Using circulating pumps in parallel or series configurations can attain many economic and operational gains as opposed to using one large pump to supply a system’s pumping requirements. Very much welcome if some good material or pdf is attached to understand it. Dependable partnership. They are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. Pumps Application In Series Or Parallel - posted in Industrial Professionals: Hello all, I am very much interested to know when should we go for pumps in series and parallel? Thank you.
If it becomes necessary to shut one of the operating pumps down, the remaining operating pump will still provide a high percentage of the system flow until the standby pump can be started. In simple words, it is a pump that uses a rotating impeller to move water or other fluids by using centrifugal force. Parallel Pumping in a Typical Cooling Tower System. Pumps are combined in series /parallel to obtain an increase in head or flow rate.The series and parallel offer following advantages: • Possibility of improving Life Cycle Cost (LCC). Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. Parallel operation, or parallel pumping, of two centrifugal pumps is a mode which allows pump operation to be controlled by starting or stopping one of the two pumps.
Next, we will take a look at two pumps in parallel as shown in Figure 4.
This resistance might be caused by the system or by the stationary Pump-B. Two Pumps in Parallel. CENTRIFUGAL PUMPS IN SERIES - HIGH HEAD / LOW FLOW APPLICATIONS
Below is a typical cooling tower system sketch. • Use of existing equipment including possibility of using Pumps in Parallel or Series Pumps can be arranged in serial or parallel to provide additional head or flow rate capacity . We know just how important the reliability and performance of your operations are to your business. A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into Hydraulic energy.Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps. A colleague and I were recently talking about the benefits of parallel pumping and how cost-effective and efficient it can be for a wide variety of applications. The following post walks you through pumps in series and in parallel so that you can get your ducks… I mean pumps… in a row – or side by side, depending on the application. Thank you. Yet, for some reason, the benefits of parallel pumping seem to be known mainly for large flow rate applications such as chilled water distribution systems. Employing a combination of in-line pumps rather than base-mounted pumps to accomplish a pumping requirement eliminates the need for pump mounting pads, grouting, and shaft alignment. When Pumps are operating in Series, the effects of Pump failure is more serious than Pumps which are set to operate in Parallel. As each chiller is enabled, the tower pump is started and, once flow is proven across the condenser, the chiller is started.
You can count on PCM pumps to keep your fluids moving smoothly as they make their way through the variety of demanding processes and applications that lie … This is because the fluid pressure increases as the continuous flow passes through each pump, much like how a multi-stage pump works.
Parallel Pump Details Basic Parallel Pump Installation Figure 1 A simple example of two parallel pumps is shown in Figure 1. When CH-1 is enabled, pump P-1 is started. If two centrifugal pumps I and II are operated in parallel, the flow rate QI+II is the sum of the flow rates of the individual pumps at the same head, i.e. How exactly it makes sense to go for them instead of single big pump? When chiller CH-2 is enabled, pump P-2 is started. Pumps in Parallel or Series Pumps can be arranged in serial or parallel to provide additional head or flow rate capacity . Typically, in critical applications such as cooling water circuits, three pumps may be installed with the normal operating mode being two running in parallel and the third being a standby unit.
Yet, for some reason, the benefits of parallel pumping seem to be known mainly for large flow rate applications such as chilled water distribution systems. The rotational energy typically comes from an engine or electric motor. _____ Keywords: pumps, parallel, series, connection, fittings, piping network, best efficient point. Flows Q1 and Q2 combine, and that is what flows through the valve: Q VALVE = Q1 + Q2 Typically, in critical applications such as cooling water circuits, three pumps may be installed with the normal operating mode being two running in parallel and the third being a standby unit. Important details like suction diffusers and isolation valves are not shown. Putting your centrifugal pumps in series, or connected along a single line, will let you add the head from each together and meet your high head, low flow system requirements.