ASPEN Heat Exchanger Design
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For the state definition of heat exchanger fluids, there are three parameters: temperature, pressure, and molar fraction; only two of them need to be entered. Question: Can two parameters fully define the status of logistics? ?
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Thank you, but my specific question wasn’t answered. I think two parameters aren’t sufficient to fully determine the logistics status, yet ASPEN only requires two inputs, which is why I have this doubt
To determine how much gas is present in a fluid, one essentially carries out isothermal flashing. During isothermal flashing, there are C+2 degrees of freedom; the flow rate accounts for one degree of freedom, and the composition accounts for C-1 degrees of freedom. Two degrees of freedom remain, which can be temperature, pressure, the gas phase fraction, or enthalpy – any two of these can be specified.
For example, at 100 degrees Celsius, the vapor fraction is zero; there are many possible pressures for 100 kg/h of water. Was a pressure greater than 1 atmosphere tried? ? ? ? 4# lsrwan