Abstract:
A method for producing pressurized liquefied natural gas and a production system therefor are provided. The method for producing pressurized liquefied natural gas includes: performing a dehydration process to remove water from natural gas supplied from a natural gas field, without a process of removing acid gas from the natural gas; and performing a liquefaction process to produce pressurized liquefied natural gas by liquefying the natural gas, which has undergone the dehydration process, at a pressure of 13 to 25 bar and a temperature of −120 to −95° C., without a process of fractionating natural gas liquid (NGL). Accordingly, it is possible to reduce plant construction costs and maintenance expenses and reduce LNG production costs. In addition, it is possible to guarantee high economic profit and reduce payback period in small and medium-sized gas fields, from which economic feasibility could not be ensured by the use of a conventional method.
Abstract:
A fuel vessel assembly for a fuel cell-powered vehicle and a method of increasing the structural rigidity of a fuel cell-powered vehicle. A vessel for storage of hydrogen or related fuel cell-compatible fuel is rigidly attachable to a vehicular frame or related load-bearing structure through one or more shells that extend from the vessel. Loads imparted to one or more of the shell, vessel frame are transmitted between them through the connection between the assembly and the frame such that a load-bearing capability inherent in the frame is enhanced by the assembly.
Abstract:
The present invention relates to a system and compact method of bottling gas (1), that can be installed in any the retail sales establishment to bottle cylinders (3) directly to the consumer, or in vehicles to bottle the cylinders (3) in the residences where they are consumed, the compact system of bottling gas (1) comprising a device for transfer of gas, from a reservoir (2) to gas cylinders (3) located in closed compartments (4), allowing the consumer a choice of quantity of gas and further eliminating the inconveniences of exchanging the cylinder (3) or its transport to remote locations for refill.
Abstract:
An LNG system generally comprises a primary container, and a secondary container positioned around the primary container. The secondary container generally comprises a first end wall, a second end wall, and at least two side walls. At least one of the walls is fabricated from a plurality of prefabricated wall panels. Each of the wall panels is fabricated from a combination of concrete and steel. The wall panels are preferably prefabricated offsite, and then transported to the construction site where they are adjoined together in end-to-end fashion to form walls. A method for constructing a full containment LNG system is also provided. In one embodiment, walls and a roof for a secondary container are assembled, but leaving an end open. At least one primary tank is brought into the secondary container. A second end wall is then erected to form the enclosure for the secondary container.
Abstract:
A pressure tank including, a tank wall; a supporting member which includes fiber reinforced plastic and supports an outer surface of the tank wall; a supersonic wave sensor which is connected to the tank wall, and which detects a sonic wave propagated in the tank wall; and an internal abnormality determination member which is connected to the supersonic wave sensor, and which determines whether an internal abnormality exits in the tank wall, wherein the internal abnormality determination member determines the existence of the internal abnormality based on the detection result during gas is charged into the pressure tank, and outputs an abnormality signal when the internal abnormality was determined to exist.
Abstract:
The present invention is directed to a maritime vessel that uses a solid or semi-solid material to enclose substantially natural gas storage vessels in the hold of the vessel.
Abstract:
An energy storage bridge includes a plurality of bridge girders and a bridge deck. The bridge girders include multiple steel pipes for carrying loads and storing energy in a form of compressed air contained therein and a plurality of web plates. The bridge deck is disposed on top of the bridge girders and configured for loading live loads. The steel pipes are assembled in at least a row aligned vertically. Each web plate connects a row of the steel pipes at a center line separating the steel pipes into two halves. Alternatively, a steel pipe is connected by two webs at the two sides of the pipe. Each bridge girder forms an energy storage unit between two consecutive movement joints of the energy storage bridge. Every two consecutive storage units are joined by a high pressure flexible pipe to form a giant energy storage unit. Each energy storage unit is provided with inlet and outlet pipes to in-take compressed air from electric compressors driven by the grid power or by regenerated powers, and to release the compressed air to generate electricity. The bridge girders are disposed at a predetermined transverse spacing across the width of the bridge deck and configured for supporting the bridge deck as a roadway surface.
Abstract:
Methods, apparatuses and systems directed to clathrate hydrate modular storage, applications and utilization processes. In one implementation, the present invention provides a method of creating scalable, easily deployable storage of natural gas and thermal energy by assembling an array of interconnecting, modular gas clathrate hydrate storage units.
Abstract:
A remaining gas amount calculating device includes a hydrogen tank, an opening/closing valve arranged to deliver hydrogen gas from inside the hydrogen tank, a decompression valve arranged to decompress hydrogen gas delivered from the hydrogen tank, a pressure sensor arranged to measure the pressure of hydrogen gas decompressed with the decompression valve, and a power source system controller arranged to determine the remaining gas amount in the hydrogen tank by calculating the gas pressure in the hydrogen tank based on the hydrogen gas pressure measured with the pressure sensor. The relationship between pressures in a primary chamber and a secondary chamber of the decompression valve is monotonical such that when the pressure in the primary chamber increases, the pressure in the secondary chamber also increases; and when the pressure in the primary chamber decreases, the pressure in the secondary chamber also decreases. The remaining gas amount calculating device makes it possible to calculate the amount of gas remaining in a gas container without using a gas pressure measuring device that measures directly the pressure in the gas container.
Abstract:
This invention relates to methods and systems for reliable ultra-high purity (UHP) helium gas supply and maintaining dedicated onsite inventory. Specifically, the invention employs multiple ISO containers whereby vaporized UHP helium in the standby ISO container(s) is used to build-up pressure in the online ISO container. The thermal shields of the ISO containers can be used to decrease heat leaks into the backup ISO container thereby decreasing helium vaporation rate and the amount of gas needed to be withdrawn in order to maintain the maximum allowable working pressure (MAWP) of the vessel. An even lower supply rate is possible by drawing UHP helium gas using an economizer valve but maintaining liquid in the ISO container. This makes it possible to efficiently manage the supply rate, from low flows to higher flow requirements, and to optimize UHP helium draw rate from the storage vessels. A further advantage is that UHP helium gas sent to the customer is of higher purity since it comes directly from a liquid source. The UHP helium gas can be used in semiconductor manufacturing, e.g., as a carrier gas to introduce precursors into deposition chambers during thin film deposition on the wafers.