Tuesday, April 2, 2019

Cooling Tower Pumping and Piping

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1. Tower Pumping
1. Downcomer Siphon Draw
2. Pump Curve Maintenance
1. Tower Bypass Into Suction Line
2. Pan Drain-Down On Start-Up
3. Tower Vortexing; Excessive Exit Velocities
3. NPSH; Cavitation
4. The Tower Pump and Its Suction Line
1. Leave the Suction Line Alone!
2. Place the Pump Below Tower Pan Water Level!
3. Avoid “Above the Pump” Air Traps in the Suction Line!
4. Avoid Fine Mesh High Pressure Drop Strainers in the Suction Line!
5. Predicting Pump Operating Points
1. The System Curve
2. Non Bypassed Tower Pump Operating Shift
6. Tower Bypass
1. Tower Bypass - General Methods
2. Bypass Valve Operational Characteristics; Valve Coefficient (Cv)
3. Tower Bypass; Design for Flow Stability

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