Tom gayle
Where are you at with this project at the moment? Did you find a suitable solar panel?

 

Actually, it's 50cm?

1m x 500mm is the approximate size of a 12V 6A PV panel. It can be a bit off from that in either dimension. The differences seem to be concerning the mounting frame.

500mm x 500mm would the expected size of a 6V 6A panel, based on the idea that you need a certain area of PV cell tp produce a certain amount of power and you can, basically, trade off current vs. voltage.

 

Tom gayle
Where are you at with this project at the moment? Did you find a suitable solar panel?

It's basically more cm than I expected.so I can't able to buy it.i thought the cm will be small

 

There’s a lot of solar panels on eBay making ridiculous claims about the power output, and when challenged reply that it is the “peak” output (as if there are bursts of sunlight which shine briefly at 5 times the average)

maximum power output = 0.2 x width In metres x length in metres.

 

There’s a lot of solar panels on eBay making ridiculous claims about the power output, and when challenged reply that it is the “peak” output (as if there are bursts of sunlight which shine briefly at 5 times the average)

maximum power output = 0.2 x width In metres x length in metres.

Hmmm..but it doesn't suitable for my project.i only need 15cm approximately.so,I think powering the device through generator mechanism, may be good...

 

Are you trying to cool something to below ambient temperature?
If not, bearing in mind the relative efficiencies of photovoltaic and Peltier devices, just get a sheet of aluminium the size of the panel you were hoping to use, and use it as a heatsink.

 

Are you trying to cool something to below ambient temperature?
If not, bearing in mind the relative efficiencies of photovoltaic and Peltier devices, just get a sheet of aluminium the size of the panel you were hoping to use, and use it as a heatsink.

U say,I can use aluminium sheet instead of solar panel?

 

U say,I can use aluminium sheet instead of solar panel?

He was suggesting that an aluminum panel would radiate away as much heat per square volume as a peltier device and solar cell combination of the same area.

In other words. passive cooling by radiation, if there is somewhere to radiate it to.

 

He was suggesting that an aluminum panel would radiate away as much heat per square volume as a peltier device and solar cell combination of the same area.

In other words. passive cooling by radiation, if there is somewhere to radiate it to.

Got it

 

It makes no sense to use a Peltier cooler on a solar panel. They're so outrageously inefficient that you'd need several more solar panels just to run the cooler and the fan(s). I'd look at ways to improve passive cooling, like exploiting the fact that heat rises, or a small fan, or water cooling if you happened to have an unlimited supply of free gravity-fed water (not unreasonable in an off-grid situation).