The phrase "a variable speed pump" is correct and usable in written English.
You can use it when referring to a pump that can operate at different speeds, often used in contexts related to engineering, plumbing, or fluid dynamics.
Example: "The system requires a variable speed pump to efficiently manage the flow of water based on demand."
Alternatives: "adjustable speed pump" or "multi-speed pump".
The tailings flowrate controlled by a variable speed pump was used as the main control variable.
The first uses a constant flow pump, while the second and third control schemes employ a variable speed pump, where the solar collector (SC) set-point temperature could be either fixed or adjusted to the required demand.
Major modifications of the existing elutriation devices include using a variable speed pump, changing the glass column to plastic, and adding screens at the flow inlet for more uniform velocity distribution while making the column shorter.
The sand column was then saturated with deionized water by allowing upward flow to minimize air entrapment using a variable speed pump (Fluid Metering, Syosset, NY, USA) until steady-state flow condition was achieved (Fig. 2).
Gels were run in 0.5 × TBE at 14°C for 18 hours over night, with a fixed angle of 120°, switching times from 5 sec to 1 sec and 5.9 V/cm using a Chef-DRIII and a Mini Chiller model 1000 with a variable speed pump (BioRad).
Electrophoresis was conducted in 0.5 × TBE at 14°C, 5.9 V/cm, with a fixed angle of 120°, usually with switching times from 5 sec to 15 sec for 18 hours using a Chef-DRIII and a Mini Chiller model 1000 with a variable speed pump (BioRad).
The results reveal that the use of a variable-speed pump constitutes the most effective and profitable solution, and its superiority is more pronounced for less dispersed wind power potential.
The paper aims to develop a novel pitch control system for a large wind turbine driven by a variable-speed pump-controlled hydraulic servo system.
To perform practical pitch control experiments, a full-scale test rig of the hydraulic pitch control system for a 2 MW wind turbine's blade, including a novel pitch control mechanism, a variable-speed pump-controlled hydraulic servo system, a disturbance system and a PC-based control system, is designed and set up.
The working alternative required the coupling of a mechanical pump (QV variable speed pump, Fluid metering, Inc., NY) with the illustrated custom made jet pump.
Savings about 95% were obtained when one variable speed pump group was included in the optimal solution.
