77 results about "Internal energy" patented technology

The invention discloses a GKS turbulence transition calculation method based on an expanded Maxwell velocity distribution function, and belongs to the technical field of turbulence numerical calculation. The method comprises the following steps of: 1, adding an internal energy item of equivalent turbulent energy into a Maxwell velocity distribution function, and constructing an expanded Maxwell velocity distribution function; 2, selecting a turbulence transition model according to different incoming flow conditions and calculation model appearances, and calculating source items; according to the method, the GKS method is expanded and applied to simulation calculation of hypersonic turbulence transition, the internal energy item of equivalent turbulent energy is added into the Maxwell velocity distribution function, the expanded Maxwell velocity distribution function is constructed only by adding the turbulent energy item into the Maxwell velocity distribution function according to the expanded GKS calculation method for transition and turbulence, and the calculation efficiency is improved. And a turbulence transition model is combined to calculate a source item, so that a new expansion algorithm can be obtained.

The invention relates to the technical field of computational fluid mechanics and combustion science, in particular to a flame surface simulation method and device for supersonic combustion, and the method comprises the steps: solving a continuity equation, a momentum equation, a mixing fraction equation and an energy equation in a supersonic cold state mixing process; obtaining a mixing fraction distribution, a pressure distribution and a mixture total internal energy distribution; calculating a one-dimensional flame to construct a four-dimensional table of at least one mixing fraction-progress variable-oxidant side total internal energy-pressure based on the one-dimensional flame; and acquiring progress variable information of the supersonic combustion based on the four-dimensional table to obtain a flame surface simulation result of the supersonic combustion. According to the method, two control variables of pressure and oxidant side total internal energy can be introduced on the basis of a traditional small flame model according to the characteristics of supersonic combustion, and an Euler random field method is introduced to describe a joint probability density distribution function between the control variables, so that the influence of a preset probability density function is reduced, and the calculation precision is improved.

The invention belongs to the technical field of deformation monitoring of pipe jacking operation, and particularly discloses a pipeline end deformation monitoring system for deep earthing long-distance pipe jacking operation. Defining external energy and internal energy of each contour unit of the butt-welded pipeline, and judging whether to carry out repair welding operation on each contour unit or not; judging whether to add a steel pipe support measure to each contour unit or not by detecting the shaft body inclination state and the shaft body ovality of each contour unit of the butt-welded pipeline; by determining the butt joint axial coordinate line on the contour of the shaft body of the butt-welded pipeline, the pipe jacking operation strength of the end of the pipeline to be subjected to butt welding is determined, and whether the soil body around the pipeline jacking path is reinforced or not is judged; potential deformation risks are found in time by judging the jacking operation deformation risks of the ends of the pipelines to be subjected to butt welding, and therefore preventive measures are taken before jacking operation.

An intelligent heat pump system autonomously manages thermal regulation in heating and cooling modes using real-time sensor data and adaptive control algorithms. The system comprises a heat pump integrated with components including a supply valve, regulating valve, return valve, and compressor expander, along with multiple sensors configured to monitor temperature and pressure conditions at various points, including the reservoir, cold side, and hot side. A removable memory stores a directive file containing operational parameters, including target temperatures, valve timing, and pressure control data. A control unit with a processor executes firmware modules that include sensor calibration routines, motor and valve control logic, and an adaptive algorithm that continuously compares real-time sensor input against target parameters. Based on deviations, the system dynamically adjusts component operations to regulate refrigerant flow, internal energy, temperature, and pressure, thereby driving the system toward a steady-state thermal condition. This autonomous system ensures efficient performance, enhanced temperature stability, and optimal energy usage across a range of varying environmental conditions.

The invention belongs to the technical field of fluid magnetization, and particularly relates to a fluid magnetization treatment method and system.The fluid magnetization treatment system comprises a controller and a processor, the processor comprises a shell, two connectors are installed on one side of the shell, an adapter is installed on the other side of the shell, a coil bin is formed in the inner wall of the shell, and a coil is arranged in the coil bin; the coil is electrically connected with a controller through an adapter, a U-shaped oil way pipe is installed in the shell, and fuel flows in the oil way pipe. Fuel oil is magnetized through an alternating magnetic field, fuel oil molecules are attracted to vibrate along with alternating of the magnetic field, the internal energy of the fuel oil molecules is improved, the fuel oil molecules are in a quasi-excitation state, and therefore the combustion efficiency and the combustion degree of the fuel oil are improved, meanwhile, the distance between the fuel oil molecules in high-frequency vibration is increased, atomization is more sufficient during atomization, combustion is facilitated, and the fuel oil is more environmentally friendly. And the combustion efficiency of the fuel is further improved.

