Speaker: Adam Grossert
Key words:冰箱
Abstract:TED演讲者Adam Grosser的项目是关于建造一种不需使用电的冰箱,并利用它把重要的需要冷藏的医疗物品运往世界各地的村庄和诊所。
Content:
Prototype:IcyBall
IcyBall was a name given to two early refrigerators, one made by Australian Sir Edward Hallstrom in 1923, and the other design patented by David Forbes Keith of Toronto, Ontario, Canada (filed 1927, granted 1929), and manufactured by American Powel Crosley Jr., who bought the rights to the device. Both devices were unusual in design in that they did not require the use of electricity for cooling. They ran for a day on 2 hours of sunlight, allowing rural users lacking electricity to utilise the benefits of refrigeration. @wiki
Icyball 这是个绝妙的想法 但我会告诉大家为什么没有成功 先解析一下运作原理 这里有两个半球体,中间有一定的距离。一个装有工作介质,含水和氨。 另一个是冷凝器 当你將一侧加热时,热的这一侧 氨开始蒸发 然后它会在另一侧重新凝固 之后让它降到室温 当氨重新蒸发时会与水结合 回到先前的热的一侧,它会产生很强大的制冷效果。
演讲者的突破:低压力下运行,无毒的制冷剂
Comment:
主要原理是利用制冷剂的两个特性:1、制冷剂蒸发时带走大量热量 2、制冷剂蒸发的动力来源于气态的制冷剂被另外的液体吸收溶解,所以称这种制冷剂为gas-absorption refrigerator。
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