3436 results about "Working fluid" patented technology

Embodiments of systems and methods for converting thermal energy to electrical power are disclosed. In embodiments, a system for converting thermal energy to electrical power may include a thermal cycle device. The thermal cycle device may include an evaporator including a first fluid path for a flow of heated fluid and a second fluid path for a flow of a working fluid and configured to indirectly transfer heat from the flow of heated fluid to the flow of working fluid, a condenser to cool the working fluid, a pump to transport working fluid from the condenser, an expander to generate electrical power via the working fluid, and a loop for the flow of the working fluid. The system may include an amount of heat carrier injected into the loop and configured to adsorb and desorb the working fluid and generate additional heat to increase output of electrical power.

The invention provides a method and a system for utilizing high-pressure water as a high-temperature compressed air energy storage heat exchange working medium, the system comprises an air compression unit and an air turbine, the pressure of nitrogen output by a nitrogen conveying unit is any saturated vapor pressure which is 10 DEG C lower than the outlet temperature of the air compression unit and corresponds to water vapor in the outlet temperature range of the air compression unit; the energy storage and release unit comprises a first heat exchanger, a shell pass inlet is connected with an air compression unit through a pipeline, a shell pass outlet is connected with an air storage device through a pipeline, a tube pass inlet is connected with a low-temperature water storage tank through a pipeline, and a tube pass outlet is connected with a high-temperature water storage tank through a pipeline; the low-temperature water storage tank is connected with the nitrogen conveying unit through a pipeline, a tube pass inlet of the second heat exchanger is connected with the high-temperature water storage tank through a pipeline, a tube pass outlet is connected with the low-temperature water storage tank through a pipeline, a shell pass inlet is connected with the gas storage device through a pipeline, and a shell pass outlet is connected with the air turbine through a pipeline. The system complexity is reduced, and the investment of heat storage and exchange working media is also reduced.

The invention discloses a coal-fired power generation steam and heat pump integrated energy storage system and an operation method thereof. The system comprises a coal-fired unit coupling fused salt energy release system and a reheat steam coupling heat pump energy storage system. In the low ebb of electricity utilization, the coal-fired unit outputs electric energy to drive the heat pump charging compressor to compress a heat pump working medium, then the heat pump working medium heats the fused salt, meanwhile, part of reheat steam of the coal-fired unit sequentially heats the fused salt and a working medium at an outlet of the heat pump charging expansion machine, and the load is further reduced; and finally, redundant electric energy and part of heat energy of the reheated steam are converted into fused salt heat energy to be stored. In the peak period of electricity utilization, a part of exhaust steam of the high-pressure cylinder is heated through heat stored in the fused salt storage tank to generate reheated steam, the heat absorption capacity of main steam entering the boiler is increased under the condition that the coal consumption of the boiler is not changed, the flow of the main steam is also increased, and then the output load of the coal-fired unit is increased. According to the method, the peak regulation potential of the coal-fired unit can be exerted, the output load interval of the unit is expanded, and the method is effective for improving the peak regulation capacity of the coal-fired unit and stabilizing power grid fluctuation.

An electric compressor and a heat exchanger module including the same. The heat exchanger module includes heat exchanger components, a manifold, a bracket mounting the heat exchanger components and the manifold, and an electric compressor. Further, the heat exchanger module may perform cooling through heat exchange by separating an inverter module coupled to a compressor and attaching the separated inverter module to a chiller in which a working fluid at a low temperature flows.

An immersion cooling system includes a work tank, a device to be cooled, and a heat conduction device. The work tank has a vapor section and a liquid-phase section. The liquid-phase section is adapted to contain a liquid-phase working fluid. At least one portion of the device to be cooled is in the vapor section. The heat conduction device includes a heat conduction element and a boiling-assisting structure. The heat conduction element has a first section and a second section. The first section is in the liquid-phase section, and the second section is connected to the at least one portion of the device to be cooled. The boiling-assisting structure is on the first section.

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.

A heat pipe includes an extruded profile body, with a hollow body closed at the ends, filled with a predefined volume of diphasic working fluid. A plurality of longitudinal channels are included, with each having a section delimited by a bottom formed by one tubular peripheral wall of the profiled body, and laterally by two longitudinal dividers. A circumferential transfer channel, which is arranged transversely to the local axial direction and provides mutual fluid connection between the longitudinal channels, is provided at a position along the longitudinal path and or at an end, where the longitudinal dividers are interrupted, partially or completely, in the area of the circumferential channel, with optional use of a closure ring.

