38 results about "Pressure cycling" patented technology

Sterilization methods and apparatus are effective to achieve a 6-log reduction in CFUs of industry standard bacteria and bacterial spores, i.e., B. stearothermophilus and B. subtilis spores, by subjecting sterilizable materials to a chemical additive-containing carbon dioxide sterilant fluid at or near its supercritical pressure and temperature conditions. Most preferably, the chemical additive-containing supercritical carbon dioxide sterilant fluid is agitated during sterilization, e.g., via mechanical agitation or via pressure cycling.

A method and apparatus for sequestering carbon dioxide (CO2) gas and releasing natural gas from underground coal and / or gas shale formations using CO2 gas captured from the flue gas of a coal burning power plant, and processing it to produce cold liquid pressurized CO2, and injecting the cold liquid CO2 under pressure to create fractures within the formation and causing the CO2 to be adsorbed into the coal or gas shale and natural gas (CH4) to be desorbed, released and recovered. A special pressure cycling process is used to enable the pressure within the formation to be increased and decreased, including allowing the liquid CO2 to change phase to a gaseous CO2, and injecting the liquid CO2 under pressure repeatedly, which causes greater expansion of the proliferation zone within the formation, and more efficiently releases CH4.

The systems and techniques of the present invention can also synergistically utilize mechanical disruption processes with the use of high hydrostatic pressure extraction, such as pressure cycling extraction techniques to achieve high yield of difficult to extract sample constituents without generating high shear stress or high temperatures.

The present invention discloses a fluid supply system suitable for vacuum and pressure circulation of fluid, the fluid supply system comprising fluid pumped from a bulk vessel tank adapted to supply a process vessel under vacuum, Where fluid is transferred from a transfer vessel to a process vessel tank at positive pressure. Also disclosed is a method of transporting fluid comprising the steps of: drawing fluid under vacuum from a bulk container; and pressurizing a transfer container to effect dispensing of the fluid into the process tank for delivery to a location of use.

The invention relates to the technical field of a high-pressure fatigue test, and particularly relates to a complete high-pressure fatigue testing device and method in which the highest testing pressure is 70MPa. According to the high-pressure fatigue testing complete device and method provided by the invention, a large-flow high-pressure piston pump is used for directly pressurizing a test piece; after the value of a pressure reaches a set test pressure value, the pressure is kept for a certain period; a double-position three-way electromagnetic valve is switched to control an air cylinder to reset; an unloading valve is automatically reset to be switched on for unloading; when the value of the pressure reaches a lower limit pressure value, the pressure is kept for the certain period, and the pressure is increased again. With the adoption of the high-pressure fatigue test device and method provided by the invention, a pressure cycling processing of pressure increasing, pressure maintaining, pressure decreasing and pressure keeping can be completed, so that the cycle of stress when a high-pressure container or pipe piece is forced in work can be simulated; the one-time cycle is performed, and the test time is added by one until a set cycle time is reached or a test container is cracked, so as to effectively test whether the fatigue service life and the limit of the test piece can meet using requirements or not. The device has the advantages of being simple in system, high in reliability, good in simulation effect and the like.