The invention discloses a support carrier energy recovery system and method, and belongs to the technical field of energy recovery, and the support carrier energy recovery system comprises an oil tank, a hydraulic pump, a first one-way valve, a two-position three-way electromagnetic directional valve A and a three-position three-way electromagnetic directional valve A. The invention aims at the support carrier energy recovery system; energy released by the lifting oil cylinder is used as a power source of the variable-amplitude oil cylinder, so that effective cyclic utilization of internal energy of the hydraulic system is realized. The system not only improves the energy efficiency of the system, but also effectively reduces the energy consumption of the system. Secondly, by designing the scheme that two sets of hydraulic circuits share one set of energy recovery line, the space requirement of the system is greatly saved, the system structure is simplified, the system adopts a two-stage energy recovery strategy, the energy recovery efficiency and stability are greatly improved, and the energy recovery cost is reduced. The problems of low energy conversion efficiency, low energy recovery efficiency and large system pressure fluctuation in a traditional mode are solved.

The invention discloses a coal sample gas outburst precursor early warning system, which is used for observing and researching parameter change in the early stage of gas outburst, judging the evolution law of the gas outburst precursor, and releasing energy in a coal body by loading the coal body and enabling the coal body to be deformed and fractured. Coal and gas outburst premonition early warning is achieved through the outburst early-stage related parameter change rule; under the true triaxial condition, stress loading and true ground stress loading are jointly achieved by combining the sealing plate of the gas outburst weak plane and the loading plate, the arrangement space and range of the gas outburst weak plane are large, rupture disk arrangement can be conducted at the proper position, and outburst from the gas weak plane is achieved; various parameters before gas outburst are measured under the real ground stress condition from the aspects of strain, resistivity, temperature, pressure flow and the like, so that coal and gas outburst precursor measurement is realized, and finally coal and gas outburst precursor early warning is realized.

An intelligent heat pump system autonomously manages thermal regulation in heating and cooling modes using real-time sensor data and adaptive control algorithms. The system comprises a heat pump integrated with components including a supply valve, regulating valve, return valve, and compressor expander, along with multiple sensors configured to monitor temperature and pressure conditions at various points, including the reservoir, cold side, and hot side. A removable memory stores a directive file containing operational parameters, including target temperatures, valve timing, and pressure control data. A control unit with a processor executes firmware modules that include sensor calibration routines, motor and valve control logic, and an adaptive algorithm that continuously compares real-time sensor input against target parameters. Based on deviations, the system dynamically adjusts component operations to regulate refrigerant flow, internal energy, temperature, and pressure, thereby driving the system toward a steady-state thermal condition.

This application discloses an auxiliary braking device, method, system, medium, equipment, and vehicle. The auxiliary braking device includes: a housing with a cavity formed inside; a drive shaft, connected to the wheel and at least partially disposed within the cavity; an electromagnet disposed within the cavity; and a magnetorheological fluid filling the cavity. The auxiliary braking device is configured to utilize the internal frictional adhesion force generated by the magnetorheological fluid moving within the cavity to convert the kinetic energy of the vehicle into the internal energy of the magnetorheological fluid, thereby achieving auxiliary braking. The auxiliary braking device provided by this invention achieves this by using the adsorption and release of the magnetorheological fluid under the control of a magnetic field. During normal driving, it does not affect the vehicle's power transmission; when deceleration is required, it utilizes the internal friction of the magnetorheological fluid itself to convert kinetic energy into internal energy, thus achieving an auxiliary braking effect. This device has a simple structure and is easy to operate, and can greatly protect the safety and reliability of the vehicle's main brake disc, effectively eliminating or reducing the occurrence of brake failure during long-term downhill driving or continuous deceleration.

The invention discloses a compressible fluid reducing vortex method and device, and belongs to the technical field of fluid machinery and jet propulsion. The problems that in the prior art, the energy loss is large, the efficiency is low, and the gas temperature is sharply increased in the compression process are solved. Efficient and controllable conversion among fluid pressure energy, internal energy and kinetic energy can be achieved, an air injection device based on the method can more fully convert heat energy into directional injection kinetic energy through the synergistic effect of acceleration and vortex elimination guide vanes, and the propelling efficiency is remarkably improved; and the stable recovery and conversion of kinetic energy are realized through vortex expansion, and an approximately isentropic mild pressurization process can be realized, so that the temperature rise is obviously inhibited, and the compression energy consumption and the cooling requirement are fundamentally reduced.

