Page 279 - Centrifugal Pumps Design and Application

248 Centrifugal Pumps: Design and Application

ure 14-2), In general, many users find that HPRT's repay their capital
cost within one to two years. However, before hydraulic power recovery
can be feasible and economical, there must be sufficient flowing liquid
capacity available at the necessary differential pressure as well as accept-
able conditions of corrosion and erosion.

Selection Process

Before selecting HPRT's the following information is needed:
1. Available head range
2. Available capacity range
3. Back pressure at turbine outlet
4. Desired RPM
5. Chemical composition of the fluid
6. Temperature and specific gravity of the fluid at turbine inlet
7. Compressibility of the fluid
8. Gas entrapment
9. Preferable materials
10. Installation configuration
11. Vibration and noise level
12. Control equipment

Figure 14*2. HPRT application range chart (from McCIaskey and Lundquist).