Is it necessary to increase the inlet pressure under this working condition?
Thread Content
At present, we need to make changes to the original working conditions in our design.: The inlet pressure of the heat exchanger (height 4m) is 0.4MPa, and the outlet pressure is 0.15Mpa. Current working conditions: The height of the heat exchanger is increased by 20m, that is, 24m. If we want to allow the material liquid to flow out, is the inlet pressure still 0.4MPa? If not, how much should it be increased to? Thank you all!
The inlet pressure will be less than 0.4MPaG, but there is no need to increase the inlet pressure
You want to ask whether to maintain 0.4MPa? You need to increase the static pressure energy to offset the potential energy. . If there is no phase change heat in the gas, you only need to check whether the physical properties under the inlet and outlet pressures meet the requirements for heat transfer. Just make sure you can put the liquid in. The situation with phase changes is much more complicated. It may be beneficial or harmful.
This is a problem of matching the resistance of the entire system process. As long as you can ensure that the inlet and outlet pressure difference is greater than 0.4MPa-0.15Mpa=0.25MPa, it will not affect normal use. But be careful, whether the absolute pressure at the outlet will become too small, affecting the changes in physical properties!
That depends on your outlet pressure requirements. Wouldn't it be enough to consider the static pressure difference of the liquid column?
It should be that the pressure difference within the heat exchanger remains unchanged at 0.25MPa. I need the outlet pressure to be still 0.15MPa. What is the inlet pressure? Thank you all!
There shouldn't be any need to improve, I also need to know the final correct answer.