35 results about "Entropy production" patented technology

The invention provides a multi-principal high-entropy alloy and a preparation method thereof, wherein the composition of the multi-principal high-entropy alloy is Fe a co b Ni c Al d Cu e , where a, b, c, d and e represent the molar ratios of each element respectively, and 0.9≤a≤1.1, 0.9≤b≤1.1, 0.9≤c≤1.1, 0.9≤d≤1.1, 0.9≤e≤ 2.0. The multi-principal element high-entropy alloy has good plasticity, can obtain higher strength at the same time, and has excellent mechanical properties.

The invention relates to a real-time monitoring method and a monitoring system for thermal efficiency indices of a generator set. The monitoring system comprises a data terminal, a computer, a data acquisition instrument and 1-20 IPM (Intelligent Power Module) acquisition boards, wherein the computer is connected with the IPM acquisition boards through the data acquisition instrument, and the IPM acquisition boards are connected through data cables. Detection steps include: (1) original test data is acquired; (2) the accuracy of the acquired original test data is judged by an entropy production module; (3) a differential flow pressure signal in step (1) is converted into actual test condensed water flow Dns0, and is input into a thermal efficiency index module of the generator set; and (4) the thermal efficiency indices of the generator set are computed by the thermal efficiency index module of the generator set. On the basis of a data acquisition system, the thermal efficiency indices of the generator set are monitored in real time, a test is controlled, faults are checked, blindness and deviation in fault checking are reduced, the test cost is reduced, and the evaluating and monitoring accuracy and the reliability of a testing result are improved.

The invention discloses a hydrogen turbine expansion device. The hydrogen turbine expansion device comprises a rack; a spindle capable of freely and radially rotating in the rack is arranged on the rack; a turbine is arranged at one end of the spindle; an axle of the turbine and the spindle are coaxially and fixedly connected; and labyrinth sealing sleeves for sealing a gap between the spindle andthe turbine are arranged on the spindle. The hydrogen turbine expansion device has the advantages that the cooling effect on circulating hydrogen is good, the cooling capacity demand of sufficient depth can be provided for hydrogen liquefaction, the flash evaporation phenomenon can be effectively avoided, entropy production can also be lowered, meanwhile, stable refrigeration in a liquid hydrogentemperature zone can be achieved in the civil field, turbine expansion related to 20 K liquid hydrogen temperature is achieved, and the hydrogen liquefaction efficiency is greatly improved.

The invention discloses horizontal-type high temperature heat-storage heat supplying equipment and a using method thereof. The horizontal-type high temperature heat-storage heat supplying equipment comprises a heat storage tank filled with a heat storage medium; the bottom of the heat storage tank is provided with an electric heating device for heating the heat storage medium, and the electric heating device is connected with an electricity supplying system; a heat exchanging device with an adjustable heat exchanging area is horizontally arranged on the upper part of the heat storage tank in apenetrating mode, and the heat exchanging device is composed of a heat releasing medium inlet section, a heat exchanging section and a heat releasing medium outlet section which are connected in series; and the heat exchanging section is composed of a plurality of heat exchangers which are connected in series and / or in parallel, all the heat exchangers are arranged from bottom to top, the heat exchanger at the very bottom is connected with the heat releasing medium inlet section, and a valve group is mounted on the heat exchanging section and used for controlling a heat exchanger to work or controlling the multiple heat exchangers to work simultaneously. According to the horizontal-type high temperature heat-storage heat supplying equipment and the using method thereof, heat is stored byutilizing off-peak electricity during night or abandoned wind and light 'waste electricity', and steam is produced in daytime, so that entropy production is reduced, the energy utilization efficiencyis enhanced, the electricity transmission capacity of a power grid is increased, and the cost of steam production is reduced substantially.

