102 results about "Pressure Rate" patented technology

High temperature thermal energy storage system comprised of solid-liquid phase change material that is fully encapsulated in helically grooved, sealed, thin-wall, metal tubes. Multitude of horizontally oriented, pressure-rated steam pipes or vessels filled with PCM tube capsules form a battery of thermal storage system. The steam pipes in the battery are connected through a common liquid-side distribution header system and a common steam-side distribution header system. Multitude of steam pipes stacked up to fill a block-shaped container space. This insulated enclosure provides the basis for simple fabrication, transport and filed-erection and forms the basic building block for a modular thermal storage system.

A method and apparatus for self-calibrating control of gas flow. The gas flow rate is initially set by controlling, to a high degree of precision, the amount of opening of a flow restriction, where the design of the apparatus containing the flow restriction lends itself to achieving high precision. The gas flow rate is then measured by a pressure rate-of-drop upstream of the flow restriction, and the amount of flow restriction opening is adjusted, if need be, to obtain exactly the desired flow.

A method an apparatus for filling a vessel with compressed gas is disclosed. Gas is compressed into the vessel at a predetermined flow rate using a variable speed pump or compressor. The flow rate is adjusted to increase the gas pressure at a predetermined rate of change. The flow rate is adjusted based upon the instantaneous value of a measured parameter such as gas temperature or pressure or ambient temperature. The parameter is measured by a transducer and the value is fed back to a controller which adjusts the speed of the compressor or pump to produce the flow rate needed to achieve the predetermined pressure rate of change.

A gas flow rate verification apparatus is provided for shared use in a multiple tool semiconductor processing platform. The gas flow rate verification apparatus is defined to measure a pressure rate of rise and temperature within a test volume for determination of a corresponding gas flow rate. The apparatus includes first and second volumes, wherein the second volume is larger than the first volume. The apparatus also includes first and second pressure measurement devices, wherein the second pressure measurement device is capable of measuring higher pressures. Based on the target gas flow rate to be measured, either the first or second volume can be selected as the test volume, and either the first or second pressure measurement device can be selected to measure the pressure in the test volume. Configurability of the apparatus enables accurate measurement of gas flow rates over a broad range and in an time efficient manner.

The disclosure is drawn to methods of drilling wells utilizing blow out prevention components of differing pressure ratings. In the initial drilling phase, a lower pressure rated blow out prevention component is used. In a subsequent drilling phase where a reservoir of a natural resource is penetrated, a higher pressure rated blow out prevention component is used.

A cabin pressure control system and method improves cabin pressurization during aircraft take-off operations. The cabin pressure control system sets a cabin pressurization rate limit based on a cabin pressurization rate error. The cabin pressurization rate error is derived from a comparison of a sensed cabin pressure rate-of-change value and a predetermined cabin pressurization rate value.

A high pressure fluid system including enhanced safety, maintenance and servicing features. The system can include a CAM assembly module, having a valve seat assembly, seal cartridge assembly and inlet manifold, that is easily installed in and removed from a frame and/discharge manifold as a single unit. A discharge manifold can isolate different pressure rated passageways of the system, and multiple rupture discs associated with the same. A discharge manifold end plate can be included to provide ease of repair of discharge outlets and to establish a plumbing system for the rupture discs. A quick coupler can facilitate connection between a plunger of the seal cartridge assembly and a cross head stub connected to a power frame. A lubrication valve assembly can provide and meter lubrication from a high pressure inlet source to a plunger and packing of the seal cartridge assembly.

