The present disclosure generally relates to systems and methods for purging water or gas from a fuel cell system. The fuel cell system may include a multi-phase valve system and/or a separate valve system. The opening and closing of the valve systems for removing gas and water is controlled by a controller,

The disclosure provides a blowpipe assembly for removing at intervals liquid, such as pulled from a knockout assembly, having a three-way electrically operated valve, tuning fork level sensors, and access to the blowpipe interior.

The disclosure provides a blowpipe assembly for removing at intervals liquid, such as pulled from a knockout assembly, having a three-way electrically operated valve, tuning fork level sensors, and access to the blowpipe interior.

A method of monitoring a low water volume of a water circulation system is disclosed that includes detecting an auxiliary measurement associated with an ancillary device fluidly coupled with a reservoir of water in a water circulation system and then determining whether the ancillary device is performing under a low water volume operation. The low water volume operation is based upon a comparison between at least the detected auxiliary measurement of the ancillary device and a condition associated with a performance of the ancillary device under the low water volume operation.

A method of monitoring a low water volume of a water circulation system is disclosed that includes detecting an auxiliary measurement associated with an ancillary device fluidly coupled with a reservoir of water in a water circulation system and then determining whether the ancillary device is performing under a low water volume operation. The low water volume operation is based upon a comparison between at least the detected auxiliary measurement of the ancillary device and a condition associated with a performance of the ancillary device under the low water volume operation.

A fluid heating apparatus for heating fluid on a fluid path may comprise a fluid pump, a fluid heater, a temperature sensor to sense fluid temperature and generate a temperature signal, and a temperature control assembly configured to control the temperature of the fluid. The control assembly may comprise a target temperature input to receive a target temperature, a pump control to control operation of the fluid pump to control a flow rate of the fluid, and a heater control to control operation of the fluid heater to control a degree of heat output by the fluid heater. The temperature control assembly may be configured to increase and decrease fluid flow along the fluid path and to increase and decrease heat output of the fluid heater to control the temperature of the fluid at the fluid outlet.

A fluid heating apparatus for heating fluid on a fluid path may comprise a fluid pump, a fluid heater, a temperature sensor to sense fluid temperature and generate a temperature signal, and a temperature control assembly configured to control the temperature of the fluid. The control assembly may comprise a target temperature input to receive a target temperature, a pump control to control operation of the fluid pump to control a flow rate of the fluid, and a heater control to control operation of the fluid heater to control a degree of heat output by the fluid heater. The temperature control assembly may be configured to increase and decrease fluid flow along the fluid path and to increase and decrease heat output of the fluid heater to control the temperature of the fluid at the fluid outlet.

The invention relates to the field of measurement technology, and specifically to methods for monitoring the filling of railway tanks with liquid products, petroleum, petroleum products, petrochemical products, and food products, and may be used for monitoring the level to which railway tank cars are filled during the loading of liquid products itself in order to avoid (prevent) the overfilling or underfilling of tank cars. A method for monitoring the level to which railway lank cars are filled during the loading of liquid products is characterized in that, prior to beginning to fill a tank, a calculated tank loading level (H.sub.1) is determined on the basis of the calculated temperature (t°.sub.calculated) of a product to be loaded, the calculated loading level (H.sub.1) is marked with the help of a load level monitoring device, which device includes a rod having a bar which is mounted at the calculated loading level (H.sub.1), and which device is positioned within the tank. The next step involves visually monitoring the moment at which the level of the product to be loaded reaches the calculated loading level (H.sub.1) marked by the bar. During loading of the product, a thermal imaging device is used for measuring the actual temperature (t°.sub.current) of the product to be loaded, wherein the calculated tank loading level (H.sub.1) is adjusted if the actual temperature (t°.sub.current) increases or decreases relative to the calculated temperature (t.sub.calculated). A device for monitoring the level to which railway tank cars are filled during the loading of liquid products includes, positioned inside a tank, a rod with a bar, which bar is mounted at the calculated tank loading level (H.sub.1), and a thermal imaging device, intended for measuring the temperature of the product to he loaded. The technical result consists in increasing tank loading precision by monitoring the actual temperature of a product to be loaded, and adjusting a calculated loading level if the temperature changes relative to the calculated temperature.

A control gate adapted to be installed across a channel for liquids. The control gate includes a barrier member with a side member that has a circular arcuate section, the barrier member being pivotally mounted at or adjacent to the base of the channel; and a drive for raising and lowering the barrier member. The drive includes a cable, motor and first and second pulleys. The first pulley is coupled to the motor, the cable is secured to opposite first and second ends of the arcuate section, with the second pulley being adjacent to the arcuate section. The cable passes along the arcuate section from the one end to pass under the second pulley in contact therewith, is looped around the first pulley, above the second pulley, then passes under the second pulley and is secured to the second end of the arcuate section.

A control gate adapted to be installed across a channel for liquids. The control gate includes a barrier member with a side member that has a circular arcuate section, the barrier member being pivotally mounted at or adjacent to the base of the channel; and a drive for raising and lowering the barrier member. The drive includes a cable, motor and first and second pulleys. The first pulley is coupled to the motor, the cable is secured to opposite first and second ends of the arcuate section, with the second pulley being adjacent to the arcuate section. The cable passes along the arcuate section from the one end to pass under the second pulley in contact therewith, is looped around the first pulley, above the second pulley, then passes under the second pulley and is secured to the second end of the arcuate section.