A thermal battery energy storage system coupled with a coal-fired generator set and its operation method, including a coal-fired generator set system and a heat pump energy storage system coupled with molten salt heat storage; the coal-fired generator set system includes a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a generator, a condenser, a condensate pump, a low-pressure heater, a deaerator, a feedwater pump, a high-pressure heater, and a boiler; the invention uses the exhaust steam of the low-pressure cylinder as a heat source to preheat the circulating working fluid in the thermal battery heat pump system, so that the total efficiency and COP of the system are increased, and the exhaust steam recovery and utilization capacity is enhanced. At the same time, the output load of the coal-fired unit is reduced, the peak-shaving range of the unit is expanded, and the peak-shaving depth is increased.

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.

In an embodiment, a cryoablation shaft is included having a working fluid circuit; a vacuum circuit; an insulated portion, wherein the vacuum circuit runs through the insulated portion; and an expansion chamber; a supply tube having a distal outlet in the expansion chamber, wherein fluid from the working fluid circuit travels distally down the cryoablation shaft through supply tube and expands in the expansion chamber; and a guidewire lumen including a metallic tube and a polymer sleeve configured to surround at least a portion of the metallic tube.

The invention discloses an active thermal protection system for a high-speed aircraft and a using method of the active thermal protection system. The system comprises a liquid storage tank, an active thermal protection plate, a gas high-pressure storage tank and a thrust engine. The liquid storage tank, the active thermal protection plate and the gas high-pressure storage tank are connected in sequence to form a loop; a first electromagnetic valve and a fourth electromagnetic valve are respectively arranged on a connecting pipeline between the liquid storage tank and the active thermal protection plate and a connecting pipeline between the gas high-pressure storage tank and the liquid storage tank; the gas high-pressure storage tank is further provided with two gas paths, one gas path is connected with the thrust engine through a third electromagnetic valve, and the other gas path is communicated with the outside through a second electromagnetic valve. The liquid storage tank is used for storing a liquid heat-absorbing working medium; and the active thermal protection plate is filled with a catalyst. The active thermal protection system is high in heat absorption capacity, high-temperature and high-pressure gas can be generated through aerodynamic heat to do work, waste heat utilization is achieved, the thickness of a thermal insulation layer of the aircraft is reduced, the effective load of the system is increased, and the maneuverability of the aircraft is effectively improved.

The invention relates to the technical field of heat exchange equipment, and provides a non-closed phase-change immersion cooling system which comprises a non-closed cooling box, an ejector and a heat exchanger, a phase-change cooling working medium is arranged in the cooling box, and supercooled liquid on the outer side of a gas collecting hood enters the ejector through a cooling liquid outlet via a working medium pump to form primary flow; when the cooling heat source device generates heat, the phase change cooling working medium on the inner side of the gas-collecting hood is locally boiled and forms secondary flow of the ejector through a gas-collecting hood outlet in the gas-collecting hood, the primary flow and the secondary flow are mixed to become a series of tiny bubbles which are ejected together with the phase change cooling working medium, and the tiny bubbles inside are condensed to become supercooled liquid through supercooling of the heat exchanger. And cooling the computer mainboard and the power battery in the cooling box. According to the phase change immersion cooling system, efficient cooling is guaranteed, meanwhile, the operation process is simplified, the safety and maintainability of the system are improved, and an innovative and practical solution is provided for cooling of a data center and a battery.

A variable-part liquid cooling pumping unit, including a water block set, flow guiding plate, and water block cover of a water block unit, and a chamber body of a pump housing assembly of a pump unit is provided. The chamber body includes an impeller cavity inlet, flow adjusting disc, impeller cavity, and impeller cavity outlet opening. Inlet and outlet ports are positioned on a same side. More than one water block unit and pump unit are provided and interchangeable. During operation, working fluid is sucked via the inlet port through the impeller cavity inlet, pass the flow adjusting disc, into the impeller cavity, to a plurality of curved blades of an impeller of a rotor assembly unit. From there, the working fluid travels through the impeller cavity outlet opening, flow guiding plate, and water block set, before exiting through the flow guiding plate, and outlet port.

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.

The invention provides a device and a method for polishing and repairing a blisk of an aero-engine by using composite laser aiming at the common problems of cracks and surface roughness in the machining process of the blisk of the aero-engine, and the device comprises a five-axis moving platform system, a 1064nm infrared laser generator system and an optical ranging system; according to the method, a six-axis composite laser polishing and repairing device is utilized, a high-precision multi-wavelength and multi-frequency-band laser scanning device is carried, continuous polishing and repairing serve as a main body, and a five-axis moving platform system, a 1064nm infrared laser generator system, an optical distance measuring device and an ultrasonic scanning and surface analysis technology are combined. Honeycomb-shaped cracks left on the surface of the blade of the blade disc through milling are successfully repaired, and the surface quality of the blade disc is remarkably improved. According to the device and method, the repairing effect is excellent, the polishing efficiency is remarkably improved, and the time needed by traditional manual polishing can be greatly shortened. In addition, the surface roughness of the bladed disc repaired through the composite laser polishing repairing method is remarkably reduced, and the influence on the flowing property of working fluid is effectively controlled. Therefore, the method has important engineering application prospects and is expected to bring remarkable method progress and economic benefits in the field of aero-engine manufacturing.

