Abstract:
A method and apparatus for providing cryogenic cooling to HTS devices, in particular those that are used in high-voltage electric power applications. The method involves pressurizing liquid cryogen to above one atmospheric pressure to improve its dielectric strength, while sub-cooling the liquid cryogen to below its saturation temperature in order to improve the performance of the HTS components of the device. An apparatus utilizing such a cooling method consists of a vessel that contains a pressurized gaseous cryogen region and a sub-cooled liquid cryogen bath, a liquid cryogen heating coupled with a gaseous cryogen venting scheme to maintain the pressure of the cryogen to a value in a range that corresponds to optimum dielectric strength of the liquid cryogen, and a cooling system that maintains the liquid cryogen at a temperature below its boiling point to improve the performance of HTS materials used in the device.
Abstract:
A method and apparatus for providing cryogenic cooling to HTS devices, in particular those that are used in high-voltage electric power applications. The method involves pressurizing liquid cryogen to above one atmospheric pressure to improve its dielectric strength, while sub-cooling the liquid cryogen to below its saturation temperature in order to improve the performance of the HTS components of the device. An apparatus utilizing such a cooling method consists of a vessel that contains a pressurized gaseous cryogen region and a sub-cooled liquid cryogen bath, a liquid cryogen heating coupled with a gaseous cryogen venting scheme to maintain the pressure of the cryogen to a value in a range that corresponds to optimum dielectric strength of the liquid cryogen, and a cooling system that maintains the liquid cryogen at a temperature below its boiling point to improve the performance of HTS materials used in the device.
Abstract:
An apparatus and method for charging a gas storage and dispensing vessel with gas to a predetermined pressure level, e.g., a gas to be employed in a semiconductor manufacturing operation such as a hydride, halide or organometallic reagent gas. In the gas charging, a source gas is liquefied, e.g., in a cryotrap, and then gasified in closed flow communication with the vessel to introduce the gas thereinto, and such liquefaction/gasification steps are carried out alternatively and repetitively, to charge the vessel in a step-wise, progressive fashion with gas, until a full fill state is achieved, with the contained gas at the predetermined pressure level.
Abstract:
A mechanical support mechanism for a device operating at cryogenic temperature where the cryogenic container vessel is situated within another larger container vessel. The apparatus provides means to secure the inner vessel to the outer vessel through a bottom-support component and a side-support component. These components consist of mating structures of different configurations that provide inner vessel with constraints for horizontal, lateral, vertical and rotational degrees of freedom while at the same time achieving minimal physical contacts between the inner and outer container vessels to reduce heat leak into the inner cryogenic container.
Abstract:
This invention relates generally to an improvement in low pressure storage and dispensing systems for the selective storing of gases having Lewis acidity or basicity, and the subsequent dispensing of said gases at pressures, e.g., generally below 5 psig and typically below atmospheric pressure, by modest heating, pressure reduction or both. The improvement resides in storing the gases in a reversibly reacted state within a reactive liquid having opposing Lewis basicity or acidity.
Abstract:
A relatively low pressure inert gas hazard suppression system (20) is provided which is designed to protect a room (22) or the like from the effects of fire or other hazard. The system (20) includes a plurality of pressurized inert gas cylinders (24) each equipped with a valve unit (26); each valve unit (26) is in turn coupled via a conduit (28) to a delivery manifold (30). The respective valve units (26) are operable to deliver gas from the cylinders (24) at a generally constant pressure (usually around 10-100 bar) throughout a substantial portion of the time of gas delivery, to thereby provide effective hazard suppression without the need for expensive high-pressure gas handling and distribution hardware and a reduction in room venting area due to lower room over-pressurization. Each valve unit (26) has a valve body (48) and a shiftable piston-type sealing member (56). Gas pressure from the cylinder (24) and a spring assembly (184) biases the member 56 to the valve open position, this being counterbalanced by gas pressure within equalization and modulation chambers (180, 182) provided in the valve unit (26). When a hazard is detected, the valve units (26) are actuated by draining of gas from the modulation chambers (182), allowing gas flow from the cylinders (24). As gas discharge proceeds, gas flows into and out of the modulation chambers (182) so as to achieve the desired generally constant pressure gas output. Near the end of gas discharge, the spring assembly (184) becomes predominant and holds the valve unit (26) open until all gas is discharged.
Abstract:
Substantially rectangular-shaped tanks are provided for storing liquefied gas, which tanks are especially adapted for use on land or in combination with bottom-supported offshore structure such as gravity-based structures (GBS). A tank according to this invention is capable of storing fluids at substantially atmospheric pressure and has a plate cover adapted to contain fluids and to transfer local loads caused by contact of said plate cover with said contained fluids to a grillage of stiffeners and stringers, which in turn is adapted to transfer the local loads to an internal truss frame structure. Methods of constructing these tanks are also provided.
Abstract:
An assembly for securing SCUBA gear on a boat without increased use of deck space is provided. A platform is disposed above the deck of a boat. A retainer is disposed above the platform. An opening is disposed within the retainer dimensioned to receive a SCUBA tank therein. The platform may form the upper surface of a cabinet. The cabinet having at least one SCUBA tank supporting member therein. The SCUBA tank supporting member having a radiused surface for securely retaining the SCUBA tank within the cabinet. The support member has a first end and a second end, the first end being higher than the second end.
Abstract:
Substantially rectangular-shaped tanks are provided for storing liquefied gas, which tanks are especially adapted for use on land or in combination with bottom-supported offshore structure such as gravity-based structures (GBS). A tank according to this invention is capable of storing fluids at substantially atmospheric pressure and has a plate cover adapted to contain fluids and to transfer local loads caused by contact of said plate cover with said contained fluids to a grillage of stiffeners and stringers, which in turn is adapted to transfer the local loads to an internal truss frame structure. Methods of constructing these tanks are also provided.
Abstract:
A method and a device for transporting a container capable of storing a pressurized substance and having a threaded fitting. The method and device enables a person to easily transport the container while being exposed to a minimal risk of injury. The device includes a grasping member with a threaded portion adapted to mate with the threaded fitting of the container and can include a handle that is remote from the threaded portion. The device can also include a roller having a connector for attachment to the container. The method includes steps of mating the threaded portion of the grasping member to the threaded fitting of the container to attach the grasping member to the container, and attaching the roller to the container. A person can apply a force to the grasping member, preferably through the handle, to roll the container on the roller from one location to another location.