82 results about "Thermodynamic cycle" patented technology

The invention relates to the technical field of automatic control theory application and data center thermal management, and discloses a data center emergency refrigeration control method based on state space model prediction, which comprises the following steps: establishing a thermodynamic cycle state space equation; the refrigeration flow set value change rate and the water return side pressure change amount are obtained, and the dynamic heat exchange sensitivity is determined; monitoring feedback current characteristics of the driving unit, inverting cooling path resistance distribution and updating gain matrix elements; calculating a state prediction information sequence according to the temperature vector prediction deviation, and adjusting a time domain step length; the dynamic heat exchange sensitivity is introduced into prediction logic, controlled variable dynamic pressure retardation is compensated, an emergency refrigeration frequency control instruction is output, fluid fluctuation is converted into sensitivity compensation of a logic level, non-linear dynamic pressure damping of the emergency working condition is effectively impacted, the problems of control overshoot and logic instability caused by physical lag are solved, and the reliability of the system is improved. And the refrigeration response precision at the emergency conversion moment is improved.

Various examples are provided related to airlift pumping of downhole geothermal fluids. In one example, an airlift system includes a compressor; a gas sparger head in a wellbore of a geothermal well, and a pressure head recycle assembly. The sparger head produces artificial lift of the geothermal fluids by injecting a gas resulting in a difference in density downhole. The entrained gas can be extracted by the pressure head recycle assembly, compressed, and reinjected downhole. The geothermal fluid at the well head can be used in direct use applications or in a thermodynamic cycle to make shaft power. The gas sparger head can include a venturi shaped passage extending through the gas sparger head and a bubble orifice including gas orifices radially spaced about a narrow portion of the venturi shaped passage. The gas orifices can have a corresponding resonant chamber through which the gas (e.g., air) is provided.

The invention provides a multi-mode combined cooling and power generation system based on efficient waste heat utilization and an operation method of the multi-mode combined cooling and power generation system. The multi-mode combined cooling and power generation system comprises an organic Rankine cycle and absorption type refrigeration cycle integrated low-grade cold energy production mode and an organic Rankine cycle and vapor compression type refrigeration cycle integrated medium-grade cold energy production mode. A high-grade cold energy production mode integrating organic Rankine cycle, absorption type refrigeration cycle and vapor compression type refrigeration cycle is adopted, in order to achieve gradient utilization of waste heat, the system considers the waste heat utilization sequence of thermodynamic cycle at the same time, and the waste heat is firstly utilized by the absorption type refrigeration cycle and then recovered by the organic Rankine cycle; waste heat is recycled through the organic Rankine cycle and then is utilized by the absorption type refrigeration cycle, and the waste heat is simultaneously recycled by the absorption type refrigeration cycle and the organic Rankine cycle after being shunted. Efficient cogeneration of cold electricity is achieved through gradient utilization of waste heat and heat-work coupling between circulation, multiple possibilities of a waste heat utilization path are considered, and the waste heat recovery rate is increased.

The invention provides a thermodynamic cycle system applied to a steam turbine. The thermodynamic cycle system comprises a boiler, the steam turbine and a vortex tube. The boiler generates steam with first temperature; the steam turbine discharges a first path of steam with second temperature to the vortex tube, a second path of steam with second temperature is discharged to the liquid inlet of the boiler, the vortex tube separates the first path of steam into hot steam with third temperature and cold steam with fourth temperature, and the hot steam with third temperature is recycled to the steam turbine; the steam turbine drives mechanical equipment through hot steam with the third temperature, cold steam with the fourth temperature is discharged to the liquid inlet of the boiler, the third temperature is higher than the second temperature, and the fourth temperature is lower than the second temperature; wherein the cold steam with the fourth temperature cools the second path of steam to generate cooling liquid, the cooling liquid enters the boiler from a liquid inlet of the boiler, the steam with the first temperature is generated after heating, a vacuum water ring pump and a condenser are omitted, and energy is saved.

