2404 results about "Working fluid" patented technology

A combination heat dissipation structure includes a vapor chamber and at least one heat pipe. The vapor chamber defines an airtight chamber filled with a working fluid and provided with first and second wick structures. The vapor chamber further includes at least one through hole formed on its upper wall and communicable with the airtight chamber, and at least one annular element provided in the airtight chamber corresponding to the through hole to contact with the first and second wick structures. The heat pipe has an open end inserted into the airtight chamber to contact with the first wick structure, such that the heat pipe is axially supported and located by the annular element. With these arrangements, a flow-back path between the vapor chamber and the heat pipe is largely shortened to avoid dry burning in the vapor chamber and upgrade the two-phase heat exchange efficiency of the vapor chamber.

The invention provides a thermal behavior experiment system and method under a narrow rectangular channel reflooding cooling condition. The system comprises a heating water storage tank, a nitrogen tank, a steam tank, a shield pump, a preheating section, a first direct-current power supply, a second direct-current power supply, a narrow rectangular channel test section, a steam-water separator, a surge tank, a flow control valve, a silencer and an electromagnetic valve. The experimental working medium is deionized water, and re-submerging cooling experiments under different system pressures, working medium supercooling degrees, heating wall surface heat flux densities, working medium submerging speeds, heating wall surface initial temperatures and channel interior initial liquid levels can be carried out on an experimental section of a narrow rectangular channel structure. The device is suitable for narrow rectangular channel structures with different sizes, and can be used for carrying out re-submerging experiments on experiment sections with single-plate double-channel, double-plate three-channel and more channels. The system pressure and the inlet flow in the submerging process can be kept stable, and it can be ensured that the supercooling degree of a working medium, the heating wall surface temperature and the initial liquid level are controllable.

The invention discloses a control method and device for a supercritical carbon dioxide recompression cycle power generation system, and the method comprises the steps: predicting the load change of the supercritical carbon dioxide Brayton cycle power generation system according to the historical operation data and current operation state of the supercritical carbon dioxide Brayton cycle power generation system; predicting the surge risk of the compressor according to the load change of the supercritical carbon dioxide Brayton cycle power generation system; according to the load change of the supercritical carbon dioxide Brayton cycle power generation system, the split ratio is adjusted, so that the recompression Brayton cycle power generation system operates at the optimal efficiency; and the flow, pressure and temperature of a compressor working medium in the supercritical carbon dioxide Brayton cycle power generation system are adjusted according to the surge risk, so that the compressor works in a non-surge area. When the supercritical carbon dioxide Brayton cycle power generation system approaches the surge boundary, the system adjusts the opening degree of the bypass valve in advance for flow release, so that active closed-loop control of surge prediction-response-relief is achieved, a compressor is effectively prevented from entering an unstable area under sudden load change, start and stop or extreme disturbance, and the service life of the compressor is prolonged. And the safety stability and the operation continuity of the system are obviously improved.

Heat exchangers for cryogenic fuel distribution systems and related methods are disclosed herein. An example aircraft disclosed herein includes a cryogenic fuel system including a cryogenic fuel, a hydraulic system including a hydraulic fluid, a gas turbine engine fluidly coupled to the cryogenic fuel system, and a heat exchanger fluidly coupled to the cryogenic fuel system, the heat exchanger is used to exchange heat between the cryogenic fuel and at least one of (1) hydraulic fluid or (2) working fluid thermally coupled to the hydraulic system.

A cooling system includes a liquid loop, a vapor compression loop, and a heat exchanger in fluid communication with each of the liquid loop and the vapor compression cycle loop. The liquid loop includes a cold sink for cooling a heat load. The vapor compression cycle loop is fluidly coupled to the liquid loop by a separator, which is configured to separate a two-phase form of a working fluid received from the cold sink into a vapor form of the working fluid and a liquid form of the working fluid.