The aluminum steel welding production line transfer trolley reversing device comprises a supporting platform arranged on the same side of a sending-out platform and an entering platform, a containing hole is formed in the middle of the supporting platform, a rotating platform matched with the containing hole is arranged at an opening of the containing hole, and two sets of rails are symmetrically arranged at the upper end of the rotating platform; a supporting cylinder is coaxially arranged at the lower end of the rotating platform and rotationally connected with the rotating platform, and a driving part is arranged on one side of the supporting cylinder and used for driving the rotating platform to rotate to a set angle; according to the limiting structure, when the wheels of the rail car pass through the limiting structure, kinetic energy of the wheels can be converted into internal energy while the wheels are limited by the limiting structure, the working intensity of a braking system of the rail car is reduced, and the service life of the braking system of the rail car is prolonged.

The invention relates to the technical field of inertia flywheel control, in particular to a control method and device of an inertia flywheel system. The method comprises the following steps: when frequency fluctuation occurs in a power grid, firstly obtaining additional inertia needing to be supplemented by an inertia flywheel system, the speed of a flywheel rotor and the rotating speed of a synchronous phase modifier; the acceleration of the flywheel rotor is determined according to the additional inertia and the speed of the flywheel rotor; the additional electromagnetic power of the electromagnetic coupler is determined according to the acceleration of the flywheel rotor, the speed of the flywheel rotor and the rotating speed of the synchronous phase modifier; finally, the inertia flywheel system is controlled according to the additional electromagnetic power, the rotating speed of the synchronous phase modifier and the speed of the flywheel rotor, so that the internal energy flow path of the system can be optimized, the problem of power circulation when secondary equipment shares a direct-current bus is avoided, and the overall energy utilization rate of the inertia flywheel system is remarkably 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.

This invention belongs to the field of energy storage and power generation technology, and particularly relates to an integrated compressed air energy storage system and method that combines gas and thermal storage. The system includes a compression subsystem, an expansion subsystem, and a double-layered air storage tank. The double-layered air storage tank comprises an inner tank and an outer tank nested together, with a sealed interlayer between them. The sealed interlayer is filled with a thermal storage medium. The air inlet of the compression subsystem and the air outlet of the expansion subsystem are both connected to the external atmospheric environment. The air outlet pipeline of the compression subsystem and the air inlet pipeline of the expansion subsystem pass through the outer tank and connect to the inner tank. The outer tank wall is covered with insulation material. This invention has a small footprint, reduces energy loss during compressed air energy storage, and significantly improves the conversion efficiency between electrical energy and the internal energy of compressed air.

The application discloses a kind of based on acceleration sensor's automobile safety air bag gas generator performance test method, utilize rigid container, piston, high-speed camera, refrigeration type infrared thermal imager, pressure sensor, acceleration sensor, data recording device;Through the linear motion of piston, indirectly measure the energy that air bag gas generator combustion converts into gas kinetic energy, through the temperature change of gas and air bag gas generator metal shell, indirectly measure the energy that air bag gas generator combustion converts into gas internal energy and converts into air bag gas generator metal shell internal energy, and obtain effective work ratio, and can monitor whether the test process produces flaming and the highest gas temperature around air bag gas generator inflation hole.The present application has reliable theoretical basis, convenient operation, accurate measurement result, provides the test and solution method of multiple-dimension air bag gas generator performance evaluation index, and provides certain technical support for actual research and production.

The present invention discloses a compressor volume flow model of a diesel engine turbocharger in a marine engine simulator, including a kinetic energy increase module, which is used to obtain the flow velocity of the working medium entering the compressor through a sensor at the compressor inlet, calculate the mechanical energy of the working medium after entering the compressor according to the flow velocity of the working medium, calculate the inlet enthalpy value of the working medium before entering the compressor according to the specific heat capacity at constant pressure and the adiabatic temperature of the working medium, and calculate the total energy of the working medium after entering the compressor according to the mechanical energy obtained by the working medium and the inlet enthalpy value of the working medium; a kinetic energy to internal energy module, which is used to calculate the stagnation temperature and stagnation pressure of the working medium in the compressor according to the total energy of the working medium after entering the compressor; an internal energy to kinetic energy module, which is used to calculate the flow velocity of the working medium at the compressor outlet, calculate the mass flow rate of the working medium per unit time according to the flow velocity, and convert the mass flow rate of the working medium into a volume flow rate. The present invention reduces the dependence on compressor performance measurement data and improves the model accuracy.

