Multi-flow

[mizzoueng]

I have multiple flows going into a deaerator. I need to determine the output temperature, but I only have the input mass flow rates and enthalpys.

Does anyone know a way to figure temperature based on mass flow and enthalpy alone?

 

[insult2injury]

You need two independent intensive properties to determine all other properties.

I2I

 

[rmw]

Assuming that the deaerator is single pressure, all your flows flash down to the operating pressure of the deaerator. The operating pressure determines the temperature. Look it up in the steam tables.

rmw

 

[imok2]

The same principle as in a refrigeration system