot...but as hot as aluminum painted black in a panel...don't think so.

If you want solar hot air or water....just build it separately.

Jeff
Central IL
Solar Air & Water
longoria6111@gmail.com

Registered:
Posts: 12
Reply with quote  #6 
Hello and thanks wouldn't it depend on where you lived? Example Cal or Arizona? Rotating hot air and hot water.?Its an idea I've been working.g on. Hopefully it will become reality in a few weeks
I'm in the process of the fans and had another idea of using thin film to cover the copper pipes. The kind of film to they use on window tinting ? Its just an idea? Any thoughts?
netttech

Registered:
Posts: 720
Reply with quote  #7 
Thin film on copper pipes?? I'm not sure what you're trying to do with the thin film (window tint).

If you are trying to wrap it on the copper to make it hotter....I betting it will melt. You don't want to reflect sun from copper pipes. If you're wanting to reflect the sun onto the pipe, yea it may work ok.

However, there are better reflective mylar than the window tint stuff.

I don't have the website on this computer, but you can buy a 5' x 25' roll around $30, which has a higher reflective quality. I use it for my parabolic trough panel.

Jeff
Central IL
Solar air & water
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.

 

web statistics