Hydraulic Design Notes

Hydraulic Design Notes - CHE 3013 Rate Operations I Design...

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09/14/10 1 of 2 CHE 3013 Rate Operations I Design of Hydraulic Systems (General guidelines, there are exceptions!) Guiding Principles 1. Steady-state flow achieved when: (Driving Force) available = (Driving Force) required 2. Single-phase flow is preferred. 3. There is a power cost associated with pressure drop (regardless of Δ P source). 4. Increasing liquid pressure is relative easy and inexpensive (pumps), increasing pressure of a gas or vapor is more difficult and expensive (compressors). 5. Adequate hydraulic capacity must be provided for upsets and startup/shutdown. 6. The pipe size (diameter) must be large enough to satisfy Δ P or fluid velocity constraints. 7. The best design provides the required service at the lowest cost. Typical Line Velocities (from Table 8.1, Unit Operations of Chemical Engineering, 5 th ed., McCabe, Smith, and Harriott, McGraw-Hill, NY, 1993) Fluid Type of Flow ft/s Thin liquid (most liquids) Gravity flow 0.5-1 Pump inlet 1-3 Pump discharge 4-10 Process line 4-8 Viscous liquid Pump inlet
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This note was uploaded on 10/11/2011 for the course CHE 3013 taught by Professor Staff during the Fall '11 term at Oklahoma State.

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Hydraulic Design Notes - CHE 3013 Rate Operations I Design...

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