The present application relates to compressed air energy storage technology field, specifically disclose a kind of compressed air energy storage process energy loss measurement method based on force heat flow simulation test.The present application is under the guidance of force heat flow coupling similarity criterion dynamically collected cavern air pressure and temperature, and uses gas internal energy and heat change calculation formula to calculate the energy loss of gas storage stage, realize the energy loss of gas storage stage in simulation test process and analysis.The method of the present application not only greatly reduces the high capital investment and long time period of large-scale simulation test in traditional method, but also significantly improves the test efficiency and research feasibility, provides more scientific, accurate and reliable technical support for energy efficiency optimization of compressed air energy storage system.

A kind of hydraulic-compressed air coordinated energy storage device and method, including water pool, water inlet, water outlet, gas injection device, gas storage device, compressed air generator and water turbine generator;Water pool is provided with water inlet at one end, and is provided with water outlet at the other end, water inlet is higher than water outlet, and water outlet is connected water turbine generator;Gas storage device is arranged in the water pool, and one end of gas storage device is connected gas injection device, and the other end is connected compressed air generator, and compressed air generator and gas injection device are all outside the water pool.The present application can realize the electric energy of new energy that cannot be connected to network is converted into the gravitational potential energy of water and the internal energy of compressed air respectively, and then is utilized, so as to reach the purpose of efficient energy storage.

The invention relates to the technical field of energy, in particular to a trigeneration system, an operation method, equipment, a medium and a product to improve the energy conversion efficiency, in the energy storage process of the system, an air compression module compresses air from a normal pressure state to a high pressure state through a compressor, and the air is stored in an air storage hole, so that electric energy is converted into air internal energy. In the energy releasing process, the natural gas power generation module conducts combustion power generation through high-pressure air released by a gas storage hole and external natural gas and generates waste smoke, and the organic Rankine cycle module obtains waste heat from a compressor through an intercooler and an aftercooler, obtains first waste heat in the waste smoke through a heat recoverer and converts the first waste heat into additional electric energy. The absorption refrigeration module obtains second waste heat of the waste flue gas and converts residual heat energy into cold energy.

The utility model discloses a heat dissipation device for a fluorine pump system of a data center, which belongs to the field of heat dissipation of the data center and comprises a natural cooling pump cabinet and a cabinet door hinged to the open end of the natural cooling pump cabinet. The data center fluorine pump system heat dissipation device is simple in structure and convenient to use, vibration generated by a fluorine pump can be converted into elastic potential energy through the design of the crossed supporting rods, the air inlet sleeve, the mounting frame and the crossed supporting rods, and therefore the influence of the vibration of the fluorine pump on the surrounding environment and equipment is reduced; the kinetic energy is converted into internal energy to be consumed, vibration is further relieved, air can enter the natural cooling pump cabinet from the fixed sleeve through the design of the air inlet sleeve and is exhausted along an air outlet in the top, all-around cooling is provided for a fluorine pump, meanwhile, the air is accelerated when flowing through the sleeve through the design of the variable caliber of the air inlet sleeve, and the air is cooled. Therefore, the flow speed of air entering the natural cooling pump cabinet is increased, and the cooling efficiency is improved.

The application discloses a mold turning hoist and mold turning system for a reverse pouring type independent foundation mold, relates to the technical field of concrete prefabricated component production, and comprises a mold connecting assembly and a lifting lug seat. The mold connecting assembly comprises a connecting seat, a rotating shaft and a resistance plate which are sequentially connected. The resistance plate comprises a connecting surface and a blocking arc surface which is symmetrically arranged on both sides of the connecting surface. The lifting lug seat is integrally provided with a lifting hole, a movable groove and a limiting groove. The rotating shaft can rotate in the movable groove and freely move along the vertical direction. By adjusting the height of the rotating shaft, the center of gravity is positioned, the rotating shaft is ensured to be in the best turning position, the buffer damping structure of the resistance plate and the limiting groove is combined, kinetic energy is converted into internal energy through the friction of the contact surface, the rotating shaft is jacked up by the limiting groove, the whole foundation mold is lifted, the kinetic energy is rapidly attenuated, the swing range of the foundation mold during the turning process is controlled within a very small range, the safety hidden danger is eliminated, the swing times are reduced, the time for stopping swing is reduced, and the mold turning efficiency is improved.