The application relates to the technical field of pipeline fixing, and particularly discloses a boiler steam turbine thermal cycle pipeline fixing device and a working method, which comprises a support rod fixedly installed on a wall top, an auxiliary assembly for adjusting the installation angle of a pipeline is arranged on the outer wall of the support rod, an installation ring is arranged at one end of the auxiliary assembly, a fixing ring is slidably connected to one end of the installation ring, and a fixing assembly for quickly fastening the pipeline is arranged in the fixing ring; the fixing assembly is arranged, the cycle pipeline can be quickly fixed, and the auxiliary assembly is arranged, so that the installation angle of the cycle pipeline can be adjusted.

The invention discloses an anti-scaling efficient evaporative water cooling system, which belongs to the technical field of refrigeration and heat pumps, comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling component and a third heat exchanger which are connected through a four-way reversing valve, and is characterized in that the first heat exchanger and the second heat exchanger are connected in series on a refrigerant loop; and in the refrigeration mode, the refrigerant is pre-cooled by the first heat exchanger and then enters the second heat exchanger. According to the invention, the inlet temperature of the evaporative condenser is reduced from the source, and the generation of scale is effectively inhibited; and meanwhile, through thermodynamic circulation of staged cooling and two-stage evaporation, the energy efficiency and low-temperature adaptability of the system in a refrigerating and heating mode are remarkably improved, and the reliability of the system is enhanced.

Reactive working fluid for cyclic thermodynamic conversion machines, said working fluid, forming a monomer / dimer couple, said working fluid comprising a compound capable of reversibly associating / dissociating, during each thermodynamic cycle, by formation / breakage of Van der Waals bonds.

The utility model discloses a hot spring geothermal turbine sustainable power generation system, which comprises a thermodynamic cycle system and a power generation system, the thermodynamic cycle system comprises a condenser and a flash evaporator, the condenser is communicated with the flash evaporator, the flash evaporator is communicated with the power generation system, and the power generation system is communicated with the power generation system. One end of the flash evaporator is used for being communicated with a hot spring geothermal well, and one end of the condenser is used for being connected with a heat dissipation assembly. And the power generation system is connected between the condenser and the flash evaporator and is communicated with the condenser and the flash evaporator to form a thermodynamic circulation loop. According to the technical scheme provided by the utility model, a sealed thermodynamic cycle loop is formed, no pollution emission is generated in the power generation process, the natural environment is not influenced, the performance is reliable, the efficiency is high, the maintenance is basically not needed, the service life is long, and the problems of low efficiency, low cost and the like of the existing organic Rankine cycle power generation technology are solved. And energy sources such as terrestrial heat and hot spring cannot be utilized more efficiently, and the heat exchange efficiency of the whole power generation system is improved.

The invention discloses an energy conversion method and device based on a gravity field gas vertical pressure gradient, and relates to the technical field of gravity field gas thermodynamic cycle and energy conversion. Comprising the steps that a closed circulation channel composed of a gas conveying power unit, a gas conveying expansion unit, an acting output unit and a gas backflow unit is filled with working gas; the working gas at the low position is driven to rise in the vertical direction, adiabatic expansion and acceleration are carried out under the pressure decreasing condition, and gas internal energy and pressure energy are converted into kinetic energy; the high-speed gas is guided into the acting output unit to drive the generator set to generate electricity; and the acting gas naturally settles and is compressed in the backflow channel by virtue of gravity, exchanges heat with the environment in the settling process to recover the initial state, and then enters the power conveying unit again. According to the invention, a closed circulating acting path utilizing the vertical pressure gradient of the gravity field is constructed, and the comprehensive utilization efficiency of low-grade heat energy and gas pressure energy is improved.