A combination thermal module includes a vapor chamber defining an airtight chamber filled with a working fluid and having at least one through hole formed thereon communicable with the airtight chamber; at least one annular wick structure provided in the airtight chamber corresponding to the through hole; and at least one heat pipe has an open end inserted into the airtight chamber to contact with a first wick structure on an inner lower surface of the vapor chamber and be axially supported on the annular wick structure. The annular wick structure includes communicable axial and radial passages, allowing vaporized working fluid to flow from the vapor chamber to the heat pipe quickly. With these arrangements, the thermal module has a shortened flow-back path between the vapor chamber and the heat pipe to avoid dry burning in the vapor chamber and upgrade the two-phase heat exchange efficiency of the vapor chamber.

Thermal management systems include a vapor cycle and a liquid cycle sharing a common working fluid. The vapor cycle includes, along a vapor cycle flow path, a compressor and a condenser. The liquid cycle includes, along a liquid cycle flow path, a fluid driver, a load, a regulator valve, and a phase change material heat exchanger. A cold sink is thermally coupled to a heat load. A separator is configured to separate liquid and vapor portions of the working fluid and direct the liquid into the liquid cycle and the vapor into the vapor cycle. The separator is part of both the vapor cycle and the liquid cycle. The regulator valve controls a temperature of the working fluid within the liquid cycle at a location upstream of the phase change material heat exchanger to control a mode of operation of the phase change material heat exchanger.

The invention provides an intelligent harmonic dynamic compensation method and system for a data center. Wherein the dynamic coupling model is established through multi-dimensional data fusion. The method comprises the following steps: firstly, collecting equipment vibration, noise and electric energy quality data, and constructing a coupling model containing a vibration mode characteristic, a noise characteristic and harmonic distortion rate mapping relation; the heating and ventilation equipment operation condition is analyzed based on the model, and energy distribution caused by working medium flow and a motor is quantified into a working condition coefficient to be fed back to the model through frequency spectrum energy calculation. The nonlinear characteristic that electric energy harmonic changes along with loads is combined, the rotating speed range of the device is dynamically matched through frequency converter data, and the rotating speed difference of the device is mapped to a harmonic offset component generated by the frequency conversion device. And finally, generating an equipment parameter adjustment value matched with the current working condition, and realizing dynamic adaptation of harmonic compensation. According to the technical scheme provided by the invention, collaborative optimization of data center harmonic compensation and equipment operation conditions is realized.

A flow direction control device of heating stream and cooling stream is prepared as connecting said device separately to the first heat exchange unit, the second heat exchange unit, air conditioner and compressor for controlling heated working fluid from the first heat exchange unit to be sent to air conditioner for being used as the first heat media or to be sent to the second heat exchanger for being condensed there then to send it to air conditioner for being used as the second cooling media in order to make air conditioner output hot and cold alternatively, enabling to set heating course on the first heat exchange unit for providing the third heat media out.

The invention discloses an immersed liquid cooling device, which includes a liquid cooling radiator with a first liquid box at one end thereof combined with the open end of a liquid storage box, so that a heat dissipation radiator pipe set at the other end is immersed in the cooling fluid in the liquid storage box. The liquid storage box is externally equipped with a cooling chip and a heat sink. When the cooling chip is energized, the cooling chip will reduce the cooling fluid in the liquid storage box to a freezing temperature, so that the cooling fluid can quickly cool down the working fluid in the heat dissipation radiator pipe set, thereby preventing the heat dissipation radiator pipe set from being affected by the ambient temperature in its heat dissipation efficiency.

Connection adapter for docking and undocking a maintenance station to a service valve of a third-party system in which a working fluid circulates in a closed circuit with a connection via which for filling working fluid under pressure can be fed from the maintenance station into the connection adapter or via which working fluid under pressure can be discharged, with a dead space which is ventilated via a venting path, the connection adapter includes a servo space in which a servo piston for opening and closing the venting path is accommodated, and a valve spindle that operates a valve element, and a hold-down device for opening a spring valve insert forming the service valve, which is designed and arranged in such a way that it only opens the spring valve insert after the servo piston has reached a position closing the ventilation path.

