56 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.

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.

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 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.

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.

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.

A stand-alone power plant highly integrated with solar-based renewable energy sources is disclosed. The power plant comprises at least one power unit connected to a combined cycle gas turbine power plant and to a photovoltaic power generation unit, and a concentrated solar power generation unit is incorporated into the combined cycle gas turbine power plant. The thermal energy storage unit is also part of the power plant to collect heat from the CSP and optionally from the PV unit and to supply heat to the second thermodynamic cycle. Also disclosed is a method for operating a power plant by minimizing, even thoroughly eliminating, long-term and short-term fluctuations.

The invention relates to a reciprocating internal combustion engine with direct injection operating according to a modified Otto or Diesel cycle in order to re- duce the operating temperature, when maximum power is not required, with a consequent reduction in heat loss. The engine subject of the invention absorbs minimal power in the suction phase and makes it possible, when maximum power is not required, to increase the compression ratio and consequently the efficiency. The engine subject of the invention provides, for each cylinder, the use of two check valves in the suction pipe and a motorized inlet valve whose opening cycle varies according to the required power. According to a variant of the engine subject of the invention, the latter allows the replacement of the re- sidual burnt gases present in the combustion chamber of each cylinder with air and recirculated gases, pre-loading one of the two check valves mentioned above. The engine subject of the invention therefore allows the replacement of the residual burnt gases with air in order to further reduce the operating tem- peratures of the engine at the same required power, or to increase its filling, and therefore the power, at the same operating cycle.

The absolute novelty of the new combined SEOL cycle is represented by the recuperative steam generator (GVR), which completely replaces the regenerator of the prior art, and which reduces the energy difference (Q) between the temperature at the end of expansion and the temperature at the time of almost complete condensation of the thermal fluid. R ) can be recovered and then this large energy difference can be used to generate steam that can be fully reused in preheating the mixture, contributing significantly to an increase in the overall energy yield of the cycle and an increase in the unit power of the heat engine. The use of the new combined SEOL cycle allows for the following main advantages: A. An increase in the unit power of the heat engine due to an increase in the enthalpy of the mixture introduced into the expander (ES); B. Energy recovery (Q) performed in the recovery steam generator (GVR). R ) followed by a significant increase in the overall heat yield; C the possibility of lubricating the cylinder and / or sliding chamber of the piston of the heat engine, reducing mechanical friction and wear and consequently increasing the overall yield of the engine itself; D the possibility of using multiple heat sources (Q) capable of heating the mixture circulating in the superheater (SR) to a sufficient temperature H ) the possibility of using; and E the possibility of designing and industrializing new "heat engines" characterized by high overall yields and low production costs.

The invention belongs to the technical field of nuclear power operation management, and particularly relates to a nuclear power conventional island thermodynamic system data correction method. The method includes the following steps that a nuclear power unit conventional island principle thermodynamic system diagram is used for disassembling the nuclear power unit conventional island principle thermodynamic system diagram; establishing constraint equations for the disassembled subsystems one by one; through topology analysis, physical quantities representing the same meaning in the disassembled system are combined; establishing a Jacobian matrix for column-by-column scanning analysis; constructing an optimization problem of a complete thermodynamic cycle system; and correction values of various parameters of the complete thermodynamic cycle system are obtained. The method has the beneficial effects that the conventional island thermodynamic system is disassembled into a plurality of subsystems, the correction value of the thermodynamic parameter of each subsystem can be stably obtained by utilizing the characteristic that the number of optimization variables of the subsystems is small, and the correction value is used as an iteration initial value for solving the complete thermodynamic cycle system optimization algorithm, so that the solving stability is effectively improved.

Thermal energy transmission from a cryocooler cold finger is enhanced by means of a high thermal conductivity material used for or placed adjacent the cold finger end cap. In addition, the actual or effective surface area contacted by the working gas proximate the endcap is increased, thereby increasing the convective heat transfer coefficient. These features permit the coolest gas expansion space in the cold finger to be provided within the highly thermally conductive end cap, unlike many conventional designs in which the cold finger of low thermally conductive metal forms the expansion space side walls and the endcap forms only the axially facing outer surface in contact with the cooled equipment. Having the expansion space built into the high thermally conductive end cap reduces the temperature drop between the load to be cooled and the gas (e.g., helium), thus increasing the thermodynamic cycle efficiency.