The invention relates to a coaxial heat exchanger (1) for reversible operation with an inner tube (2) on the outside (21) of which ribs (25) with a rib height (H1) are formed, and with an outer tube (3) arranged coaxially to the inner tube (2) on the inside (32) of which projections (35) are formed which extend substantially radially from the tube wall (30) of the outer tube (3) and continuously along the inside (32) of the outer tube (3). The projections (35) of the outer tube (3) form an angle of at least 60° with the ribs (25) on the outside (21) of the inner tube (2) and are connected to them, thereby forming several parallel, flowable channels (4) between the tube wall (30) of the outer tube (3) and the tips (26) of the ribs (25) of the inner tube (2), each having a cross-sectional area (A2) measured transversely to the flow direction and a channel height (H2).Adjacent channels (4) are each separated from one another by a projection (35) of the outer tube (3). The ratio of the cross-sectional area (A1) of the inner tube (2) to the sum of the cross-sectional areas (A2) of all channels (4) is at least 0.5 and at most 5. The invention further relates to a thermodynamic cycle with such a coaxial heat exchanger and a method for operating such a cycle.

The utility model discloses a coal-fired unit rapid and flexible peak and frequency regulation system based on high-temperature working medium energy storage / supply, which relates to the field of conventional power generation technology and energy storage technology and comprises a coal-fired unit thermodynamic cycle system and a high-temperature furnace water energy storage / supply system, the high-temperature furnace water storage and supply / energy system is deeply coupled with the coal-fired unit thermodynamic cycle system, and the power capability and the power generation load of the coal-fired unit are quickly improved by reducing the steam extraction amount of each stage of a steam turbine in the coal-fired unit thermodynamic cycle system, so that the climbing rate of the coal-fired unit is improved; and meanwhile, through direct cooperative energy supply of the high-temperature boiler water storage / energy supply system, the high-enthalpy-value working medium stored by the high-temperature boiler water storage / energy supply system heats boiler feed water in the regenerative system, the temperature of the boiler feed water is increased, then the boiler steam yield is increased, and the rapid variable load response capacity of the coal-fired unit is improved.

A plant and method for energy management that performs a closed thermodynamic cycle conversion (TTC) between a gas holder (2) for storing gaseous carbon dioxide at a first storage pressure (PAG') in equilibrium with atmospheric pressure and a mass reservoir (11) for storing liquid carbon dioxide at a second storage pressure (PA'H), first in one direction during the filling phase and then in the opposite direction during the release phase. During the filling phase, it is provided to remove heat from the mass reservoir (11) to condense a portion of the vapor phase of carbon dioxide contained therein and to maintain the second storage pressure (PA'H) constant or substantially constant. During the release phase, it is provided to transfer heat to the mass reservoir (11) to evaporate a portion of the liquid phase of carbon dioxide contained therein and to maintain the second storage pressure (PA'H) constant or substantially constant.

The utility model discloses a carbon capture system after industrial combustion, which belongs to the technical field of carbon capture and comprises an absorption tower and a desorption tower, and the absorption tower is connected with the desorption tower through a barren liquor pipeline and a rich liquor main pipeline; a top outlet of the desorption tower is connected with a condenser through a steam pipeline; the barren liquor pipeline is provided with a barren / rich liquor heat exchanger; the steam pipeline is provided with a heat exchanger; the rich liquid main pipeline comprises a first rich liquid pipeline passing through the lean / rich liquid heat exchanger and a second rich liquid pipeline passing through the heat exchanger; the interstage cooling pipeline is arranged on the absorption tower; a second cooler and a first centrifugal pump are arranged on the interstage cooling pipeline in series. Through the interstage cooling pipeline, the interior of the absorption tower which is in reaction is cooled, and the situation that the absorption rate of CO2 is reduced and increased due to temperature rise is avoided; one path of rich liquor passes through a lean / rich liquor heat exchanger and is heated by utilizing waste heat of high-temperature lean liquor, and the other path of rich liquor passes through a heat exchanger and is preheated by utilizing waste heat of high-temperature steam; and the thermodynamic cycle efficiency of the system is optimized.

