Cooling Tower Pump Head Calculation Pdf

Deppmann we receive a continuous barrage of questions regarding concern over npsh net positive suction head and tower pump selections.

Cooling tower pump head calculation pdf.

The most common open system is the cooling tower portion of a chilled water system as depicted below. The cooling tower fans modulate in order to maintain the necessary condenser water supply temperature. For the tower piping circuit the pump must overcome the piping flow friction loss. The condenser wate r pumps run at a constant speed flow.

Piping condenser cooling tower losses and valves. Ntu or kav l calculation 9. A improper application of tower bypass controls. The difference between the cooling tower outlet water.

Unstable pump operational points as caused by. Cooling towers performances 5. 2 ump cavitation and loss of pumping ability as p hcaused by inadequate pump suction pressure. Components of cooling towers 4.

Choosing a cooling tower type 7. In this calculation cooling tower approach cooling tower range are important factors. As caused by tower pan vortex pan drain down or faulty bypass. The recirculation rate and the temperature drop across the cooling tower are the two pieces of data needed to calculate the amount of water lost from the open recirculating cooling system due to evaporation.

Starting with the suction piping it is important to take precaution to avoid air pockets which can destroy a pump in pretty short order. Evaporation temperature drop. Cooling tower basic calculations. Water flow and heat transfer 8.

This week let s look at npsh r or net positive suction pressure required by the pump. Air in pump suction. It is the most confusing set of values shown on a pump curve. An equalizer is provided between multiple cooling towers to stop different water levels from occurring between cooling towers.

Consideration of by pass wall water 10. 4 0 condenser water pump calculator inputs. Some fairly catastrophic events can occur if either is improperly installed. Following items will be discussed and calculated in this article.

Pressure drops in cooling towers 11. Condenser system for vacuum creations and its types with design criteria. Velocity head and suction for pumps. 526 charlotte avenue burkburnett tx 76354.

The pump head calculation depends on the type of system that the pump serves. It must also provide the energy head necessary to raise water from a low to a higher static head level. Correctly piping the suction and discharge of your cooling tower condenser water pump is critical. Air flow arrangements 12.

Cooling tower types 3. A break in the piping system occurs where the water exits the spray nozzles and is exposed to.