94results about How to "Reduce total pressure drop" patented technology

The invention relates to a cooler having means for directing a cooling medium, means for directing a medium to be cooled, and an essentially axially symmetrical housing. The means for directing the medium to be cooled is arranged in such a way that the medium to be cooled, in at least one first region, flows in an essentially axial direction, and the medium to be cooled, in at least one second region, flows in a direction having a radial component. The invention also relates to a method of cooling a medium and to various uses of a cooler according to the invention.

A thermal by-pass valve for a heat exchange circuit includes a housing forming a chamber and a by-pass valve port surrounded by a valve seat. The valve port is located between first and second sections of the chamber. First and second oil ports open into the first section. At least a third port opens into the second section. A thermally sensitive actuator is mounted in the first section and has a body and a piston located at one end. The body is movable in the chamber in response to extension of the piston. A valve member is operably mounted on the body and is movable by extension of the piston. A spacer projects from and is connected to the body and forms a passage through which the piston extends. The spacer acts to maintain the adjacent end of the actuator body at least the length of the passage away from an end of the chamber. The spacer can have a valve portion to close a further valve port.

An n-type region encloses an n-type well region is disclosed in which is disposed a high-side drive circuit. A high resistance polysilicon thin film configuring a resistive field plate structure of a high breakdown voltage junction termination region is disposed in spiral form on the n-type region. An OUT electrode, a ground electrode, and a Vcc1 electrode are disposed on the n-type region. The Vcc1 electrode is connected to the positive electrode of an auxiliary direct current power supply (a bootstrap capacitor). The OUT electrode is connected to the negative electrode of the auxiliary direct current power supply. One end portion (a second contact portion) of the high resistance polysilicon thin film is connected to the ground electrode, and the other end portion (a first contact portion) of the high resistance polysilicon thin film is connected to the OUT electrode.

The present invention discloses a metal separator for a fuel cell including a reaction gas channel formed to protrude from a first face of the metal separator to a second face thereof, a coolant channel formed between the reaction gas channels protruding from the second face of the metal separator, a reaction gas manifold opened to introduce a reaction gas into the metal separator, a coolant manifold opened to introduce a coolant into the metal separator, and a stepped portion positioned at any one of the space between the reaction gas channel and the reaction gas manifold, and the reaction gas channel. This configuration serves to widen the reaction gas flowing portion and the coolant flowing portion on the metal separator, and prevent deformation of the reaction gas flowing portion and the coolant flowing portion, thereby improving efficiency of the fuel cell.

The invention discloses a blast-furnace coal powder injection method and a system thereof. The method comprises the following steps: A, arranging coal powder stored in a coal powder bin in an injecting tank of an injecting tank group; B, pressurizing the injecting tank by using the high pressure gas obtained from a factory-supplied gas system, and injecting the coal powder into a blast furnace; and C, depressurizing the high pressure gas in the injecting tank, and then directly discharging into the coal powder bin, wherein a step C' needs to be done before the step C, and a step B' needs to be done before the step B. The step C' comprises the following steps: communicating the injecting tank with a gas container, and depressurizing the gas container by using the injecting tank. The step B' comprises the following steps: communicating the injecting tank with the gas container, and pressurizing the injecting tank by using the gas container. The invention can realize the effective recycle of the gas depressurized by the injecting tank, reduce the gas consumption of the powder making and injecting system, save the production cost, reduce the depressurized pressure difference of the depressurization system, decrease the maximum instant depressurized gas flow, reduce the impact on pipelines in the depressurization process, improve the operation stability of the system, and achieve high gas recovery rate.

The invention relates to a hydrotreating method of high-acid and high-calcium crude oil. The high-acid and high-calcium crude oil carries out hydrogenation reaction in a crude oil hydrogenation reaction area; obtained hydrogenation crude oil enters a normal-pressure tower and is fractionated to obtain normal-pressure naphtha, normal-pressure diesel and normal-pressure residue oil, wherein the normal-pressure residue oil and hydrogen gas enter a residue oil hydrogenation reaction area together to carry out the hydrogenation reaction; and reaction products are separated to obtain hydrogenationnaphtha, hydrogenation diesel and hydrogenation residue oil, wherein the hydrogenation residue oil is qualified catalytic cracking feeds. Through the method, after the high-acid and high-calcium crude oil is in hydrotreatment in the crude oil hydrogenation reaction area, acid materials and calcium in the crude oil can be efficiently removed, and therefore, corrosion of the acid materials to the normal-pressure tower can be avoided, and increase of pressure drop of a residue oil hydrogenation catalyst bed caused by calcium deposition can be avoided, and long-period safety operation of the normal-pressure tower and a residue oil hydrogenation reactor can be ensured.

