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." 基本上这是设计给穷人的冰箱。 文章是说，把一个陶罐放在另一个陶罐里，两者的缝隙放进沙子，然後把水灌进沙子。 这样的话热空气会蒸发留下冷空气在里面，就达成保冷的效果。 看起来很有趣，不过我很难想像这是怎麽运作的，有人想要试着实作看看吗? --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 59.116.40.238 ※ 编辑: wwwptt 来自: 59.116.40.238 (08/16 21:29)