Pumping Station Optimization

When two or more pumps operate in series, the total head-capacity curve is obtained by summing up the pump heads at each capacity. Series pumping is most effective when the system head curve is steep. Multiple pumps in 

Combined Head-capacity Curve for Pumps A and B Operating in Parallel 

Two pumps, each with a capacity of 50% design flow at 100% design head 

Pump turndown and rangeability can be increased by operating two or more pumps in parallel. 

When constant-speed pumps are used, the booster pump can be started and stopped automatically on the basis of pressure. In this case, an adjustable dead band is provided in the low pressure switch (PSL), which prevents the on-off cycling of the booster pump. The width of the dead band is a compromise as the band is narrowed, the probability of cycling increases, whereas the widening of the band results in extending the periods during which the booster is operated unnecessarily. 

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In order to optimize a cooling system, the cooling towers, pumping stations, chillers, and process equipment should be treated as an integrated single system. 

Optimization controls of a pump station consisting of a constant- and variable-speed pump. 

Illustration of a control system that optimizes the energy consumption of a pumping station, consisting of two variable-speed pumps, by keeping the most-open user valve at near 90% opening. 

The adjustable-speed centrifugal pump optimization techniques will reduce the energy consumption of pumping stations by 12% or more, depending on the nature of the load served. They will also reduce pump wear commensurately. Combined with surge-free pump starts and stops, and with their inherent predictive maintenance capability, these strategies can also improve the overall plant operation. 

If the liquid electrolyte design is selected for the electrolyzer, the optimization controls in Figure 4.1 (gatefold) include the electrolyte balancing controls based on the valve position control (VPC-32) of the variable-speed pumping station (VP-6). These controls are the same as those described for VP-1 and elaborated on in Chapter 2, Section 2.17.2. The power distribution controller (PoC-15) serves to control the electric power sent to the electrodes of the electrolyzer, and the pressure controller PC-14 serves to maintain the H2 pressure in the distribution header at around 3 bar (45 psig). 

One significant advance in this area is the application of more and better electronic devices in the pump stations, such as improved frequency converters and computer programs which optimize the running costs of the pumps. Sensors can also be added to monitor the conditions inside the... 

PULIDO-CALVO I, GUTifiRREZ-ESTRADA t c et al. (2006) Optimal design of pumping stations of inland intensive fishfarms. Aquacultural Engineering 35(3) 283-291. 

Suppose it is necessary to determine the most economical variant of fluid transportation from the pumping station on branch 1-2 to consumption nodes 3, 4 and 5, i.e. find the minimum of function F(x,d), where x = (xi,...,x ) and d = d, ...,d ) are vectors of volumetric flow and parameters (e.g. pipe diameters on network branches) X and rf -their components. MEIS of optimal flow distribution and the method of multiloop... 

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