Modern thermal power plants based on classical thermodynamic power cycles suffer from an upper bound efficiency restriction imposed by the Carnot principle. This disclosure teaches how to break away from the classical thermodynamics paradigm in configuring a thermal power plant so that its efficiency will not be restricted by the Carnot principle. The power generation system described herein makes a path for the next generation of low-to-moderate temperature thermal power plants to run at significantly higher efficiencies powered by renewable energy. This disclosure also reveals novel high-performance power schemes with integrated fuel cell technology, driven by a variety of fuels such as hydrogen, ammonia, syngas, methane and natural gas, leading toward low-to-zero emission power generation for the future.

A temperature regulating device comprising a refrigerant circuit (1) configured to perform a thermodynamic cycle, the circuit (1) comprising a first branch (36) comprising a first heat exchanger (12) for exchanging heat with a first heat transfer fluid and a second branch (38) comprising a second heat exchanger (38) for exchanging heat with a second heat transfer fluid, both extending from a single first shunt point (40) of the circuit. The second branch (38) comprises a second heat exchanger (14) for exchanging heat with a second heat transfer fluid, the circuit being configured to supply high pressure refrigerant fluid in parallel from the first shunt point (40) to the first and second heat exchangers in at least one heat pump mode for heating the first and / or second heat transfer fluid.

Systems and methods are disclosed that provide an integrated carbon sequestration and power generation system. The integrated carbon sequestration and power generation system may include a thermodynamic cycle configured to receive biomass and output heat and power, and a direct air capture system configured to receive at least a portion of the heat and power output from the thermodynamic cycle. Other aspects are described and claimed.

A heat exchanger based on solution to pinch point in a thermodynamic cycle includes a heat exchange core and a cover plate. The heat exchange core is sealed by the cover plate. Through coordinated structure of first and second flow channels and branch flow channels on alternately stacked cold side and hot side heat exchange plates, the heat exchanger of the present application improves heat exchange efficiency and avoids the adverse effects caused by pinch points. A Brayton cycle system including the heat exchanger is also provided.

The utility model discloses a coal fired unit quick peak load regulation and frequency modulation system of high temperature working medium heat storage of heat recovery system coupling relates to conventional heating power electric technology and energy storage technical field, including coal fired unit thermodynamic cycle system and high temperature working medium heat storage system, wherein, high temperature working medium heat storage system and coal fired unit thermodynamic cycle heat recovery system carry out the deep coupling, through the mutual cooperation of reducing steam turbine each stage extraction steam amount and high temperature working medium heat storage system energy supply, realizes the quick combined peak load regulation and frequency modulation of unit. First, when the unit needs quick load, through reducing steam turbine each stage extraction steam amount, realizes the quick promotion of unit power output, at the same time, the high temperature, high pressure saturated water stored in high temperature working medium heat storage tank produces a certain amount of saturated steam through pressure reduction to replace the boiler feed water in steam turbine each stage extraction heating heat recovery system, thereby guaranteeing that the boiler feed water temperature still keeps unchangeable or has the improvement, and then realizes the quick promotion of coal fired unit variable load response ability.

This application relates to the field of air conditioning and industrial dehumidification technology, and discloses a waste heat recovery type combined cooling and heating single-rotor dehumidifier system, including a dehumidifier housing and an external carbon dioxide combined cooling and heating main unit. A carbon dioxide deep dehumidification coil and a dehumidification rotor processing area are arranged along the airflow direction in the processing air channel, while a carbon dioxide condenser and a dehumidification rotor regeneration area are arranged in the regeneration air channel. The main unit connects the coil and condenser through pipelines to construct a transcritical carbon dioxide thermodynamic cycle, transferring the heat absorbed by the deep dehumidification coil to the condenser as a regeneration heat source for release. The system is also equipped with a tiered heating structure consisting of resistance heating and the condenser, as well as an exhaust waste heat recovery device. The central control system performs regeneration heat compensation and optimal high-pressure control based on sensor feedback. This invention reduces system energy consumption and improves operational stability under varying operating conditions through an internal energy coupling mechanism.