The invention discloses an improved lime kiln exhaust gas waste heat power generation system and a power generation system of the improved lime kiln exhaust gas waste heat power generation system. The power generation system comprises a chimney, exhaust gas valves, a waste heat boiler, a draught fan, a steam pocket, a steam turbine, a power generator, a condenser, a cooling tower, a condensate pump, an oxygen remover, a boiler water feeding pump, an oxygen removing water returning pipe and a redundant steam inlet pipe. A superheater, an evaporator and an economizer are sequentially arranged inside the waste heat boiler from top to bottom. The oxygen removing water returning pipe is connected with a water outlet of the boiler water feeding pump. The redundant steam inlet pipe is connected with a steam inlet of the superheater. According to the power generation method, redundant saturated steam in a steam pipe net is supplemented into the superheater inside the waste heat boiler through the redundant steam feeding pipe, the flow of superheated steam entering the steam turbine is increased, and the generated power amount is increased. According to the power generation method, a dual-pressure system can be further used, the heat transmission temperature difference is reduced, the entropy production is reduced, and the generated power amount is increased.

The invention provides a thermal performance evaluation system and method for a vertical steam generator. The thermal performance evaluation system comprises a thermal hydraulic modeling module, a detection module and a calculation and analysis module, wherein the thermal hydraulic modeling module is used for dividing a plurality of different areas according to the tube side and housing side structures of the steam generator and the single-phase or double-phase characteristics of fluid flow so as to establish corresponding entropy production calculation models; the detection module is used fordetecting temperature, pressure and flow signals corresponding to the tube side and the housing side in the operation process of the steam generator; and the calculation and analysis module is used for calling the corresponding entropy production calculation models according to the processed temperature, pressure and flow signals, calculating corresponding entropy productions according to the tube side and the housing side, and calculating the total entropy production of a heat exchange system of the steam generator so as to carry out overall evaluation on the thermal performance of the steamgenerator. According to the thermal performance evaluation system and method, the irreversible entropy productions of the tube side and the housing side are considered at the same time, all the areasof the steam generator are covered, and the whole heat exchange process of the steam generator is completely fed back; and valuable reference is provided for the design and thermodynamic analysis ofthe steam generator.

The invention relates to a series of devices with the upward water flow function under the situation that conventional energy consumption does not exist, in particular to a simple channel device achieving spontaneous lighting. The problem that entropy production is irreversible in the energy circulation process is mainly solved, and in other words, negentropy is achieved. The potential energy of water is increased and changed into water flow kinetic energy, the water flow kinetic energy promotes a water turbine to generate power, and electric energy is output to lighting lamps to emit light for lighting after passing a control system and an energy storage system. The device comprises a device body with the upward water flow function, a downward water flow channel, a water turbine generator, an electric control system, the lighting lamps, and an anti-seepage and anti-evaporation closed system. By means of the whole system, the potential energy of the water can be increased under the situation that conventional energy is not consumed, the conversion between the potential energy and the kinetic energy, conversion between the kinetic energy and the electric energy and conversion between the electric energy and visible radiation can be achieved, the light spontaneous lighting is achieved, other energy is not additionally consumed, negentropy is achieved on the basis of the thermodynamics entropy production aspect, and the frequent happening frequency of the earth natural disasters can be finally reduced through the negentropy path.

The invention discloses a method for generating electricity by means of low temperature exhaust heat of a power plant and relates to an unconventional electricity generating method. The problems of excessively large exhaust heat discharge and environment pollution caused by heat of a thermal power plant or a nuclear power plant are mainly solved, and the waste heat is converted to electric energy is achieved through exhaust heat electricity generation. Theoretically, the situation of nonreversible entropy production during energy cycle is solved, that is, the entropy production direction is changed, and negentropy is achieved. Water potential energy is increased through equipment with the upward flowing function; the potential energy is converted to kinetic energy through water fall, and a water turbine is driven to generate electricity; meanwhile, the upward-flowing equipment absorbs a large amount of heat, including low temperature heat, during upward flowing; rapid upward flowing of water can be achieved through a certain structure, and finally energy cycle is achieved. The electricity is generated in the process and supplied to people, a beneficial energy cycle of the nature can be achieved, that is, negentropy is achieved on the basis of thermodynamics entropy production, and the frequency of natural disasters on the earth can be reduced finally.

