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2020-06-19View Original

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Reply #22020-06-19
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Reply #32020-06-21
继续翻译剩余的文本。
Reply #42020-06-22
学生吧,基础没学好还喜欢钻牛角尖,思想转变很困难。W=FS,力*距离,对于气体可以压缩产生距离,做功多。液体压缩距离极小可以忽略,S极小,乘不出多大数值
Reply #52020-06-24
一般来说,液力透平是把压力能转变为机械能,如果降压后还是还是液体,那么温度变化不会不太明显。但是对于在临界条件下的液体,如氨、氟利昂、液化气等,降压后变成气体,温度会大幅下降,这是制冷原理。液体经过节流阀降压,能量消耗在摩擦阻力和温度变化上,所有高压差的节流阀噪音都很大。个人见解。

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