This application provides a heat dissipation apparatus, including an evaporator and a condenser. The evaporator includes a housing and a division plate. The housing has a sealed inner cavity. The division plate divides the inner cavity into a first sub-cavity and a second sub-cavity. A first pipeline communicates with the first sub-cavity. A second pipeline communicates with the second sub-cavity. A heat emitting element is further fastened in the first sub-cavity. The division plate is provided with a flow guiding hole communicating with the first sub-cavity and the second sub-cavity. The flow guiding hole is provided facing the heat emitting element. A cooling working fluid in the condenser is transmitted to the second sub-cavity through the second pipeline. The cooling working fluid flows into the first sub-cavity through the flow guiding hole, and flows back to the condenser through the first pipeline for cooling.

There is provided a fluid circuit capable of continuously driving pressure-increasing devices with a simple configuration. A plurality of pressure-increasing devices are connected in parallel to a fluid supply device that delivers a working fluid. A stroke direction of the piston of each of the pressure-increasing device is switched by the working fluid. A phase of the piston of one pressure-increasing device is different from a phase of the piston of the other pressure-increasing device.

A system for generating steam for industrial heat. The system may include a plurality of heat pump cycles in thermal communication with each other and in thermal communication with a steam generation cycle. The plurality of heat pump cycles may include first and second heat pump cycles. The first heat pump circulates a first a working fluid and includes a first heat exchanger. The second heat pump cycle circulates a second working fluid and includes a second heat exchanger. The first heat exchanger transfers heat from the first to the second working fluid. The second heat exchanger transfers heat to a third working fluid in the steam generation cycle.

The invention provides a self-resetting liquid inerter shock insulation support. The self-resetting liquid inerter shock insulation support comprises a top plate, a middle plate, a bottom plate, a supporting ring, a flexible shock insulation body, an inerter, a resetting rod and an elastic resetting piece, the reset rod penetrates through the inerter and the middle plate, the upper end of the reset rod is connected with the top plate through an elastic reset piece, the bottom plate is provided with an arc-shaped groove, and the lower end of the reset rod is in contact fit with the arc-shaped groove; the inerter comprises a cylinder body, a spiral pipe and a piston, a sealing cavity is formed in the cylinder body, the sealing cavity is filled with working fluid, the piston divides the sealing cavity into an upper cavity and a lower cavity, the reset rod penetrates through the piston and is connected with the piston, an upper port of the spiral pipe sleeve is communicated with the upper cavity, and a lower port of the spiral pipe sleeve is communicated with the lower cavity. The inerter is implanted into the flexible shock insulation body, high static degree and low dynamic rigidity can be achieved, the shock absorption frequency band is effectively expanded, the shock insulation effect is improved, the liquid inerter can increase certain inertia mass and damping energy consumption effects for the shock insulation support, and the liquid inerter shock insulation support is simple in structure, high in durability and low in cost.

The invention discloses an efficient thermal recovery packer, and relates to the technical field of oil field downhole tools. The upper cooler and the lower cooler are both of a heat pipe structure, the upper cooler and the lower cooler are both of a closed cavity structure, capillary objects are bonded to the inner wall of a cavity, the cavity is filled with working fluid, and air pressure in the cavity is in a negative pressure state. The device has the beneficial effects that the outer circle of the lower cooling disc expands when the lower cooling disc is heated, the outer circle of the lower cooling disc is elastically attached to the inner wall of the sleeve, steam can be directly blocked on the lower side of the rubber barrel, meanwhile, the lower cooling disc makes direct contact with the sleeve and can exchange heat with the sleeve below the rubber barrel, and the temperature of the sleeve making contact with the rubber barrel is reduced; the temperature of the rubber sleeve is further reduced, the sealing performance of the rubber sleeve is improved, the service life of the rubber sleeve is prolonged, an annular groove in the outer circle of the lower cooling disc enables an annular space to be formed between the lower cooling disc and the sleeve, and heat insulation and elastic connection are facilitated.

