Systems, devices, and methods for controlling the temperature of a CO2 pump
AssigneeWaters Technologies Corporation
InventorsAbhijit Tarafder, Jason Hill, Joshua Shreve
Life of this patent
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Abstract
Methodologies, systems, and computer-readable media are provided for controlling the mass flow rate within a CO2 based chromatography system. The pressure within a CO2 pump is measured and received at a computing system, and the computing system retrieves a target temperature value corresponding to the new pressure measurement within the CO2 pump. The computing system then generates a temperature control command that controls a CO2 pump heater or cooler in order to achieve the target temperature value at the CO2 pump. Thus, a target mass flow rate of CO2 from the CO2 pump is achieved by adjusting the temperature of the CO2 pump in response to changes in pressure.
Claims12
A method for controlling mass flow rate within a CO2-based chromatography system comprising:
- measuring a change in pressure within a CO2 pump using a pressure sensor;
- receiving a new pressure measurement at a computing system from the pressure sensor;
- retrieving a target temperature value corresponding to the new pressure measurement from a database using the computing system;
- generating a temperature control command, using the computing system, the temperature control command configured to control a CO2 pump heater or cooler in order to achieve the target temperature value at the CO2 pump;
- and
- maintaining a constant mass flow rate of CO2 from the CO2 pump by achieving the target temperature value at the CO2 pump.
A system for controlling mass flow rate from a CO2 pump, the system comprising:
- a pressure sensor configured to measure a change in pressure within the CO2 pump;
- a computing system configured execute a temperature control module configured to:
- receive a new pressure measurement from the pressure sensor;
- retrieve a target temperature value corresponding to the new pressure measurement from a database;
- and
- generate a temperature control command configured to control a CO2 pump heater or cooler in order to achieve the target temperature value at the CO2 pump;
- and
- the CO2 pump heater or cooler configured to execute the temperature control command and achieve a target mass flow rate of CO2 from the CO2 pump by achieving the target temperature value at the CO2 pump.
Dependencies are inferred from the claim text.