A kind of topology-driven thermodynamic cycle system steady-state operation data acquisition method;The thermodynamic cycle system steady-state operation data acquisition method in the present application is to obtain the topology structure corresponding to various devices in the constructed thermodynamic cycle system, establish a topology standard information library after analyzing and identifying the corresponding topology structure, establish the corresponding constraint equation according to the topology standard information library, obtain the output system steady-state operation data through the calculation of the corresponding constraint equation, the process of obtaining the topology structure corresponding to various devices in the constructed thermodynamic cycle system is to obtain the topology structure corresponding to the constructed thermodynamic cycle system, determine the composition structure and connection relationship corresponding to the topology structure, and identify the composition structure and connection relationship corresponding to the topology structure;The present application analyzes the system topology structure and automatically constructs the system thermodynamic equation, realizes the unified modeling and solving of the thermodynamic cycle system, so as to improve the generality and standard corresponding automation of system modeling.

The present invention relates to an internal combustion engine provided with an optimized intake system. The engine derives from a traditional diesel cycle engine but is modified and optimized in its intake system to achieve performance superior to that of traditional diesel engines. According to the invention, some main characteristics of the timing system are modified to obtain, when required, a specific behavior of the intake valve lift curve. By operating in this way, it is possible to carry out an internal recirculation of the burnt gases, a reforming of the fuel (for example, from ammonia to hydrogen), a thermodynamic cycle similar to a Miller cycle.

A method includes using an isochoric displacement through a valved or ducted thermal regenerator to raise the pressure of a vaporized reactant or vaporized reactant constituent as a means to regeneratively capture waste exhaust heat from the product or product constituents of a previous endothermic dissociation of a previous charge of said reactant.

The invention relates to a numerical analysis method for condensation heat exchange capacity of a plate-fin heat exchanger, which comprises the following steps of: constructing a reverse Carnot principle thermodynamic cycle experimental device, and selecting the plate-fin heat exchanger with sawtooth fins; working conditions are designed according to an improved Wilson graphical method, and experimental parameters such as inlet and outlet temperature and flow and fin structure and working medium physical property parameters are obtained; a numerical model is built based on energy conservation and the Newton cooling law, a water side heat exchange coefficient empirical formula and a refrigerant side heat exchange coefficient empirical formula are fitted, the water side adopts an improved Wilson graphical method considering fluid properties, and an equivalent Reynolds number containing gas-liquid two-phase parameters is introduced into the refrigerant side; verification shows that the water side low Reynolds number error is less than or equal to 15%, the high Reynolds number is less than or equal to 10%, and the refrigerant side error is within + / - According to the method, continuous data estimation is realized through numerical fitting, the structure of the power-assisted heat exchanger is optimized, and a rapid and accurate heat exchange performance design tool is provided for an automobile R1234yf system.

A process comprises: implementing a closed thermodynamic cyclic transformation (TTC), first in one direction in a storage phase and then in an opposite direction in a release phase, between an enclosure (2) for storing a working fluid other than atmospheric air in the gaseous phase and in pressure equilibrium with the atmosphere, and a reservoir (6) for storing said working fluid in liquid or super-critical phase. The storage phase comprises: A-B preheating the working fluid coming from the enclosure (2); B-C compressing the working fluid a first time using external energy to be stored; C-D removing a first amount of heat (Q1) from the working fluid to cool it a first time and storing the first amount of heat (Q1); D-E further cooling the working fluid by removing excess heat (QE) from the working fluid; E-F compressing the working fluid a second time using additional external energy to be stored; F-G removing a second amount of heat (Q2) from the working fluid to cool it a second time and storing the second amount of heat (Q2); G-H removing a third amount of heat Q3 from the working fluid to increase a density of the working fluid, storing the third amount of heat Q3, and storing the working fluid in the reservoir (6) in liquid or super-critical phase. At least part of the excess heat QE removed in the sub-phase D-E is recovered and used in the sub-phase A-B to preheat the working fluid from the enclosure (2).

