Abstract:
Disclosed is a pump column for use with a submersible pump in an croygenic tank, such as for use in a rail tender fueled by liquid natural gas. The pump column is configured to enable rapid removal and access to a pump submerged within a tank containing liquid natural gas.
Abstract:
A cryogenic fluid delivery system includes a tank (22) adapted to contain a supply of cryogenic liquid (26), with the tank (22) including a head space (36) adapted to contain a vapor above the cryogenic liquid (26) stored in the tank (22). A liquid withdrawal line (28) is adapted to communicate with cryogenic liquid (26) stored in the tank (22). A vaporizer (32) has an inlet that is in communication with the liquid withdrawal line (28) and an outlet that is in communication with a vapor line. A pressure building circuit (55) is in communication with the vapor delivery line and the head space (36) of the tank. The pressure building circuit (55) includes a flow inducing device (52) and a control system for activating the flow inducing device (52) when a pressure within the head space (36) of the tank drops below a predetermined minimum pressure and/or when other conditions exist.
Abstract:
An ullage tank in a vertical cryogenic storage vessel that can store a liquefied gas is described. The ullage tank includes a hollow member. The ullage tank has at least one opening that allows communication between the ullage tank and an inner vessel of the vertical cryogenic vessel. The hollow member has a first open end and a second open end. The hollow member forms a vertically disposed passage through the ullage tank. The first open end and the second open end are in communication with the inner vessel. Related methods, apparatuses, systems, techniques and articles are also described.
Abstract:
A system dispenses both liquid natural gas (LNG) and compressed natural gas (CNG). A bulk tank contains a supply of LNG which is pumped to a smaller storage tank. After the storage tank is refilled, LNG from the bulk tank is pumped to a vaporizer so that CNG is produced. The CNG may be routed to the LNG in the storage tank to condition it. It is also used to recharge a pressurizing cylinder that is placed in communication with the head space of the storage tank when it is desired to rapidly dispense LNG to a vehicle. A bank of cascaded storage cylinders alternatively may receive CNG from the vaporizer for later dispensing through the system CNG dispenser. The CNG from the vaporizer may also be dispensed directly via the system CNG dispenser.
Abstract:
A cryogenic fluid piping system is provided with two or more coupled pipe spools, each spool having an inner and outer pipe, the inner for carrying cryogenic fluid. The pipe spools are configured with a bayonet connection to allow expansion and contraction of the system without failure. A leak control device and pressure relief device are included to protect the system from catastrophic failure in the event of a cryogenic fluid leak from the inner pipe.
Abstract:
A nozzle includes a nozzle bayonet with a warm seal positioned at a distal end and a nose seal positioned at a proximal end so that a distal passage is defined between tire warm and nose seals. The nozzle also includes a nozzle poppet valve. Purge and vent lines are in fluid communication with the distal passage. A receptacle includes a receptacle poppet valve, a receptacle inner tube and a receptacle outer tube with a receptacle insulation space defined therebetween. A coupling space is defined between an outer casing and the receptacle outer lube. The receptacle coupling space receives the nozzle bayonet. The receptacle sequentially engages the warm seal and the nose seal of the nozzle during insertion of the nozzle bayonet into the receptacle coupling space with the nozzle and receptacle poppets engaging to open the nozzle and receptacle poppet valves when the nozzle bayonet is fully inserted into the receptacle coupling space.
Abstract:
A body structure includes an inlet port (15) that receives fluid from a delivery device, a first outlet port (12) that connects to a top-fill line in communication with a cryogenic tank, a second outlet port (13) that connects to a bottom-fill line in communication with a cryogenic tank and a slider tube cylinder (19). A cylinder housing (22) is connected to the body structure and has a pressure comparison cylinder with an upper volume (23) and a lower volume (27), with the latter in fluid communication with a cryogenic tank. A piston (21) slides within the pressure comparison cylinder and a piston shaft is connected to the piston. A pressure regulator (24) is in fluid communication with the upper volume of the pressure comparison cylinder and the slider tube cylinder. A slider tube (29) is connected to the piston shaft and slides within the slider tube cylinder. The slider tube cylinder directs fluid to a top-fill line through the first outlet port when a pressure in the lower volume exceeds a pressure setpoint and fluid to a bottom-fill line through the second outlet port when the pressure in the lower volume is below a pressure setpoint.
Abstract:
A flow meter assembly for a dispensing line includes a differential pressure transmitter, a pressure transmitter, a temperature transmitter and a controller in communication with each transmitter. The controller is configured to use data collected from the transmitters to determine if there is subcooling or two-phase flow of a fluid flowing through the dispensing line and to meter fluid flowing through the dispensing line if there is subcooling or no two-phase flow.
Abstract:
A vaporizer system (1) includes a defrosting function along with the ability to convert liquefied gas to a use gas. The vaporizer system includes first (10) and second (20) vaporizers and piping (11) that transfers fluid from an inlet port (80) to an outlet port (90) with a portion of the piping being between the first and second vaporizer. The system also includes a trim heater (30) and a number of valves (51-54,61-64) for regulating flow of the fluid through the transfer piping. The valves may be placed in a first configuration where vapor from the first vaporizer is heated and directed to the second vaporizer so that the second vaporizer is defrosted and a second configuration where vapor from the second vaporizer is heated and directed to the first vaporizer so that the first vaporizer is defrosted.
Abstract:
A dosing vessel includes a reservoir having an inlet and an outlet and is configured to contain a supply of a cryogenic liquid with a headspace above. The outlet is configured to be connected to a dosing arm having a dosing head. A low pressure sensor is configured to detect a vapor pressure in the headspace. A high pressure sensor is configured to detect a pressure in a bottom portion of the reservoir. An inlet valve is in fluid communication with the inlet of the reservoir and is placed in communication with a source of cryogenic liquid. A controller is in communication with the high and low pressure sensors and the inlet valve and is configured to store a preset liquid level or a preset differential pressure corresponding to the preset liquid level, to determine a measured differential pressure based on data from the high and low pressure sensors and to control the inlet valve based on the measured differential pressure and the preset liquid level or the preset differential pressure so that a liquid level of a cryogenic liquid stored in the reservoir is generally maintained at the preset liquid level.
Abstract translation:给药容器包括具有入口和出口的储器,并且构造成容纳具有在上方的顶部空间的低温液体的供应。 出口构造成连接到具有计量头的计量臂。 低压传感器被配置为检测顶部空间中的蒸汽压力。 高压传感器构造成检测储存器底部中的压力。 入口阀与贮存器的入口流体连通并且被放置成与低温液体源连通。 控制器与高压力传感器和低压力传感器以及入口阀进行通信,并且被配置为存储与预设液位相对应的预设液位或预设压差,以基于来自高位和低位压力传感器的数据来确定测量差压 低压传感器,并基于所测量的压差和预设液位或预设压差来控制入口阀,使得储存在储存器中的低温液体的液位通常保持在预设液位。 p >