The invention relates to the technical field of energy engineering, in particular to an advanced adiabatic compressed air energy storage parameter configuration method and device and electronic equipment, and the method comprises the steps: building an advanced adiabatic compressed air energy storage structure model; acquiring a target operation strategy of the structure model, analyzing an internal energy conversion relation and an internal thermal coupling relation of the structure model based on the target operation strategy, and establishing a compression and expansion coupling system model of the advanced adiabatic compressed air energy storage based on the internal energy conversion relation and the internal thermal coupling relation; and generating a configuration optimization model of the advanced adiabatic compressed air energy storage according to the compression and expansion coupling system model, and configuring parameters of the advanced adiabatic compressed air energy storage by using the configuration optimization model. Therefore, the problems that in the prior art, the structure is complex, a plurality of parts with nonlinear characteristics are covered, electricity-gas-heat multi-energy coupling is involved, and the design and configuration difficulty is high are solved.

The gas lift construction method comprises the steps that hydrops information of an oil and gas well to be constructed is obtained, the target gas pressure and the target gas internal energy, needed for discharging current hydrops, in an annulus are determined according to the hydrops information, and the annulus is located between a sleeve and an oil pipe; gas injection and pressure supplementation are conducted on the to-be-constructed oil and gas well through the annulus until the actual gas pressure in the annulus reaches the target gas pressure and the actual gas internal energy reaches the target gas internal energy, and gas injection and pressure supplementation of the current round are paused; and after the gas injection pressure supplement of the current round is paused, the liquid accumulation state is monitored in real time, and when the liquid column height of the accumulated liquid in the annulus reaches a preset liquid column height threshold value, liquid accumulation information is obtained again, and gas injection pressure supplement of the next round is started. The gas lift efficiency is improved, the gas lift duration is greatly shortened, and the gas injection amount is effectively reduced.

The invention relates to the field of cable insulation layer aging test, in particular to an electric vehicle cable insulation layer aging test method based on data analysis, which comprises the following steps: firstly, synchronously acquiring multi-dimensional data such as voltage, current, cable surface temperature and cooling system duty ratio based on a high-frequency sampling protocol; and then, the system constructs a virtual internal energy accumulation observation model by using the law of conservation of energy, and effectively eliminates a thermal hysteresis monitoring blind area caused by heat conduction of the insulating layer by calculating Joule thermal power input and an active heat dissipation correction term. Meanwhile, electric field auxiliary dissociation characteristics are constructed through the coupling voltage ratio and the heat accumulation degree, material activation energy is dynamically corrected through a power weight gating factor, and misinformation in the trickle charging stage is avoided. And finally, the virtual internal energy and the dynamic activation energy are mapped to the corrected Arrhenius equation, the insulation life loss is accurately calculated, and physical fidelity evaluation and real-time early warning of the insulation damage under the fast charge transient impact are realized.

The invention belongs to the technical field of multivariable control, and particularly relates to a trace synergist spraying film-forming closed-loop control method based on multi-source feedback, which comprises the following steps: acquiring an initial temperature and a microenvironment parameter before a matrix enters a spraying area in real time; constructing a microenvironment evaporation potential energy index according to the environment parameters; constructing interface phase change coupling impedance in combination with matrix thermal response parameters; calculating an impedance deviation value, and respectively determining an atomization air pressure correction value and a liquid medicine preheating temperature correction value based on the deviation value and the microenvironment evaporation potential energy index; and superposing the correction amount to a basic set value to drive the gas circuit and the liquid medicine preheating control unit. The environment self-adaptive double-variable compensation mechanism established by the invention can quantify the microscopic wetting state of a liquid film, dynamically adjust the kinetic energy and internal energy of liquid drops, effectively inhibit flash evaporation and sagging, and improve the effective adhesion rate of a synergist.