The invention relates to a multi-layer structure micro-channel mixer, which comprises a base plate and a sealing plate, wherein two sample injection liquid storage chambers, two inlet channels, two groups of fluid distribution channel nets, two groups of process fluid channels, a fluid collision mixing cavity, a fluid reinforced mixing channel and an outlet buffer chamber are arranged on the baseplate in a bilateral symmetry manner and are arranged on the two sides of the fluid collision mixing cavity. Two fluids to be mixed are respectively conveyed to two sample injection liquid storage chambers, respectively enter an inlet channel through the sample injection liquid storage chambers, enter a process fluid channel after being distributed through a multi-stage fluid distribution channel,and form two opposite impinging streams after flowing out of the process fluid channel,and after mixing, vortex or secondary flow is generated under the action that the fluid collides with a bafflingbaffle or an inner component in the mixing cavity, and finally the mixed fluid mixture flows out of the mixer through the outlet buffer chamber. The multi-layer structure micro-channel mixer has theadvantages of wide operation condition range, good mixing effect, high mass transfer coefficient, small pressure drop and low energy consumption.

The invention relates to a gas dehydration and dealkylation method for a supersonic vortex tube, wherein the feed gas enters a separator and a filter separator to separate large particles out, the filtering separated feed gas and a dry gas are cooled in a first level gas-to-gas heat exchanger, and enter a first level prewhirling pre-nucleation supersonic vortex tube to be dehydrated after fine and small solid particles are separated out through a fine filter, and are separated into a first level dry gas and a gas-liquid mixture; the gas-liquid mixture enters a first level gas-liquid separatorto be separated; the separated gas phase flows into the first level dry gas to enter a second level gas-to-gas heat exchanger; the cooled first level dry gas enters a second level prewhirling pre-nucleation supersonic vortex tube to be dehydrated, and is separated into a second level dry gas and the gas-liquid mixture; the gas-liquid mixture enters a second level gas-liquid separator to be separated; the separated gas phase is interflowed with the second level dry gas to enter the second level gas-to-gas heat exchanger and the first level gas-to-gas heat exchanger for exchanging heat with thefirst level dry gas and the feed gas for temperature rise, and the heated dry gas is exported; and the high water dew point and blockage problems of hydrocarbon are solved, the dehydration and the dealkylation of the feed gas are realized, and a purification device is ensured to stably operate.

The invention discloses a descaling agent used for a hydrogenation device and the preparation method and the application thereof, and solves the coking and scale deposition of the relevant equipment during the petroleum refining process, such as a hydrogenation device reactor, a heating furnace, and a heat exchanger. The general formula of the hydrogenation descaling agent is shown as the formula (1), wherein, R is C8-C20 alkyl; R2 is H, R1 is C1-C24 alkyl, alkoxy or aryl; or both of the R1 and the R2 are C1-C15 alkyl, alkoxy or aryl. Through adopting the descaling agent of the invention, not only the coking and scale deposition can be inhibited, but also the production is simple and easy, and the descaling agent is harmless to the environment.

A multi-filter PM 10-PM 2.5 sampler which enable the simultaneous collection of four PM 10 and four PM 2.5 samples is disclosed. The sampler is provided with a PM 10 impactor to remove coarse particles and operates at 33.4 L/min. After the PM 10 impactor, the aerosol flow is divided by half by a branch pipe. Half of the flow is directed into four PM 10 cassettes, while the other half is directed into four PM 2.5 cassettes after the aerosols are further classified by a PM 2.5 impactor. To ensure the aerosol flow uniformly passes through each of the four PM 10 or four PM 2.5 cassettes, an orifice plate is assembled behind each of the filter cassettes to increase the pressure drop, such that the flow rates of eight sampling lines are nearly equal.

