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US 2025/0052373 A1Published application
Closed-loop net positive suction pressure control for cryogenic liquid pump
OwnerJoshua Steffen, Paul Drube +1inventors
InventorsJoshua Steffen, Paul Drube, Luke Gasperlin
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Abstract
Systems and methods for reducing cavitation of a pump in a liquid transfer system including a pump and a liquid storage tank. More particularly, systems and methods for maintaining and adjusting Net Positive Suction Pressure (NPSP) are provided to the pump.
Claims32
A cryogenic liquid transfer system comprising:
- a storage tank configured to contain a cryogenic liquid;
- a pump in fluid communication with the storage tank, wherein the pump is configured to pump liquid out of the storage tank;
- a temperature sensor and a pressure sensor configured to measure a temperature and pressure of cryogenic liquid upstream of the pump;
- a pressure-building circuit including a pressure-building valve;
- and
- a controller, wherein the controller is configured to
- determine a Net Positive Suction Pressure provided to the pump based on measurements from the temperature sensor and the pressure sensor and adjust the determined Net Positive Suction Pressure by manipulation of the pressure-building valve to provide a target Net Positive Suction Pressure to the pump.
4 more elements
A method for preventing cavitation in a cryogenic liquid transfer system including a storage tank and a pump comprising the steps of:
- determining a Net Positive Suction Pressure provided to the pump by measuring a temperature and a pressure of a cryogenic liquid upstream of the pump;
- and
- adjusting the Net Positive Suction Pressure to a target Net Positive Suction Pressure based on the measured temperature and pressure.
Dependencies are inferred from the claim text.