The invention discloses an absorption transcritical carbon dioxide two-stage compression refrigerating system, and aims to provide a refrigerating system which adopts CO2 cooling heat and CO2 expansion work to jointly drive an absorption refrigeration cycle to cool an interstage cooler so that the running cost and the initial investment cost of the system can be reduced. The absorption transcritical carbon dioxide two-stage compression refrigerating system comprises a two-stage compression refrigeration cycle and the absorption type auxiliary refrigeration cycle, a working medium of the two-stage compression refrigeration cycle is carbon dioxide, the two-stage compression refrigeration cycle comprises an expansion machine, and the expansion machine is arranged in a refrigerating medium inlet of an evaporator in the two-stage compression refrigeration cycle; and the auxiliary refrigerating cycle is used for reducing the suction temperature at an air suction port of a high-pressure stagecompressor in the two-stage compression refrigeration cycle. According to the system, the CO2 cooling heat and CO2 expansion work are utilized, the absorption type auxiliary refrigeration cycle is organically coupled to the steam compression main refrigeration cycle, the entropy production of the whole CO2 transcritical two-stage compression refrigerating system is smaller than that of an ordinary CO2 refrigerating system, and the thermodynamic process is more complete and is closer to a reverse carnot cycle.

The invention relates to a series of equipment with a water upflowing function without conventional energy consumption, in particular to cellulose-acetate-made equipment with a water upflowing function. The problem that entropy production is irreversible in the energy cycle process is solved, namely negative entropy is realized, water potential energy is increased, and energy cycle is achieved. The equipment comprises an immersed body (1), a pipeline shell supporting body (2), pipeline inner capillary channels (3) and a pipeline water outlet body (4); the pipeline inner capillary channels (3) are made of a hydrophilic material cellulose acetate, wherein hydrogen bonds are easy to form between cellulose acetate and H2O, and the pipeline water outlet body (4) is located on the upper middle or upper portion of a system. The water upflowing function can be achieved, water potential energy is increased without conventional energy consumption, beneficial energy cycle in the nature is realized, namely negative entropy is realized on the basis of the thermodynamics entropy production direction, and finally frequent occurrence of natural disasters on the earth is reduced.

An efficient multistage throttling LNG device comprises a natural gas inlet pipe, an LNG storage tank, a refrigerant compressor, refrigerant separation tanks and a cold cabinet. The efficient multistage throttling LNG device is characterized in that a main heat exchanger and an auxiliary heat exchanger are arranged in the cold cabinet, the natural gas inlet pipe sequentially passes through the main heat exchanger and the auxiliary heat exchanger and then is connected with a feed inlet of the LNG storage tank, a fourth throttling valve is arranged between the auxiliary heat exchanger and the LNG storage tank, and the number of the refrigerant separation tanks is five. Cooling capacity needed by supply is achieved in a segmented mode, entropy production of the liquidation process is minimized, and efficiency approximates step-type circulation. The problems that an existing LNG device is low in utilization rate of refrigeration cycle cooling capacity, high in entropy loss of a compressor, complex in structure and the like are solved fundamentally.

The invention relates to a propeller hub cap fin optimization design method based on entropy production analysis, and belongs to the technical field of propeller hub cap fins. The method comprises the following steps that: the working condition that a propeller needs to be subjected to optimization design is determined, determined basic parameters are mainly the advancing speed coefficient J and the propeller diameter D of the propeller; a hub cap fin is designed by using the propeller, and a constraint range for the blade diameter d of the hub cap fin and the blade mounting angle alpha of the hub cap fin are given; three-dimensional modeling is separately carried out on the propeller and the propeller with the hub cap fin selected in the parameter constraint range; an obtained propeller and a propeller three-dimensional model with the hub cap fin in the parameter constraint range are imported into a fluid dynamics calculation model for simulation calculation; entropy production analysis is performed, whether a design target is reached or not is determined according to an optimization target value of entropy production; if the design target is not reached, design parameters are adjusted; and the process optimization is repeated until the design target is achieved. With the method adopted, the technical blank of a hub cap fin optimization design method is filled from the perspective of entropy production.

