Please help me to find this answer...I don't know how to choose appropriate impeller because this topic is new

Question

Selection of most energy efficient impeller for gas dispersion in two phase (liquid-gas) systems.

Answer 1

Are you trying to select a pump or a fan?

If a pump:

I assume you have the Pump Curve for the family of impellers you are considering.

1. Find the Design Discharge on the x-axis

2. Find the Design Pressure (Head?) on the y-axis

3. Draw a vertical line from the Discharge

4. Draw a horizontal line from the Pressure

5. Pick the next highest impeller curve over that crossing.  That is your impeller.

6. (Extra info) There is an Efficiency Curve for that impeller (There are several ways these are drawn, so your will need to figure out how to use yours.)  Read the efficiency for your impeller

Answer 2

Sounds like you need a course on applied "give more info."