Various examples are provided related to airlift pumping of downhole geothermal fluids. In one example, an airlift system includes a compressor; a gas sparger head in a wellbore of a geothermal well, and a pressure head recycle assembly. The sparger head produces artificial lift of the geothermal fluids by injecting a gas resulting in a difference in density downhole. The entrained gas can be extracted by the pressure head recycle assembly, compressed, and reinjected downhole. The geothermal fluid at the well head can be used in direct use applications or in a thermodynamic cycle to make shaft power. The gas sparger head can include a venturi shaped passage extending through the gas sparger head and a bubble orifice including gas orifices radially spaced about a narrow portion of the venturi shaped passage. The gas orifices can have a corresponding resonant chamber through which the gas (e.g., air) is provided.

The present invention is relative to a thermal machine (100), operating with a thermal fluid for realizing a thermodynamic cycle, comprising a power unit (1) and a motor circuit (10). The power unit comprises a first operating chamber (3A) and a second operating chamber (3B), housing power transformation organs connected with each other by means of a drive shaft (8). The thermal machine comprises also a lubrication branch (50), operatively active on a casing (2) of the power unit and configured for being affected by a first flow of the thermodynamic fluid for lubricating at least the drive shaft.

A modular power generation island (100) for nuclear reactors is disclosed. The modular power generation island (100) is configured to circulate a heat transfer fluid in heat exchange relationship, by means of one or more primary heat exchangers (220), with a source of thermal energy (200) to heat the heat transfer fluid in one or more primary heat exchangers (220), wherein the modular power generation island (100) comprises a fluidic interconnection interface (11, 12), a plurality of thermodynamic machines (19, 20, 21, 22), at least one supporting frame (160) and a mechanical coupling system, the fluidic interconnection interface (11, 12) comprising at least one inlet fluidic connection (11) for the heat transfer fluid from the primary heat exchanger (220) and at least one outlet fluidic connection (12) for the heat transfer fluid to the primary heat exchanger (220), the plurality of thermodynamic machines (19, 20, 21, 22) being fluidically coupled with one another along a circuit according to a thermodynamic cycle configured to thermodynamically transform the heat transfer fluid to convert heat into power load and subsequently direct it to primary heat exchanger (220), the plurality of thermodynamic machines (19, 20, 21, 22) being arranged on the structural frame (160) and the mechanical coupling system being configured to structurally couple the modular power generation island (100) with a supporting structure adjacent to the source of thermal energy (200). A kit of components of the modular power generation island (100) and a method for thermodynamically transforming heat from one or more sources of thermal energy (200) are also disclosed.

The invention relates to the technical field of heat pump control, and discloses a self-adaptive load regulation air source heat pump system and a control method, and the system comprises a physical execution layer used for executing thermodynamic circulation; the state sensing module is used for collecting physical parameters in real time and calculating and generating an actual thermodynamic state vector; the optimization path database is used for storing a pre-generated optimal thermodynamic state path and a corresponding time sequence feedforward control sequence; the transient path planning module is used for responding to a target load and a response time limit, and matching and calling the optimal path and a time sequence feedforward control sequence based on an actual thermodynamic state vector; and the path tracking execution module is used for receiving the path and the feed-forward sequence, generating a correction control signal based on the state deviation vector, superposing the correction signal and the feed-forward sequence, generating a final time sequence control instruction and issuing the final time sequence control instruction. According to the method, by optimizing the path database and transient path planning, response time limit self-adaption is achieved under low computing power, and transient energy efficiency and adjusting speed are both considered.

The invention discloses an engine thermodynamic cycle parameter calculation method based on core engine matching, and the method comprises the following steps: carrying out the unified modeling of all parts of a main airflow channel of an engine based on GSP numerical simulation software, and forming a complete machine model group; performing parameter calculation and complete machine performance calculation on each section of the complete machine model group to obtain a core performance index; simulation calculation is executed, and a whole machine working point of the engine is obtained; judging whether the whole machine working point meets the index requirement or not, and if the whole machine working point does not meet the index requirement, executing the simulation calculation again; and if the index requirements are met, the whole machine working point of the engine is output. According to the technical scheme, the initial characteristic parameters of the core engine can be adjusted according to the calculation result, and iterative calculation is repeated to achieve the effect of improving the unit thrust parameter scheme of the engine.