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.

Disclosed herein is a shock absorber. The shock absorber is provided to include a damping tube provided in a compression chamber and formed in a hollow shape to have a damping chamber therein, a damping piston provided to slidably move along an inner side of the damping tube and configured to pressurize a working fluid accommodated in the damping chamber, an extension rod configured to connect the damping piston and a piston rod, and at least one damping hole formed through the damping tube to allow the damping chamber and the compression chamber to communicate with each other.

The invention provides two-phase cold plate equipment, a server heat dissipation system, a control method, control equipment, a computer readable storage medium and a program product, and relates to the technical field of server liquid cooling heat dissipation. The cold plate is filled with a first liquid-state phase change working medium and is provided with a cold plate liquid return opening in the bottom end face and a cold plate air outlet in the top; the waste heat recovery condensation chamber is filled with a second liquid phase change working medium, and a gas source gas outlet is formed in the top of the waste heat recovery condensation chamber; the first end of the circulation pipeline is connected with the cold plate air outlet, and the second end penetrates through the waste heat recovery condensation cavity to be connected with the cold plate liquid return opening; and the pneumatic pump is arranged on the circulating pipeline between the waste heat recovery condensation chamber and the cold plate liquid return opening and is connected with the air source air outlet. Waste heat of the cold plate can be recycled, liquid phase change working media flow back into the cold plate through the waste heat, a flow field in the cold plate is disturbed, separation of bubbles on the bottom end face of the cold plate is accelerated, and the heat dissipation efficiency of a server is improved.

A work machine includes: a hydraulic actuator; a closed-circuit pump that is connected to the hydraulic actuator in a closed circuit, and supplies and discharges a hydraulic working fluid to and from the hydraulic actuator; an open-circuit pump that is connected to the hydraulic actuator in an open circuit, and supplies the hydraulic working fluid to the hydraulic actuator; a charge pump; a charge flow path that introduces the hydraulic working fluid delivered from the charge pump to the closed circuit; an excess fluid discharging device that discharges an excess hydraulic working fluid of the closed circuit to the charge flow path; and a controller that controls a delivery capacity of the closed-circuit pump and a delivery capacity of the open-circuit pump. The controller increases the delivery capacity of the open-circuit pump, or reduces the delivery capacity of the closed-circuit pump when a state of a pressure of the charge flow path has transited to be lower than a predetermined pressure threshold from equal to or higher than the predetermined pressure threshold, or when a state of the work device has transited to a state of performing the excavation work from a state of not-performing the excavation work.

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.

A system including: (i) a pumped-heat energy storage system (“PHES system”), wherein the PHES system is operable in a charge mode to convert electricity into stored thermal energy in a hot thermal storage (“HTS”) medium; (ii) an electric heater in thermal contact with the hot HTS medium, wherein the electric heater is operable to heat the hot HTS medium above a temperature achievable by transferring heat from a working fluid to a warm HTS medium in a thermodynamic cycle.

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.

A turbo machine with a shaft, an impeller arranged on said shaft, and one or more guide vanes configured to guide operating fluid to or from said impeller, wherein the one or at least one of the more guide vanes is movably arranged in the turbo machine and arranged in relation to one or more components of said turbo machine such that said one or at least one of the more guide vanes abuts said one or more components and that said one or at least one of the more guide vanes is movable relative to said one or more components, wherein at least one contact surface between said one or at least one of the more guide vanes and said one or more components comprises a diamond like carbon coating. The invention also relates to a method of manufacturing such turbo machine.

A heat transfer apparatus including a housing and a wick structure is provided that is configured to dissipate heat from a heat source. The housing defines a chamber that holds working fluid. The wick structure includes a body and pores defined by the body. The heat transfer apparatus defines an evaporator section configured to evaporate the working fluid using heat from a heat source and a condenser section configured to dissipate heat carried by the evaporated working fluid through condensation of the evaporated working fluid. The wick structure has a repeatable, configurable, and controlled geometry optimized to move the working fluid from the condenser section to the evaporator section via capillary action. The body of the wick structure may have a gyroidal geometry. Associated methods are also provided.

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.