摘要:
A portable liquid oxygen (PLOX) unit and method of filling. The LOX unit includes a LOX container. An inlet line communicates LOX from a LOX supply to an the LOX container, and an outlet line communicates LOX from the LOX container ultimately for consumption by a user. A vent line communicate the interior of the LOX container to ambient atmosphere. A vent valve is coupled to the vent line to selectively communicate the LOX container to the ambient atmosphere. An auto shutoff assembly is associated with vent line to substantially block the vent line when the LOX in the LOX container reaches a predetermined level. A reset element associated with the auto shutoff assembly causes at least a portion of the auto shutoff assembly to unblock the vent line for subsequent filling.
摘要:
A system for monitoring a pressurized container is provided. The system includes a non-reclosing pressure release device (40) and an activating mechanism (13) configured to open the non-reclosing pressure release device (40). The activating mechanism is activated by a control (50), based on a signal received by the control from a sensor (44). The activating mechanism (13) may be selected from a group including actuators, pyrotechnic devices, and solenoids.
摘要:
Disclosed is a simple, analytical method that can be utilized by hydrogen filling stations for directly and accurately calculating the end-of-fill temperature in a hydrogen tank that, in turn, allows for improvements in the fill quantity while tending to reduce refueling time. The calculations involve calculation of a composite heat capacity value, MC, from a set of thermodynamic parameters drawn from both the tank system receiving the gas and the station supplying the gas. These thermodynamic parameters are utilized in a series of simple analytical equations to define a multi-step process by which target fill times, final temperatures and final pressures can be determined. The parameters can be communicated to the station directly from the vehicle or retrieved from a database accessible by the station. Because the method is based on direct measurements of actual thermodynamic conditions and quantified thermodynamic behavior, significantly improved tank filling results can be achieved.
摘要:
An apparatus and corresponding method for dispensing compressed gas to a receiving tank is provided which includes a compressed gas source, a valve for controlling the flow of the compressed gas between the compressed gas source and the receiving tank, an electronic controller, a conduit between the valve and the receiving tank, and a density sensor for sensing the density of the compressed gas inside the receiving tank. The density sensor may be a capacitive sensor, a vibrating element sensor, or a nucleonic sensor. The electronic controller stores a predetermined set point density and the density sensor measures the density of the compressed gas in the receiving tank. The electronic controller periodically compares the density of the compressed gas with the predetermined set point density and controls the flow of compressed gas through the valve.
摘要:
A device (1) for preventing overfilling of containers (B), in particular containers intended to contain liquefied gases, comprises: - a valve body (3) in which a gas pipe (5) is defined, - a closure means (7) axially movable in the valve body (3) away from and towards a valve seat (8) in order, respectively, to open and to shut off the gas pipe (5), - an actuator (16), comprising a float (20), capable of exerting a thrust (F) in order to urge the closure means (7) away from the valve seat (8), - a cam mechanism (21) for exerting the thrust (F) on the closure means (7) in an ascending phase of the float (20) until a preimposed limit position, corresponding to a maximum filling level, is reached, - a lever mechanism (26) for exerting the thrust (F) on the closure means in a first part of a descending phase of said float (20), starting from said limit position.
摘要:
A method and apparatus for dispensing compressed gas to a receiving tank is provided where the initial density in the tank is determined, and the quantity of compressed gas to be transferred is calculated and delivered based on the initial density and a desired final density.
摘要:
An improved apparatus and method for monitoring the levels of propane or other consumable liquid in remotely located storage tanks and coordinating delivery of liquid to those tanks, including an improved method of using the remote monitoring data to identify out-of-ordinary conditions at remote tanks, optimally schedule purchases or deliveries, improve safety, and more efficiently operate a propane dealership. More accurate and timely information concerning the status of customer tanks serves to improve operational efficiencies and increase safety. Data received from remote sensors can be collected and organized so that it is easily understood and utilized through the implementation of a user interface accessible via the Internet that allows the information to be presented in an efficient graphical and contextual fashion. Operational efficiencies can also be improved by calculating site-specific Degree-days and K-factors for each tank and by taking historical propane usage for each tank, weather conditions, and projected fuel usage into account.
摘要:
A method and apparatus for dispensing compressed gas to a receiving tank is provided where the initial density in the tank is determined, and the quantity of compressed gas to be transferred is calculated and delivered based on the initial density and a desired final density.