The invention belongs to the technical field of refrigeration and heat dissipation of phase change materials, and particularly relates to a heat pipe heat dissipation device and an outdoor unit. The heat dissipation device comprises a first evaporation part, a condensation part, a gas collecting pipe and a liquid collecting pipe; the gas collecting pipe and the liquid collecting pipe are distributed at the upper end and the lower end of the first evaporation part and the upper end and the lower end of the condensation part, the first evaporation part, the condensation part, the gas collecting pipe and the liquid collecting pipe jointly form a closed circulation channel, natural circulation of evaporation, transmission, condensation and backflow of a working medium is completed through the thermosyphon effect, and therefore heat dissipation of a heating element is achieved. Through structural optimization of the heat pipe heat dissipation device, the self-circulation characteristic of a working medium in the evaporation, condensation and backflow processes is fully utilized, and the heat pipe heat dissipation device has the advantages of being free of external power, high in heat dissipation efficiency, compact in structure, high in reliability and the like and is suitable for application scenes such as outdoor units with limited space and high heat dissipation requirements.

The invention discloses a coupled thermal power cycle system, which relates to the technical field of energy application, and effectively realizes coupling of an organic Rankine cycle module and a Brayton cycle module in fusion reactor heat source application by inputting an expanded first working medium and a deoxygenated second working medium into a heat exchanger module for heat exchange. On one hand, the temperature of the first working medium can be reduced through heat transfer to reduce the cooling cost of the first working medium, and on the other hand, heat in the Brayton cycle module can be utilized to reduce generation of waste heat. In addition, the organic Rankine cycle module has a reheating stage, and the energy conversion efficiency of the coupled thermal power cycle system can be effectively improved. In addition, the parameters of the coupled thermal power circulation system are set based on the enthalpy value, and the system heat efficiency can be further improved.

A combination heat dissipation structure includes a vapor chamber and at least one heat pipe. The vapor chamber defines an airtight chamber filled with a working fluid and provided with first and second wick structures. The vapor chamber further includes at least one through hole formed on its upper wall and communicable with the airtight chamber, and annular elements provided in the airtight chamber corresponding to the through hole to contact with the first and second wick structures. The heat pipe has an open end inserted into the airtight chamber to contact with the first wick structure, such that the heat pipe is axially supported and located by the annular elements. With these arrangements, a flow-back path between the vapor chamber and the heat pipe is largely shortened to avoid dry burning in the vapor chamber and upgrade the two-phase heat exchange efficiency of the vapor chamber.

A hydraulic drive apparatus includes a hydraulic pump that discharges a working fluid; a flow dividing valve that divides a pump passage connected to the hydraulic pump into first and second passages, and changes an opening degree of each passage according to a signal that is input to the flow dividing valve; a travel system hydraulic circuit that is connected to the first passage and controls a flow of the working fluid to a travel motor; a loading system hydraulic circuit that is connected to the second passage and controls a flow of the working fluid to a loading actuator; a pressure sensor that detects a pressure supplied to the travel motor; and a control device that controls, by outputting the signal to the flow dividing valve, the opening degree of the first and second passages according to the pressure detected by the pressure sensor.

The invention relates to the technical field of well cementation operation, in particular to an automatic well cementation multi-channel integrated control device which comprises a main valve body, a rotary valve element, a gland and a driving device, the main valve body is provided with a mounting cavity with an upward opening, the rotary valve element with the upper end located above the mounting cavity is arranged in the mounting cavity, and the rotary valve element is rotationally connected with the main valve body; the rotary valve element is provided with a communicating cavity with a downward opening, a gland fixedly installed together with the outer side of the upper end of the main valve body is arranged on the outer side of the upper portion of the rotary valve element, the rotary valve body is rotationally connected with the gland, and a driving device capable of driving the rotary valve element to rotate is arranged at the upper end of the rotary valve element. The quick switching valve is reasonable and compact in structure and convenient to use, through holes in different positions communicate with the communicating cavity by rotating the rotary valve element, and therefore quick switching of different working solutions is achieved; the forward blades and the reverse blades are arranged, so that two paths of cement paste are fully and uniformly mixed; and by arranging the station display device, the current working state is visually displayed, and the device has the characteristics of stability, reliability and high efficiency.

