DIY Aircon with Plastic Bottles

[Sunny]

Taipei Eco ark also made of plastic bottles

 

http://inhabitat.com/ecoark-pavilion-made-from-1-5-million-plastic-bottles/

[Showster]

I tried to understand the Physics behind it to see if it were really true...

 

Based on the explanations, it seems that it is due to either or both, mixing of cool (surrounding) air or evaporation.

 

In those cases, it still does not constitute aircon effect, more like a wind or fan effect...

 

"When you blow harder, more surrounding air gets mixed in with the stream of air from your mouth.

 

The faster air moves, the lower pressure it has (Bernoulli's principle). So when you blow faster, your stream of air is lower pressure than the surrounding air. Thus the surrounding air fills in the stream. The surrounding air is obviously cooler than the air in your lungs. To test this - blow fast, but put your finger right on your lip - notice it's still quite warm because other air hasn't had a chance to mix in yet.

 

To visual why this happens, imagine the stream of air coming from your mouth as a freeway with all red cars on it. Every on ramp to this freeway has a long line of blue cars eager to get on. If traffic is moving slow, and the red cars (air from lungs) are very close together, not a lot of blue cars (surrounding air) can get on. But if the traffic is sparse and the flow quick, you'd see more of a mix of red and blue cars."

 

Edited June 7, 2016 by Showster

[Albeniz]

I like this thread.  A lot of innovative ideas.

[Albeniz]

In Philipines, they have plastic-bottle lights !!! 

 

liter_light_01_wide-c5c0293d0e20ec7d93045dfbb188629d2f3d5be0.jpg

 

http://www.npr.org/2011/12/28/144385288/in-philippine-slums-capturing-light-in-a-bottle

 

This method reminds me of 凿壁借光.

 

Chisel a hole in the wall, to borrow the light.

Edited June 19, 2016 by Albeniz

[Tigershark1976]

then that time put on the cap lor

 

 

 

 

 

 

 

 

 

this bottle pot looks interesting. Will try "vertical gardening" method in my balcony since the space for plant in my balcony its full...