Solar Bottle Lights - Philippines

Solar Water Heater - Brazil

feather wrote:
This is cool. I have one similiar in my youtube favourites.

Good links feather, cheers

feather wrote:
Brilliant vid. I like the simplicity of it, food for thought on this one.

Thanks for posting.
gris

Detailed drawing here

www.connect-green.com/wp-content/uploads/2010/09/131218.jpg

The Apprentice wrote:
Gravity fed hot water system. Simple. Simple is good, I like simple

gris

That's a really good improvement on an established idea. Me like.

Full article here > https://www.connect-green.com/a-diy-solar-water-heater-from-plastic-bottles/

A few mods I would add for the system are.

Wher the hot water returns along the top rail I would use heavy duty pipe lagging cut carefully to encompass the T joints to the heat cannot escape to the atmosphere through convexion.

Use an insulated standard cistern.
Paint the cold water pipe black or use black plastic pipe.

Use silver foil backing inside the bottles to focus the light energy on the underside of the central riser pipes, use blacknplastic for these also.

Use a seperate cold water header tank so there is just hot water in the reciever tank only.

Use a smaller bore pipe for the inward cold supply so the hot waterwants to take the easiest route upwards through the larger thermo direction.

Keep the twopipes apart from each other so no cross convexion is evident.

I'm going to have a go next week.

Did you notice right at the end of the film, the guys on the roof, their faces were fully covered fitting the lights, even here fears not to be seen saving money for yourselves.


feather wrote:

The Apprentice wrote:
Good suggestions. You could end up with super heated water with those amendments!