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2019-07-16View Original

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RT,饱和蒸汽在通过减压阀之后的状态是过热蒸汽呢?还是饱和蒸汽?如果是饱和蒸汽,温度能量转换到哪里去了?
Reply #22019-07-16
过热蒸汽,压力骤降,温度下降的幅度跟不上压力下降的幅度
Reply #32019-07-16
你的意思是还是饱和蒸汽?那减压之后的蒸汽流量可以按照理想气体方程公式计算体积流量吗?还是说减压之后,体积流量不变?
Reply #42019-07-16
http://blog.sina.com.cn/s/blog_611969ad0101evkt.html
Reply #52019-07-16
阀前后按等焓值考虑,出口是过热。节流损失没那么大
Reply #62019-07-16
减压之后的蒸汽可以利用理想气体公式计算体积吗?按照你的意思,温度没变,P1V1=P2V2?
Reply #72019-07-16
减压之后的蒸汽可以利用理想气体公式计算体积吗?按照你的意思,温度没变,P1V1=P2V2?
Reply #82019-07-16
我这哪有意思说温度不变:L,温度有降低,不能按理想气体
Reply #92019-07-16
用这个公式计算误差不大。 蒸汽很少研究真实体积的,根据物质守恒在不存在液化的情况下标准体积不变,一般都是用标方计量
Reply #102019-07-16
那还是没有达到饱和蒸汽的温度撒,是会有点节流损失
Reply #112019-07-17
建议楼上的专家们看下这个帖子,这个问题很早以前就有人讨论过了https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1009702
Reply #122019-07-21
可以用ASPEN软件模拟下,压力降低,温度稍微降低,但相对减压后的压力,是过热蒸汽。
Reply #132019-07-22
通过实践10bara饱和蒸汽经过减压节流阀后,得到的5bara蒸汽温度是下降的,但可能比5bara蒸汽温度稍高点,影响不大。

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