The invention discloses an organic Rankine cycle centripetal turbine flow loss diagnosis method based on an entropy production theory and an Omega technology. The method comprises the following steps: firstly, carrying out one-dimensional design on basic parameters of the centripetal turbine according to circulating operation parameters and working media; secondly, establishing a three-dimensional model of the turbine, completing grid division, and then determining the reasonable grid number through grid independence verification; then, carrying out numerical simulation on an internal flow field of the centripetal turbine according to design conditions; on the basis, obtaining distribution of local entropy production and integral entropy production through the entropy production theory, and determining the high-loss area of the turbine; and finally, utilizing the Omega technology to identify a vortex structure in the turbine, comparing the vortex structure with entropy production distribution, and determining a main vortex structure generating flow loss. The flow loss in the turbine and the correlation between the flow loss and the vortex structure are analyzed through the entropy generation theory and the Omega technology, accurate diagnosis of the flow loss of the centripetal turbine is achieved, and theoretical guidance is provided for turbine structure improvement and efficiency improvement.

The invention discloses a binary network module identification method and system based on entropy production, and a storage medium. The method comprises the following steps: a network conversion step:converting a binary network into a single-type node probability network only containing a type of nodes according to a probability relationship between two types of nodes in the binary network; a single-type node clustering step: calculating the information entropy of each relationship edge in the single-type node probability network, and performing clustering on the nodes in the single-type nodeprobability network according to the principle of information entropy production to obtain a single-type node initial cluster only containing a type of nodes; and a step of adding another type of nodes and a relationship edge: adding the other type of nodes and the relationship edge for expressing the connection relationship between the two types of nodes to the single-type node initial cluster according to the binary network relationship to obtain a final module. The binary network module identification method disclosed by the invention are simple and feasible, can be operated without usingadditional parameters, moreover, is relatively high in module identification rate and has an important reference value for conducting research on complex networks and biological information networks.

The invention relates to a hydraulic mechanical property analysis method based on numerical calculation, and belongs to the technical field of hydraulic machinery. Establishing a model according to the actual hydraulic machinery picture, dividing grids, determining boundary conditions, and performing numerical simulation to obtain a simulation result; adopting Tecplot software to obtain a speed cloud picture and a pressure cloud picture of the most basic physical quantity related to the speed and the pressure according to the obtained simulation result; obtaining a cavitation volume fraction contour cloud picture, and predicting and analyzing the cause of the cavitation part; obtaining an isoline cloud picture of the vortex structure, and predicting and analyzing reasons of the vortex generation region; and obtaining an entropy production cloud picture, and predicting and analyzing reasons of an area with relatively large hydraulic loss. The method has great significance in improving the efficiency of hydraulic machinery, reducing cavitation and improving the stability of a unit in actual engineering.

The invention discloses spontaneous illumination equipment and relates to a series of devices with the function of upward flowing under the condition that conventional energy consumption is absent. The situation of irreversible entropy production during energy cycle is mainly avoided, that is, negentropy is achieved, water potential energy is increased, the potential energy is converted into water flowing energy which then drives a water turbine to generate electricity, and electric energy is output after passing through a control system and an energy storing system and supplied to an illumination lamp for light emitting and illumination. The equipment comprises a device with the upward flowing function, a downward-flowing drain pipeline, a hydro-generator, an electrical control system, the illumination lamp and a water seepage and evaporation preventing closed system. The water potential energy of the whole system can be increased without conventional energy consumption, conversion from the potential energy to kinetic energy, conversion from the kinetic energy to the electric energy and conversion from the electric energy to visible radiation are achieved, spontaneous illumination is achieved, no extra energy source is consumed, that is, negentropy is achieved on the basis of thermodynamics entropy production, and the frequency of natural disasters on the earth can be reduced finally through the negentropy path.

A detector for detecting fluid flow irreversibility is disclosed herein. The detector uses a spatial velocity field to determine the entropy production distribution of the flow, and generates a loss coefficient distribution on the basis the determined entropy distribution.

