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    用液氮开动的汽车

    作者：czhxzx  人气： 561 次  时间：2011年12月19日  星级：

    氮气不是燃料，能开动汽车吗？回答是肯定的，这似乎有些奇怪。但位于美国西雅图的华盛顿大学的荣誉教授阿贝·赫茨伯格说，他领导的一个科研小组改装了一辆老式的邮政车，它的发动机像老式蒸汽机一样工作，但其中的蒸气不是用水，而是用液氮。

     

    传统的燃煤蒸汽机是用锅炉将水烧成高压蒸汽，用来推动活塞式发动机发电。而赫茨伯格的发动机用的是液氮，液氮在-196 ℃就会沸腾，因此不需要外部燃料源，液氮只要经过一个空气热交换器就能汽化，汽化的液氮可产生足够的压力开动活塞式发动机。

     

    这种汽车排气管排出的是纯净的低温氮气，不会对环境产生任何污染，而且能帮助消除温室效应，阻止全球变暖。

     

    液氮也可以用于医疗方面，液氮冷冻治疗是近代治疗学领域中的一门新技术。正常细胞在极度冷冻的状态下，会发生不可逆转的损害。液氮冷冻治疗就是提供极度冷冻的环境，将病区细胞迅速杀死，使得病区得到正常的恢复。一般用来治疗瘊子、鸡眼以及皮肤病等。

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