The invention discloses a parallel multi-fluid synchronous pumping micro peristaltic pump which is characterized in that a flow channel layer is provided with a plurality of fluid driving and conveying structures and flow stabilizing structures, and conveying straight flow channels are connected between an inlet liquid storage cavity and an annular driving flow channel and between an outlet liquid storage cavity and the annular driving flow channel in the fluid driving and conveying structures; the flow stabilizing structure comprises a plurality of communicated flow stabilizing cavities connected to the conveying straight flow channel between the outlet liquid storage cavity and the annular driving flow channel, the lower bottoms of the flow stabilizing cavities are in sealed connection with the base material layer, and the upper tops of the flow stabilizing cavities are in sealed connection with the thin film layer; the driving structure circularly extrudes the annular driving flow channel to generate negative pressure in the annular driving flow channel, working fluid enters from the inlet liquid storage cavity, passes through the conveying straight flow channel, the annular driving flow channel and the flow stabilizing structure, and stably outputs non-pulse working fluid from the outlet liquid storage cavity; the control module provides kinetic energy to the drive structure. According to the invention, multi-flow accurate pumping of the micro peristaltic pump is realized.

A combined heat dissipation structure includes a vapor chamber and at least one heat pipe. The vapor chamber includes an upper plate and a lower plate. A plate chamber is defined between the upper and lower plates. A first wick structure and a working fluid are provided in the plate chamber. The upper plate has at least one through hole communicating with the plate chamber and an annular flange protruding from the through hole toward the upper plate. The annular flange has a first positioning portion. The heat pipe has two ends defined as a closed end and an open end. A second positioning portion is formed on the heat pipe close to the open end. The second positioning portion is engaged with the first positioning portion, so that the heat pipe and the vapor chamber can be combined quickly, accurately.

The embodiment of the invention discloses an ultrahigh compression ratio adjustable ejector and a variable working condition performance optimization design method thereof. The adjustable ejector comprises a nozzle, an adjusting cone, a suction chamber, a mixing chamber and a diffusion chamber, wherein working fluid is introduced into the nozzle, the adjusting cone is arranged at the throat part of the nozzle, and the fluid to be ejected is introduced into the suction chamber; the adjusting cone is formed by alternately and repeatedly connecting cylindrical surface sections and conical surface sections, and the adjusting cone can axially move; the method comprises the steps that the pressure of working fluid input into the adjustable ejector is monitored; when the pressure of the working fluid is changed between the first pressure and the second pressure, the adjusting cone is axially moved, and each cylindrical surface section directly faces the throat part in sequence, so that step type adjustment of the pressure of the working fluid is realized; when the pressure of the working fluid is changed between the second pressure and the fourth pressure, the adjusting cone is axially moved, and each conical surface section directly faces the throat part in sequence, so that the continuous adjustment of the pressure of the working fluid is realized; the mass flow of the ejected fluid in the adjustable ejector belongs to a preset range; the first pressure, the second pressure, the third pressure and the fourth pressure are gradually increased in sequence.

This shock absorber includes a cylinder in which a working fluid is sealed, a piston fitted in the cylinder to be slidable and partitioning the inside of the cylinder into two chambers, a passage through which the working fluid flows from one chamber in the cylinder due to movement of the piston, a bendable plate-shaped valve member provided in the passage and whose inner circumferential side is supported by a support member only on one surface side without being clamped from both surface sides, and a movement restriction member restricting movement of the valve member. The support member is configured such that a spring constant of a second movement range in which the valve member moves to the movement restriction member side beyond a first movement range is larger than a spring constant of the first movement range in which the valve member moves to the movement restriction member side.