The invention belongs to the field of heat exchange equipment, and discloses a flow control method for heating a heated fluid in stages by adopting a heat exchange system. The heat exchange system comprises a pre-heater, an evaporator and a super-heater; the pre-heater is connected with the evaporator and the super-heater in sequence; the pre-heater is used for heating a sub-cooled fluid to a saturated fluid; the evaporator is used for heating the saturated fluid to a saturated gas; the super-heater is used for heating the saturated gas to a superheated gas. According to the flow control method for heating the heated fluid in stages by adopting the heat exchange system, the terminal temperature difference between an outlet and an inlet of each evaporator is reduced by controlling the flow of the heating fluid in the heat exchange system, so that the entropy production produced in a heat exchange process can be reduced; the energy utilization rate of the system is improved.

The invention discloses a stage refrigerating cycle liquefaction process, which comprises the propane cycle process, the ethylene cycle process and methane cycle process. The stage refrigerating cycle liquefaction process has low energy consumption; because a nine-stage liquefaction flow is adopted, the refrigeration temperature in each stage approaches a cooling curve of a feed gas, entropy production is decreased, and the energy consumption approaches the theoretical thermodynamic efficiency upper limit; a refrigerant is a pure substance, a proportioning problem is avoided, and the operation is stable; in a cycle, a single refrigerant is adopted and easily keeps the given temperature in the cooling process, and because the components of a cycling medium are always same, a device can quickly start and stop, and the operation is stable; and a technology is mature and the surging of a compressor is reduced; and because the compressor always intakes gas with constant molecular weight, the surging danger of the compressor is reduced.

The invention relates to a series of equipment with a water upflowing function without conventional energy consumption, in particular to calcium-sulfate-made equipment with a water upflowing function. The problem that entropy production is irreversible in the energy cycle process is solved, namely negative entropy is realized, water potential energy is increased, and energy cycle is achieved. The equipment comprises an immersed body (1), a pipeline shell supporting body (2), pipeline inner capillary channels (3) and a pipeline water outlet body (4); the pipeline inner capillary channels (3) are made of a hydrophilic material polyvinyl alcohol, wherein hydrogen bonds are easy to form between polyvinyl alcohol and H2O, and the pipeline water outlet body (4) is located on the upper middle or upper portion of a system. The water upflowing function can be achieved, water potential energy is increased without conventional energy consumption, beneficial energy cycle in the nature is realized, namely negative entropy is realized on the basis of the thermodynamics entropy production direction, and finally frequent occurrence of natural disasters on the earth is reduced.

The invention discloses a device of a longitudinal fiber material structure with a water up-flow function and relates to a series of devices with the water up-flow function without conventional energy consumption. The situation that entropy production is inreversible in the energy circulation process is solved, that is, negentropy is achieved, the potential energy of water is increased, and energy circulation is achieved. The device comprises a water soaking body (1), a pipeline shell supporting body (2), pipeline inner capillary pipelines (3) and a pipeline water outlet body (4), wherein the pipeline inner capillary pipelines (3) are made from a hydrophilic molecular material which can easily form a hydrogen bond together with H2O, and the pipeline water outlet body (4) is located at the upper middle portion or the upper portion of the system. By means of the device, the water up-flow function can be achieved, the potential energy of water can be increased without conventional energy consumption, advantageous energy circulation in nature is achieved, negentropy is achieved on the basis of the thermodynamics entropy production direction, and finally the global natural disaster frequency is decreased.

The invention discloses a hydraulic turbine design method based on axial surface speed and entropy increase analysis and a designed hydraulic turbine. The design method comprises the steps that the inlet diameter and the outlet diameter of a flow channel are determined according to given parameters, the main size of an impeller is preliminarily drawn, and an impeller axial surface projection drawing is drawn; determining a middle line of a flow channel, and then drawing a multi-segment axial surface overflowing section in the flow channel; the axial surface overflowing section speed of each section of flow channel is calculated; the runner is corrected according to the change condition of the speed; the entropy production of each section of flow channel is calculated; an entropy increase area is judged according to entropy production of each section of flow channel, and the flow channel of the entropy increase area is corrected to reduce hydraulic loss; the optimized impeller structure parameters are kept unchanged, the area ratio parameters are adjusted by adjusting the guide vane outlet axial surface width, and the hydraulic turbine efficiency is further optimized; and finally, obtaining each parameter of the optimized hydraulic turbine. The hydraulic turbine is small in hydraulic loss.