A heat exchanger for a vehicle engine includes a pair of tanks for supplying a coolant through a thermostat for adjusting opening/shutting depending on the temperature of the coolant and a water pump, and discharging the cooled coolant to an engine side; a header at one side coupled with the tank at one side, to which the coolant is supplied; heat exchange tubes which are structurally fastened to communicate with the heater at one end portion thereof, and arranged in parallel to a direction of driving wind; a header at the other side coupled with the tank at the other side, which is structurally fastened at the other end portion of the heat exchange tube to communicate therewith so as to discharge the coolant into the engine; and a core portion including fins fixedly brazed between the heat exchange tubes.

The present invention relates to a vehicle thermal management system which is separately provided with the final heat dissipation unit of a cooling system for cooling electronic components required for the autonomous driving of a vehicle, optimizes the modularization of units, and thereby promotes the reduction of a package.

The invention provides an array substrate and a display panel. According to the array substrate, a first power supply voltage line is formed on a second metal layer of the array substrate, a first viahole is formed in the interlayer insulating layer, a first power supply voltage line on the second metal layer is connected with a second power supply voltage line of the source-drain electrode layerthrough a first via hole, at least two connections exist between the first power supply voltage line and the second power supply voltage line, parallel connection of the first power supply voltage line and the second power supply voltage line is ensured, therefore, the impedance of the power supply voltage line is reduced, the problem of voltage drop on the power supply voltage line is relieved,a film layer does not need to be added, the thickness of the display panel is not influenced, and the technical problem of uneven brightness of the display panel due to the voltage drop on the power supply voltage signal line of an existing display panel is relieved.

The invention discloses a heat pump type air-conditioning heat exchanger with a heat exchange working medium flow direction and a flow path number in synchronous change. The heat pump type air-conditioning heat exchanger comprises a heat exchanger with 2n flow paths, first and second branch pipes at a leeward side, first and second branch pipes at a windward side, a header pipe at the leeward side and a header pipe at the windward side, wherein the header pipe at the leeward side is separately connected with the first branch pipe and the second branch pipe at the leeward side; the header pipe at the windward side is separately connected with the first branch pipe and the second branch pipe at the windward side; the branch pipes at the leeward side and the branch pipes the windward side are correspondingly arranged, and are separately connected with end openings at the leeward side and the windward side of the n flow paths in the heat exchanger; the second branch pipe at the leeward side and the first branch pipe at the windward side are provided with one-way valves; the inlet end of the one-way valve of the second branch pipe at the leeward side and the outlet end of the one-way valve of the first branch pipe at the windward side are connected through a pipeline to form a refrigerating branch pipe; and the refrigerating branch pipe is provided with an electronic valve. The number of the flow paths of the heat exchanger is changed with the switching of a refrigerating working condition and a heating working condition while the flow direction of the heat exchange working medium is changed with the switching of the working condition, so that the performances of an air conditioner are optimal.

The invention provides an oil cooling system. The oil cooling system comprises a cooling liquid circulating loop of an engine and an oil circulating loop of a hydraulic execution mechanism and further comprises an oil cooler, and heat exchange is carried out on cooling liquid in the cooling liquid circulating loop of the engine and oil in the oil circulating loop of the hydraulic execution mechanism in the oil cooler. The oil cooling system is simple in structure, and pressure is reduced.

The invention discloses a catalyst for preparing ethylene glycol through dimethyl oxalate hydrogenation. The catalyst is of a hollow cyclic structure and comprises the following components in parts byweight: 1-50 parts of an active component, 0-10 parts of a metal aid and 30-90 parts of a carrier, wherein the active component is at least one of copper, silver, nickel, cobalt, gold and iron; the carrier is at least one of SiO2, carbon nanotubes, activated carbon, graphene, mesoporous carbon, ZrO2, Al2O3, ZnO, SBA-15, HMS, ZSM-5, MCM-41 and MCM-48. The catalyst for preparing ethylene glycol through dimethyl oxalate hydrogenation, which is disclosed by the invention, is high in activity, good in stability and high in selectivity, the conversion rate of dimethyl oxalate is greater than 99.9%,the selectivity of ethylene glycol is greater than 96%, the reaction has a small amount of byproducts, target products are easy to separate, and the catalyst is stable in reaction and free of conspicuous deactivation phenomena after long-term single tube operation of 1000 hours.