A heat dissipation structure includes a vapor chamber (1), a heat pipe (2) and a working fluid. The vapor chamber (1) includes an upper shell (11), a lower shell (11) correspondingly sealed with the upper shell (11) and a first wick structure disposed on an inner surface of the upper shell (11). A chamber(S) is defined between the upper shell (11) and the lower shell (12). A penetration hole (111) communicating to the chamber(S) is defined on the upper shell (11). A second wick structure (22) includes a revealing section (221) exposed from a hollow slot (211). The working fluid is filled in the chamber(S). An inner diameter of the through hole (131) is smaller than that of the penetration hole (111). The first wick structure (13) is embedded in the hollow slot (211) and attached to the revealing section (221).

The invention relates to an energy system and a control method thereof. The energy system comprises a power generation system and an energy storage and release system, the power generation system comprises an evaporator, a turbine, a condenser and a circulating pump which are sequentially and circularly communicated to form a power generation channel, the circulating pump is used for driving a circulating working medium to circularly flow in the power generation channel, and the evaporator can vaporize the flowing circulating working medium through surface layer warm water in a water area; the turbine can drive the generator to rotate to generate electric energy under the action of the vaporized circulating working medium, and the condenser can liquefy the circulating working medium flowing through the condenser through deep cold water in a water area. The energy storage and release system comprises a gas storage device, an energy storage unit and an energy release unit, the energy storage unit and the energy release unit communicate with the gas storage device, the energy storage and release system has an energy storage mode and an energy release mode, and in the energy storage mode, the energy storage unit and the evaporator can jointly vaporize the cycle working medium; and in the energy release mode, the energy release unit and the condenser can jointly liquefy the cycle fluid. According to the energy system, the energy conversion efficiency can be effectively improved.

A combination heat dissipation structure includes a vapor chamber and at least one heat pipe. The vapor chamber defines an airtight chamber filled with a working fluid and provided with first and second wick structures. The vapor chamber further includes at least one through hole formed on its upper wall and communicable with the airtight chamber, and annular elements provided in the airtight chamber corresponding to the through hole to contact with the first and second wick structures. The heat pipe has an open end inserted into the airtight chamber to contact with the first wick structure, such that the heat pipe is axially supported and located by the annular elements. With these arrangements, a flow-back path between the vapor chamber and the heat pipe is largely shortened to avoid dry burning in the vapor chamber and upgrade the two-phase heat exchange efficiency of the vapor chamber.

The invention discloses a loop heat pipe structure, and relates to the technical field of heat pipes, the loop heat pipe structure comprises an evaporator shell, and the evaporator shell communicates with a steam pipeline; the liquid storage device comprises a first liquid storage chamber and a second liquid storage chamber, and the first liquid storage chamber and the second liquid storage chamber are arranged at the two ends of the evaporator shell correspondingly; the wick is arranged in the evaporator shell; the liquid pipeline comprises a liquid phase pipe and a guide pipe which are communicated with each other, and the guide pipe sequentially penetrates through the first liquid storage chamber, the liquid absorption core and the second liquid storage chamber; wherein a first nozzle and a second nozzle are arranged on the guide pipe; the guide pipe is slidably sleeved with a sleeve, and the sleeve can slide along the guide pipe under the action of gravity and seal the first nozzle or the second nozzle. The device is not driven by external energy, the working medium is moved to the two ends of the wick by utilizing the structural design of the working medium pipeline and the sleeve, and the working medium can be in good contact with the wick under various placement conditions, so that the wick is infiltrated, and the running stability of the device is improved.

The invention provides a drilling fluid waste heat utilization system based on a drilling well site, which is arranged at a drilling well outlet and comprises a drilling fluid waste heat utilization device and a drilling fluid waste heat utilization power generation device, the drilling fluid waste heat utilization device comprises a heat dissipation circulation tank, a circulation tank group and a drilling fluid working medium pump which are connected in sequence; the drilling fluid waste heat utilization power generation device comprises a heat dissipation circulation tank, a turbine, a power generator, a condenser, a condensate reservoir and a working medium liquid pump. The heat exchange area of the drilling fluid can be increased, the contact heat exchange time with the drilling fluid can be prolonged, and the problems that due to drilling well site space limitation, cooling of the drilling fluid on the ground is insufficient, and waste heat of the drilling fluid is difficult to utilize are solved.