Aspen Plus低压蒸汽LP Steam
小白请问一下,Aspen Plus中的公用工程用到低压蒸汽LP Steam,系统设置温度是125℃-124℃。为什么低压蒸汽使用之后的温度只下降了1度?是设备设置的不对还是什么原因?
应该是设置问题 只是使用潜热,所以温度变化不大 汽变液,饱和, 蒸汽通过换热器后有压降啊 The outlet is defined to have a slightly lower temperature than the inlet so that the outlet will have a slightly lower pressure than the inlet. In the event that you wanted superheated steam or subcooled liquid, you would enter
the temperature and pressure combination instead of a temperature and vapor pressure
combination. Usually, real systems superheat and subcool by a few degrees as a safety
margin. 同意三楼,能量来自于蒸汽的潜热。 注意看下蒸汽进入换热器前后其中气相分率的变化,温度变化不大不代表换热不大 蒸汽液化过程释放出来的热能是潜能,温度不变。例如在1个大气压下水蒸汽冷凝,温度恒定为100(摄氏)度,如果冷凝水变成99(摄氏)度的话,说明液态水过冷了1(摄氏)度。
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