Flow Meter Assembly
AssigneeChart Inc.
InventorRoland Wagner
Life of this patent
Estimating the term…
Abstract
A flow meter assembly for a dispensing line includes a differential pressure transmitter, a pressure transmitter, a temperature transmitter and a controller in communication with each transmitter. The controller is configured to use data collected from the transmitters to determine if there is subcooling or two-phase flow of a fluid flowing through the dispensing line and to meter fluid flowing through the dispensing line if there is subcooling or no two-phase flow.
Claims22
A flow meter assembly for a dispensing line comprising:
- a differential pressure transmitter;
- a pressure transmitter;
- a temperature transmitter;
- and
- a controller in communication with the differential pressure transmitter, the pressure transmitter and the temperature transmitter;
- wherein the controller is configured to use data collected from the differential pressure transmitter, the pressure transmitter and the temperature transmitter to determine if there is subcooling or two-phase flow of a fluid flowing through the dispensing line and to meter fluid flowing through the dispensing line if there is subcooling or no two-phase flow.
A cryogenic fluid dispensing system comprising;
- a tank defining an area that holds cryogenic liquid;
- a dispensing line in liquid communication with the tank and configured to direct cryogenic liquid from the tank to a use device;
- a dispensing valve associated with the dispensing line;
- and
- a flow meter assembly, the flow meter assembly comprising:
- a differential pressure transmitter;
- a temperature transmitter;
- a pressure transmitter;
- and
- a controller in communication with the differential pressure transmitter, the temperature transmitter, the pressure transmitter and the dispensing valve;
- wherein the controller is configured to use data collected from the differential pressure transmitter, the temperature transmitter and the pressure transmitter to determine if there is two-phase flow or subcooling of a fluid flowing through the dispensing line.
A method of monitoring flow in a cryogenic fluid dispensing system comprising the steps of:
- a. storing cryogenic fluid in a tank;
- b. directing cryogenic fluid so that it flows through a dispensing line to a use device;
- c. monitoring a temperature and a discharge pressure of the cryogenic fluid flowing in the dispensing line;
- d. determining a saturation pressure of the cryogenic fluid flowing in the dispensing line using the monitored temperature;
- e. comparing the discharge pressure to the saturation pressure;
- f. metering the cryogenic fluid flowing in the dispensing line as long as the discharge pressure is a predetermined level above the saturation pressure;
- g. terminating metering of the cryogenic fluid flowing in the dispensing line when the discharge pressure is less than the predetermined level above the saturation pressure.
A flow meter assembly for a dispensing line comprising:
- a flow meter;
- a pressure transmitter;
- a temperature transmitter;
- and
- a controller in communication with the pressure transmitter, the temperature transmitter and the flow meter;
- wherein the controller is configured to use data collected from the pressure transmitter and the temperature transmitter to determine if there is subcooling or two-phase flow of a fluid flowing through the dispensing line and data collected from the flow meter to meter fluid flowing through the dispensing line if there is subcooling or no two-phase flow.
Dependencies are inferred from the claim text.