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Centrifugal Pumps II
Published in Hauser Barbara A., Practical Hydraulics Handbook, 2017
Submersible pumps are vertical, close-coupled, heavy duty centrifugal pumps designed to work submerged in the water which they are pumping. There is no suction piping, and the pump impeller is at the very bottom of the unit. Both motor and pump are submerged. The motor is watertight, and double sealed from the surrounding water by oil or air. Better quality motors are equipped to signal an alarm when a problem senses leakage in the outer seal. Wastewater submersibles are designed to be non-clogging, and should easily pass 3 inch solids. A special design is the grinder pump, which incorporates a stainless steel knife blade on the inlet side of the impeller to chop solids to a slurry for pumping through small diameter force mains. Submersible pump capacities range from 50 to 7000 gpm; heads range from 15 to 200 ft., and power requirements range from Vi to over 100 hp.
Pumping Equipment
Published in John E. Schaufelberger, Giovanni C. Migliaccio, Construction Equipment Management, 2019
John E. Schaufelberger, Giovanni C. Migliaccio
Submersible pumps are centrifugal pumps that have their impellers closely connected to electric motors in a single housing that normally operates below the surface of the water. They require no suction hose and are designed to operate partly or fully submerged. Submersible pumps are widely used for dewatering foundations, sumps, and coffer dams. They typically have lower efficiency than non-submersible centrifugal pumps (generally less than 60%). These pumps are manufactured in sizes from 1.5 inches through 14 inches and have pumping capacities up to 900 gallons per minute. A typical submersible pump is illustrated in Figure 21.4.
Pump Types and Materials (Special Reliability Considerations)
Published in Heinz P. Bloch, Allan R. Budris, Pump User’s Handbook, 2021
Heinz P. Bloch, Allan R. Budris
Conventional sewage pumps are offered in two basic configurations, dry pit (Figure 13-25) and submersible (Figure 13-26). Submersible pumps are currently more popular due to the simplified and more compact installation requirements. No pump room is needed and concern over possible flooding of a non-submersible motor is eliminated. The reliability of submersible motors and mechanical seals supplied by competent manufacturers meets all reasonable expectations.
The impact of rock fracturing and pump intake location on the thermal recovery of a standing column well: model development, experimental validation, and numerical analysis
Published in Science and Technology for the Built Environment, 2019
Gabrielle Beaudry, Philippe Pasquier, Denis Marcotte
Submersible pumps are centrifugal pumps that work while submerged in water. They consist of (1) a series of impellers that accelerate the fluid and create output water pressure and (2) an electric motor that is attached below the system to spin the impellers. Friction of moving components in the pump motor can cause mechanical losses that are meant to transfer in the water surrounding the pump to prevent overheating. The magnitude of this heat gain in the well can be assessed by consulting the published pump curve, which indicates the pump overall efficiency that is a ratio of the energy delivered by the pump to the energy supplied to the pump shaft, as presented in the section on the model development.