A system for precision liquid delivery includes a gas reservoir having a known volume. The system has a tightly load-coupled pneumatic driver (a TLCP driver) that is configured to receive input power to cause the TLCP driver to move gas into the gas reservoir to produce a gas drive pressure. A valve is configured to couple the gas reservoir with a fluid reservoir having an unknown volume. The valve is further configured to selectively isolate or pneumatically couple pressures in the gas reservoir and the fluid reservoir. A gas-fluid interface couples pressure in the fluid reservoir to pressure in a fluid path. The fluid path is configured so that the fluid drive pressure driving the liquid in the fluid path is substantially the same as the fluid reservoir pressure. The system also has a pressure sensor configured to detect pressure in the gas reservoir and/or the fluid reservoir.

A flow control system for controlling flow in a system of valves connected to a splitter wherein a pressurized fluid is supplied to the splitter by a motor-driven pressurizer, the flow control system comprising: a plurality of flow sensors connected individually at an output of one of the valves to measure output flow from connected valve; a plurality of flow controllers connected individually to one of the valves for outputting a control signal controlling an opening angle of that particular valve in response to an output from a flow sensor connected at the output of that particular valve and an outlet setpoint provided for that particular valve; a main pressure sensor for measuring pressure of fluid output from the pressurizer; a main flow controller for adjusting operation of the motor driving the pressurizer; and a main system controller configured to set the main pressure setpoint based on the control signals.

An automatic dual pump assembly for a pumped refrigerant cooling system including a refrigerant reservoir for receiving a refrigerant fluid includes a first pump having a first pump inlet and a first pump outlet, a first variable frequency drive coupled to the first pump, a second pump having a second pump inlet and a second pump outlet, a second variable frequency drive coupled to the second pump, and a three-way valve having an input arm fluidly coupled to the refrigerant reservoir, a first outlet arm fluidly coupled to the first pump inlet, and a second outlet arm coupled to the second pump inlet. The first pump outlet and the second pump outlet are coupled to a refrigerant supply line, and the three-way valve selectively controls flow of the refrigerant fluid to one or both of the first pump and the second pump.

A fluid metering system for accurately measuring and dosing one or more fluids. The fluid metering system generally includes a closed loop feedback system that monitors the volume of liquid chemical input into a system over a period of time. Based on the measured amount of chemical input into a system over a period of time, the system calculates whether or not an adjustment is required for the next input of chemical. The various embodiments utilize a measuring tube that is filled with a liquid chemical. A pressure sensor measures the pressure of the chemical in the measuring tube when filled and after emptied to calculate the total volume of chemical input into the system.

A system includes a plurality of mobile fuel distribution stations. Each mobile fuel distribution station includes a mobile trailer, a pump, a manifold, a plurality of hoses, a plurality of fuel caps connected or connectable with the hoses and attachable on fuel tanks of pieces of equipment, a plurality of valves, and a plurality of fuel level sensors operable to generate signals indicative of fuel levels in the fuel tanks. The mobile fuel distribution station is configured to operate the pump responsive to a low fuel threshold to provide fuel to the manifold, from the manifold to the valves, and from the valves through the hoses. A server is operable to communicate with the mobile fuel distribution stations. An electronic device is operable to communicate with the server and display the fuel levels in real-time.

A water gathering and distribution system and related techniques for operating in freezing environmental conditions are disclosed. The system may include a water diverter unit or a water flow regulation unit configured to receive water from a water source situated at a location that is remote, inaccessible (or difficult to access), and/or experiences freezing environmental conditions and to deliver a controlled volume of that water for downstream use. The system further may include a water supply unit configured to receive that water and to supply it to downstream snowmaking equipment. In some instances, the supply unit also may cool the water to a temperature suitable, for example, for snowmaking. In a general sense, the disclosed system may be considered modular, in that multiple system components may be placed in flow communication with one another, as desired, to provide a distributed network of water collection and distribution elements.

A pumping energy savings estimator is provided which, based on valve opening data collected for a control valve of a pump-valve system operating in an industrial process, determines an actual maximum (p.sub.org, 50% open) of valve operating region of the control valve of the pump-valve system. User can select a new maximum (p.sub.new, 70% open) of valve operating region for the control valve. Then the estimator, based on the determined actual maximum of valve operating region and the selected new maximum of valve operating region, energy saving potential (p.sub.save) in the pump-valve system. The potential energy savings may be put into practice by replacing the original pump with a new smaller pump, or more preferably, replacing or processing the impeller of the original pump, such that the control valve will operate with the selected new optimal maximum opening of valve operating region.

A hydraulic valve assembly includes an algorithm stored in an internal memory of the hydraulic valve assembly that determines a spool correction command based on a flow demand which is calculated for obtaining a target single port pressure or a target delta pressure using one or more port pressure measurements. The spool correction command is sent to an upper level controller of the hydraulic valve assembly, and the upper level controller uses the spool correction command to obtain an optimal displacement of a spool inside the valve assembly.

A modular multi-channel syringe pump assembly includes a chassis in which are mounted two or more parallel syringe banks. Each syringe bank includes a syringe for retaining a fluid in a chamber with a syringe plunger for drawing fluid into or forcing fluid out of the chamber. A syringe drive actuator includes a syringe drive motor and a mechanical linkage for activating the syringe. At least one position sensor detects syringe position and generates a position signal corresponding to the syringe position. A controller receives the position signal for each syringe bank and generates control signals for operation of the two or more syringe banks.

A system and method removes well fluids, which include gas and liquids, from a storage tank. The storage tank has a gas relief valve that opens to admit atmospheric air into the storage tank when the pressure of a gas cap decreases below a vacuum threshold pressure. Well fluids flow into the storage tank and the level of liquid is monitored. When the level reaches a first level, a pump is operated by a controller to remove liquid from the storage tank. The pressure in the gas cap is monitored while the pump is operating. The speed of the pump is adjusted to maintain the gas cap pressure above the predetermined pressure and avoid the introduction of atmospheric air into the gas cap.