The invention provides a flight-thrust integrated performance conceptual design method based on multidisciplinary coupling, and relates to the field of overall design of aircraft propulsion systems, and the flight-thrust integrated performance conceptual design method comprises the following steps: S1, constructing a joint analysis model of geometric-pneumatic lift-drag characteristics of an aircraft; s2, constructing a component-level aviation propulsion system performance simulation model; and S3, establishing and solving a ternary matching relationship of the flight-thrust integrated design, wherein the ternary matching relationship is composed of a designed take-off total weight matching equation, a designed take-off thrust matching equation and a wing plane area matching equation. According to the method, an aircraft model based on geometric body approximate substitution and a component-level aero-engine steady-state performance simulation model are effectively integrated into an aircraft concept design process, so that conjoint analysis and design of aircraft concept design and conjoint analysis and design of aircraft geometric preliminary design and aerodynamic characteristic conjoint analysis and aero-engine thermodynamic cycle design are realized; and a foundation is laid for realizing global efficiency design optimization of the flight-push system.

The present invention relates to the field of energy recovery, and discloses a secondary steam water recovery and energy recovery device and method, the secondary steam water recovery and energy recovery device comprises: a washing tower provided with a tower liquid outlet; the condensate delivery pump is connected to the heat exchanger through a pipeline and is connected to the reflux inlet of the washing tower through a pipeline; the heat exchanger is connected to the tower liquid outlet through a filter and is used for receiving and cooling the condensate from the washing tower and conveying the cooled condensate to the condensate conveying pump; and a working medium thermodynamic cycle unit. Through cooperation of the working medium thermodynamic cycle unit and the heat exchanger, condensate waste heat is fully absorbed, low-grade heat energy is converted into a high-quality heat source with the temperature ranging from 45 DEG C to 160 DEG C, the energy utilization rate is greatly increased, the water recovery rate not lower than 90% is achieved by combining the washing tower, the coalescence recoverer and the like, impurities are removed through multiple filtering, and equipment scaling corrosion is avoided. The heat exchanger is high in integration level, low in energy consumption and stable and reliable in operation.

The present invention relates to an internal combustion engine provided with an optimized intake system. The engine derives from a traditional diesel cycle engine but is modified and optimized in its intake system to achieve performance superior to that of traditional diesel engines. According to the invention, some main characteristics of the timing system are modified to obtain, when required, a specific behavior of the intake valve lift curve. By operating in this way, it is possible to carry out an internal recirculation of the burnt gases, a reforming of the fuel (for example, from ammonia to hydrogen), a thermodynamic cycle similar to a Miller cycle.

A method of operating a mechanical heat engine according to an internally reversible thermodynamic cycle may comprise four piston-cylinders, with extending connecting rods of identical stroke lengths such that three of the piston-cylinder systems have an identical bore and the fourth cylinder has a smaller bore. According to such a method, the smaller-bore piston-cylinder is connected via the piston rod to an adjacent piston-cylinder with the rods fully extended one full stroke length; and the remaining piston-cylinders are connected via the piston rod, with the rods extended less than a full stroke length.

The application discloses a compressed air energy storage system and method with hydrogen afterburning, and belongs to the energy storage field.The system comprises a compression module, an expansion power generation module, a heat storage module, a heat release module, a performance heating module, a steam-water thermodynamic cycle module and a cooling module.The compression module is used for compressing and storing air.The expansion power generation module is used for releasing the compressed air into a turbine for expansion and power generation.The heat storage module is used for absorbing and storing heat generated in the air compression process.The heat release module is used for releasing the stored heat to air and hydrogen.The performance heating module is used for heating hydrogen.The steam-water thermodynamic cycle module is used for absorbing flue gas heat for further expansion and power generation.The compressed air energy storage system and method with hydrogen afterburning greatly reduce the flow of compressed air, reduce the parameters of the air storage, improve the cycle efficiency of long-time energy storage, and make the system more flexible and suitable for the requirements of a new power system.