Provided is a grinding method of the surface of a high-grade stainless steel frosted plate. The steps of grinding method include that, (1) throwing pills, firstly, after a steel plate is annealed, cooled and scale broken, the steel plate is taken into a pill throwing machine, new steel pills are stopped from being added at the time of five hours earlier of the steel plate being taken into the pill throwing machine, then, when narrow materials throws pills, throwing head speed is 1850-2000 revolutions per minute, and when broad materials throws pills, throwing head speed is 1600-1700 revolutions per minute, (2) rolling overall pressure rate of a cold rolling being equals to or over 65%, (3) starting a first upper grinding head, a second upper grinding head and a third grinding head in the grinding time, firstly, the grain size of a abrasive band is polished, the new abrasive band is firstly ground to be attenuated on other steel coils, an abrasive band of the attenuation equal to or over 100 minutes and an abrasive band of the attenuation equals to or over 200 minutes, secondly, the abrasive band of the attenuation which equals to or over 100 minutes is mounted on the first upper grinding head, and then two abrasive bands of the attenuation equal to or over 200 minutes are installed on the second upper grinding head and the third grinding head to be precisely ground. The grinding method improves the surface quality of the frosted plate of the cold rolling and reduces the surface defects of the steel plate.

A fluid injector made of pressure rated components that attach to a fluid flow line so that flow is transferred from the flow line, into the injection unit and back to the fluid flow line. The inlet flow is used to pressurize the storage tank and provide a solution to mix with injection solutions in the tank to provide an accurate preset or adjustable injection rate into the fluid flow line. Vent/proportioner ports provide back flow protection, prevent fluid from siphoning from the storage tank, provide an internal air release port and set injection ratios. A mixing control valve adjusts the injection ratios by mixing outgoing injection solutions with incoming fluid from the fluid flow line. Flexible bladders isolate one or more injection solutions within one storage container which are injected simultaneously at independent injection rates.

The application discloses a test system and a test method for a pressure protection system of a spacecraft sealed cabin. The test system comprises a first space environment simulation device, a secondspace environment simulation device, a simulation cabin body, an emergency pressure protection system, an air inlet pipeline assembly and a pressure relief pipeline assembly, wherein the pressure relief pipeline assembly comprises a pressure relief pipeline, a second program-controlled opening valve is arranged on the pressure relief pipeline, the air inlet pipeline assembly comprises an air inlet pipeline, and the air inlet pipeline is provided with a first program-controlled opening valve; wherein the second program-controlled opening valve controls the pressure relief rate of the pressurerelief pipeline to the second space environment simulation equipment to realize the simulation of different leakage holes of different spacecrafts in orbit, and the first program-controlled opening valve controls the re-pressure rate of the air inlet pipeline to the simulation cabin body for calibrating the equivalent diameters of the leakage holes. According to the test system and the test method, the working process of the pressure protection system in the cabin is simulated when the spacecraft loses pressure in orbit, and the performance of the pressure protection system is evaluated to provide support for the safety of future manned spacecraft.

The invention relates to the field of control of a gas dispenser and particularly relates to a self-feedback control method of a gas dispenser. The self-feedback control method comprises the following steps of: initializing a system and calculating an instantaneous pressure changing rate; when the instantaneous pressure changing rate is greater than a pre-set value, maintaining the gas leakage of the inner part of a pipeline of the gas dispenser; if the inner part of the pipeline of the gas dispenser does not leak gas, setting a gas dispensing amount or a gas dispensing volume and a charging pressure rated value; sampling a flow of a mass flow meter and a pressure value of a pressure-limited sensing device in real time; calculating a predicated charging pressure value of a terminal by an electric controller through using a predicated charging pressure algorithm; comparing the predicated charging pressure value with a pre-set charging pressure rated value; if the predicated charging pressure value is equal to the pre-set charging pressure rated value, finishing the gas dispensing; reading a pressure value of the terminal by the pressure-limited sensing device when the gas dispensing is finished and comparing the pressure value with the pre-set charging pressure rated value; and revising a weighted value of an output layer of the predicated charging pressure algorithm according to the error of the values and the flow when the gas dispensing is stopped. According to the self-feedback control method disclosed by the invention, the adaptive capacity of the gas dispenser to a pipeline environment is improved and the self-feedback control of the gas dispenser is realized.