The present disclosure describes a method, a system, and a computer program product of performing a separation on a field flow fractionator. In an embodiment, the method, the system, and the computer program product include executing, by a computer system, a set of logical operations measuring a mass flow control valve position of a control valve connected to a mass flow controller coupled to a field flow fractionator and a pressure control valve position of a control valve connected to a pressure controller coupled to the field fold fractionator in an optimal stability state, storing, by the computer system, the valve positions to a data store as preset values, and executing, by the computer system, a set of logical operations retrieving the preset values from the data store and setting initial conditions for the controllers corresponding to the preset values, resulting in a switch mode of the field flow fractionator.

A fuel gauging system for a fuel tank containing fuel and an ullage gas in an ullage of the tank. The fuel gauging system pressurizes/depressurizes the ullage gas and measures changes in conditions of the ullage gas to determine ullage gas volume and thus volume of the fuel. The system may infer one or more values in the volume calculation to reduce the number of measurements involved. The inferred values may come from known operating characteristics of an inerting system integrated with the fuel gauging system. The system may use a control valve that operates within the limits of a climb-dive valve to generate the system response. The control valve may control delivering or receiving ullage gas from another tank to preserve the ullage gas. An inerting system may be integrated into such a paired-tank fuel gauging system.

A liquid delivery device that includes a channel having an inner section lower than 9 mm.sup.2 and inner volume lower than 50 mL, a gas mass flowmeter connected to the inlet of the channel, and a pressure control unit suitable to control pressure inside the channel by flowing gas through the gas flowmeter.

A fluid metering system for gas independent pressure and flow control through an electron microscope sample holder includes: a pressure control system that supplies gas; an inlet line providing gas from the pressure control system to the sample holder; an outlet line receiving gas from the sample holder; and a variable leak valve that controls gas flow in the outlet line. The gas flows from an upstream tank of the pressure control system through the sample holder and variable leak valve to a downstream tank of the pressure control system due to the pressure difference of the two tanks as the variable leak valve meters flow in the outlet line. Flow rates are established by monitoring pressure changes at source and collection tanks of known volumes with gas independent pressure gauges. A method of directing the gas flow to a residual gas analyzer (RGA) is also presented.

Embodiments of a kernel-level grain monitoring system include a grain camera positioned to capture bulk grain sample images of a currently-harvested grain taken into and processed by a combine harvester, a moisture sensor, and a display device. A controller architecture is coupled to the grain camera, to the moisture sensor, and to the display device. The controller architecture is configured to: (i) analyze the bulk grain sample images, as received from the grain camera, to determine an average per kernel (APK) volume representing an estimated volume of a single average kernel of the currently-harvested grain; (ii) repeatedly calculate one or more topline harvesting parameters based, at least in part, on the determined APK volume and the moisture sensor data; and (iii) selectively present the topline harvesting parameters on the display device for viewing by an operator of the combine harvester.

Embodiments of a kernel-level grain monitoring system include a grain camera positioned to capture bulk grain sample images of a currently-harvested grain taken into and processed by a combine harvester, a moisture sensor, and a display device. A controller architecture is coupled to the grain camera, to the moisture sensor, and to the display device. The controller architecture is configured to: (i) analyze the bulk grain sample images, as received from the grain camera, to determine an average per kernel (APK) volume representing an estimated volume of a single average kernel of the currently-harvested grain; (ii) repeatedly calculate one or more topline harvesting parameters based, at least in part, on the determined APK volume and the moisture sensor data; and (iii) selectively present the topline harvesting parameters on the display device for viewing by an operator of the combine harvester.

A method for operating a flowmeter is provided. The method includes the steps of measuring a fluid flow in the flowmeter, determining at least one fluid characteristic, determining a preferred algorithm of a plurality of algorithms based upon the fluid flow and the at least one fluid characteristic, and applying the preferred algorithm to an operating routine.

A fluid metering system for gas independent pressure and flow control through an electron microscope sample holder includes: a pressure control system that supplies gas; an inlet line providing gas from the pressure control system to the sample holder; an outlet line receiving gas from the sample holder; and a variable leak valve that controls gas flow in the outlet line. The gas flows from an upstream tank of the pressure control system through the sample holder and variable leak valve to a downstream tank of the pressure control system due to the pressure difference of the two tanks as the variable leak valve meters flow in the outlet line. Flow rates are established by monitoring pressure changes at source and collection tanks of known volumes with gas independent pressure gauges. A method of directing the gas flow to a residual gas analyzer (RGA) is also presented.

A pyrolysis and gasification system produce a synthesis gas and bio-char from a biomass feedstock. The system includes a feed hopper that has a flow measurement device. The system also includes a reactor that is operable in a gasification mode or a pyrolysis mode. The reactor is configured to receive the biomass feedstock from the feed hopper. The reactor is operable to provide heat to the biomass feedstock from the feed hopper to produce the synthesis gas and bio-char. The system also includes a cyclone assembly. The produced synthesis gas including the bio-char is fed to the cyclone assembly. The cyclone assembly removes a portion of the bio-char from the synthesis gas.

A pyrolysis and gasification system produce a synthesis gas and bio-char from a biomass feedstock. The system includes a feed hopper that has a flow measurement device. The system also includes a reactor that is operable in a gasification mode or a pyrolysis mode. The reactor is configured to receive the biomass feedstock from the feed hopper. The reactor is operable to provide heat to the biomass feedstock from the feed hopper to produce the synthesis gas and bio-char. The system also includes a cyclone assembly. The produced synthesis gas including the bio-char is fed to the cyclone assembly. The cyclone assembly removes a portion of the bio-char from the synthesis gas.