The utility model discloses a mounting structure of an external bonnet of a variable intake manifold of an engine, which comprises a fixed seat and a gland mounted at the upper end of the fixed seat, a vacuum nozzle is arranged inside the outer wall of the upper end of the gland, and a plurality of fastening bolts are arranged between the gland and the fixed seat to limit the position of the gland. An installation cavity is formed in the gland, a valve bonnet body is arranged in the installation cavity, through installation of the anti-vibration pad, strong vibration generated during operation of an engine can be effectively absorbed and buffered, and when vibration is transmitted to a bolt connection area, the anti-vibration pad can effectively absorb and buffer the engine through elastic deformation of the anti-vibration pad. Vibration energy is converted into internal energy to be consumed, so that the direct effect of vibration on the bolt is reduced, the risk of loosening of the bolt is reduced, meanwhile, the anti-vibration pad can buffer impact force caused by vibration, relative movement between parts is reduced, the abrasion degree is reduced, and the situation that the bolt is rusted due to rusting can be avoided.

The application provides a damping structure and a foldable device, and relates to the technical field of terminal devices. The foldable device comprises a first folding body, a second folding body and a rotating shaft mechanism. The rotating shaft mechanism comprises a first rotating part and a second rotating part. The first rotating part is fixed relative to the first folding body. The second rotating part is relatively rotatable with the first rotating part. The second rotating part is fixedly connected with the second folding body through the damping structure. According to the foldable device, the damping structure can quickly absorb the kinetic energy generated when the first folding body shakes under external force, and convert the kinetic energy into internal energy to dissipate, so that the first folding body can quickly stabilize.

An airfoil variable stiffness non-linear energy sink for mooring vibration reduction of a floating offshore wind turbine belongs to the field of mooring of floating offshore wind turbines. The non-linear material plate is bolted to the mooring line through a fastener; the non-linear material plate consists of two parts, a damping plate and a connecting rod, wherein the damping plate contains a plurality of particles inside, and a plurality of bolt holes are provided in the connecting rod part; one end of the fastener is bolted to the mooring line, and the other end is bolted to the non-linear material plate; it is in a relatively static state in the initial state; when the mooring line vibrates, the vibration of the mooring line is transmitted to the non-linear material plate through the fastener, causing the vibration of the non-linear material plate, converting the vibration energy of the mooring line into the vibration energy of the non-linear material plate, then causing the vibration of the particles in the non-linear material plate, and converting the vibration energy of the non-linear material plate into the kinetic energy of a plurality of particles, or a plurality of particles convert their own kinetic energy into internal energy through collisions, thereby reducing the vibration of the mooring line.

The invention relates to an energy-saving double-circulation cooler which comprises a shell, a main circulation mechanism arranged in the shell and an auxiliary circulation mechanism arranged in the shell, and the main circulation mechanism comprises a heat exchanger arranged in the shell, a cooling water tank communicated with the heat exchanger and a water pump arranged in the shell and used for conveying cooling water into the heat exchanger; the auxiliary circulation mechanism comprises a water containing cavity communicating with the heat exchanger, an impeller rotationally arranged in the water containing cavity, a first rotating shaft fixedly arranged on the impeller, an acceleration assembly fixedly arranged on the rotating shaft, a second rotating shaft fixedly arranged on the acceleration assembly, a plurality of blades fixedly arranged on the second rotating shaft and a pre-cooling cavity fixedly formed in the shell. And the pre-cooling water pipe is communicated with the water containing cavity and is fixedly arranged in the pre-cooling cavity. According to the energy-saving double-circulation cooler, through cooperative work of the main cooling mechanism and the auxiliary cooling mechanism, gradient utilization of internal energy is achieved, waste kinetic energy is converted into an effective cold source and electric power, and the overall energy consumption is reduced.

The invention belongs to the technical field of fluid mechanical engineering, and particularly relates to a centrifugal pump and turbine dual-mode shaft power calculation method based on mechanical energy and internal energy analysis. Performing three-dimensional flow field calculation based on the pump mode system mass flow; calculating the specific mechanical energy difference between the outlet boundary and the inlet boundary of the pump mode system; calculating the specific internal energy difference between the outlet boundary and the inlet boundary; calculating pump mode shaft power of the centrifugal pump; determining a turbine mode system of the centrifugal pump; three-dimensional flow field calculation is executed based on the turbine mode system mass flow; calculating the specific mechanical energy difference between the inlet boundary and the outlet boundary of the turbine mode system; calculating the specific internal energy difference between the outlet boundary and the inlet boundary; calculating the turbine mode shaft power of the centrifugal pump; through collaborative analysis of mechanical energy and internal energy, the structure and operation characteristics of the pump and turbine dual mode of the centrifugal pump are adapted, and the technical blank of quantitative shaft power calculation under the pump and turbine dual mode of the centrifugal pump is made up from the perspective of system energy dissipation and conservation.