This is Mohammed Bah Abba's Pot-in-pot invention. In northern Nigeria, where Mohammed is from, over 90% of the villages have no electricity. His invention, which he won a Rolex Award for (and $100,000), is a refrigerator than runs without electricity.
(https://forum.dhammacitta.org/proxy.php?request=http%3A%2F%2Fwww.newmediaexplorer.org%2Fchris%2Fpot-in-pot1.jpg&hash=e9e374c261c0b6a3b5827b3fd381d897c7e03b0c)
Here's how it works. You take a smaller pot and put it inside a larger pot. Fill the space in between them with wet sand, and cover the top with a wet cloth. When the water evaporates, it pulls the heat out with it, making the inside cold. It's a natural, cheap, easy-to-make refrigerator.
(https://forum.dhammacitta.org/proxy.php?request=http%3A%2F%2Fwww.newmediaexplorer.org%2Fchris%2Fpot-in-pot3.jpg&hash=d43cc9e32660c814fcd17b1033ba4308eb6e3764) (https://forum.dhammacitta.org/proxy.php?request=http%3A%2F%2Fwww.newmediaexplorer.org%2Fchris%2Fpot-in-pot4.jpg&hash=efa1e3c2d9add3ffbd556e1677f561065e14f81d)
So, instead of perishable foods rotting after only three days, they can last up to three weeks. Obviously, this has the potential to change their lives. And it already has -- there are more girls attending school, for example, as their families no longer need them to sell food in the market.
Arnold Williams from hathaby.net commented on this in his weblog. He said:
QUOTE
Brilliant ideas don't need to be difficult to execute: here's a case in point. The technology has been known for centuries, but WASN'T APPLIED TO THE PROBLEM. Notice that applying technology also has the effect of educating young people.
http://www.newmediaexplorer.org/chris/2004/04/14/cool_fridge_without_using_electricity.htm
keren...
kulkas tanpa listrik?
klu kulkas gw dirumah, dicabut listriknya jd lemari makanan dech :P
tapi hebat juga tuh orang, bisa menyimpan makanan tapi ga rusak...
penemuan hebat ;D
cool..
jangan lupa kasih tau cara kerjanya...
biar kita semua produksi kulkas tsb juga....
nice post.... (kayaknya udah lama tuh...... org cina uda tau buat kulkas
ribuan thn yg lalu.... dgn kain dan air...)
^
^
tapi lupa dipublikasi, kecolongan dech, ama tuh india...
sayang gak diuraikan range suhu yang diciptakan oleh kulkas tanpa listrik ini..
tertarik seh.. ^^
koq bisa ya?
terakhir gw naruh sawo...
tiga hari kemudian mateng :-[
^
^
maka nya om forte test aja..
Nanti ukur deh brp derajat suhunya..
trus kasih tau kita2 disini ;D
asalkan jangan jadi suhu medho aja ya.. hehehe
Quote from: Elin on 10 June 2009, 03:58:47 PM
^
^
maka nya om forte test aja..
Nanti ukur deh brp derajat suhunya..
trus kasih tau kita2 disini ;D
asalkan jangan jadi suhu medho aja ya.. hehehe
keburu dipatenkan lagi.
dengan nama coldfortezer ** keren kan \;D/
(https://forum.dhammacitta.org/proxy.php?request=http%3A%2F%2Fi116.photobucket.com%2Falbums%2Fo11%2Fyhjow%2Ftongbingjian.gif&hash=6b32700a078dd3e289879f08bf141062b665da5b)
"Tong Bing Jian 铜冰鉴 " (literally "Bronze Ice box"), which dated from around 300 BC, in the warring states period (see picture below). I believe it's the world's earliest excavated refrigerator.
This ancient chinese refrigerator was excavated in 1978 from Zenghouyi Tomb in Sui county in Hubei province (湖北省随县曾侯乙楚墓). It was made of bronze. Basically, it can contain a lot of ice and one can put the food inside the box to preserve its freshness and prevent it from rotting.
Chinese refrigerator could have been invented as early as Zhou period. The Book of odes "Shijing" 《诗经》 mentioned that slaves stored up ice to allow the aristrocrats to drink water. The Book of rites also mentioned "祭祀共冰鉴" (Jisi gong bin jian - Worship with ice box).
Quote from: Kemenyan on 10 June 2009, 03:57:32 PM
koq bisa ya?
terakhir gw naruh sawo...
tiga hari kemudian mateng :-[
Aku taruh alpukat di tong beras...juga cepat matang tuch.... :))
_/\_ :lotus: