我在voa看到的描述 http://www.voanews.com/english/2007-08-09-voa60.cfm The pot-in-pot cooler keeps vegetables fresh for days -- making it possible to earn money from produce that would otherwise spoil before it could be brought to market. "It's designed by Mohammed Bah Abba, an engineer out of Nigeria,” Smith says. “It's one ceramic pot inside another ceramic pot. Between the two pots, there's sand. You pour water into the sand, and as the air evaporates, the hot air escapes from the center of the pot, and leaves cool air." 基本上這是設計給窮人的冰箱。 文章是說，把一個陶罐放在另一個陶罐裡，兩者的縫隙放進沙子，然後把水灌進沙子。 這樣的話熱空氣會蒸發留下冷空氣在裡面，就達成保冷的效果。 看起來很有趣，不過我很難想像這是怎麼運作的，有人想要試著實作看看嗎? --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 59.116.40.238 ※ 編輯: wwwptt 來自: 59.116.40.238 (08/16 21:29)