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Method for detecting blow-by of hydrogen and oxygen in fuel cell stack quickly
ActiveCN101697005AAvoid safety hazardsQuality improvementFuel cells groupingCurrent/voltage measurementFuel cellsHydrogen
The invention relates to a method for detecting the blow-by of hydrogen and oxygen in a fuel cell stack quickly, which comprises the following steps: mounting the stack on a detection platform to connect the stack and a gas pipeline of a test platform and a circuit of a voltage routing inspection system; introducing hydrogen cavity detection gas into a hydrogen cavity of the stack, introducing oxygen cavity detection gas to an oxygen cavity, and enabling the stack to enter the generating state; and after voltages of cells in the stack are in an open circuit state of over 0.9 V, stopping introducing the oxygen cavity detection gas, continuing to introduce the hydrogen cavity detection gas to the hydrogen cavity, keeping pressure and recording the change of the cell voltages of the fuel cell stack under the state. Thus, a position in which the cell that the voltage of a single cell in the fuel cell stack drops quickly is positioned is a specific position of the blow-by of an oxy-hydrogen cavity. The method can detect the specific position of the blow-by of the hydrogen and oxygen in the fuel cell stack quickly, has the characteristics of novel and simple structure, quick test time, accurate test and the like, and belongs to the method for detecting the blow-by of the hydrogen and oxygen in the fuel cell stack which integrates economy and practicability into a whole.
Owner:SUNRISE POWER CO LTD
Method for preparing anode-support type yttrium oxide stable zirconium oxide electrolyte membrane
InactiveCN1641919AShort manufacturing cycleIdeal output power densityCell electrodesSolid electrolyte fuel cellsYttriumEthyl cellulose
The invention relates to a producing method of anode supporting yttrium oxide stable zirconium oxide electrolyte membrane. It relates to the producing method of electrolyte membrane used in solid oxygen compound fuel battery. It is produced following the steps: making multi-hole anode supporting; making YSZ electrolyte membrane on the surface of the supporting; forming ethyl cellulose terpilenol solution; adding YSZ powder into the solution and grinding for over two hours to form electrolyte stuff; spreading the stuff on the surface of supporting; sintering the dried anode supporting and the electrolyte membrane to gain anode supporting YSZ electrolyte membrane. The electrolyte membrane produced following the invention is equality and compact. Its thickness is between 10-30mucrometer. The cost of the device is low, and the operation is easy and fast. Meanwhile the ideal output power density of fuel cell is ensured.
Owner:HARBIN INST OF TECH
Small signal stability analysis method for wind storage isolated network system
ActiveCN106992514AFix stability issuesRealize smooth grid connectionSingle network parallel feeding arrangementsWind energy generationMathematical modelElectric power system
The invention belongs to the field of electric power system technology and especially relates to a small signal stability analysis method for a wind storage isolated network system. The method improves the operation reliability of the wind storage isolated network system. The method comprises the steps: step1, determining constitution of the wind storage isolated network system, step2, establishing a mathematical model of the wind storage isolated network system according to the constitution of the wind storage isolated network system, step3, establishing a wind storage isolated network system small signal linearization matrix equation according to the established mathematical model of the wind storage isolated network system, step4, calculating a characteristic constant of the small signal linearization matrix equation, and step5, judging the small signal stability of the wind storage isolated network system according to Lyapunov linear system stability criterion.
Owner:中电投东北新能源发展有限公司
Preparation method of large-scale energy-storage low-cost neutral flow battery
ActiveCN111354965AImprove cycle lifeImprove securityRegenerative fuel cellsElectrolytic agentIon-exchange membranes
The invention relates to the field of redox flow batteries applied to large-scale energy storage, in particular to a preparation method of a large-scale energy storage low-cost neutral flow battery, and aims to overcome the defects of high cost and high corrosivity in the field of large-scale energy storage flow batteries at present. An iron compound and an auxiliary neutral saline solution are used as a positive electrode electrolyte; a sulfur compound and an auxiliary neutral saline solution are used as a negative electrode electrolyte, and an ionized Nafion membrane, a PVDF membrane, a PTFEmembrane, a PP membrane, a PE membrane, a PEO membrane, an SPEEK membrane, an SPES membrane and a PBI membrane are used as ion exchange membranes of the flow battery. As the auxiliary electrolyte isan aqueous solution of neutral salt, the neutral flow battery system is low in corrosivity and long in cycle life. The prepared neutral flow battery system has the advantages of excellent battery performance, ultra-long cycle life, low cost, ultra-low maintenance cost and the like, and can be widely applied to the field of commercial large-scale energy storage flow batteries.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Quasi-solid tungsten trioxide electrochromic device and preparation method thereof
The invention discloses a quasi-solid tungsten trioxide electrochromic device and a preparation method thereof. The quasi-solid tungsten trioxide electrochromic device comprises a working electrode, an electrolyte layer, a counter electrode and a transparent conducting layer, wherein the working electrode is tungsten oxide, the electrolyte layer is a choline chloride ethylene glycol gel containinglithium salt, and the counter electrode is nano cerium oxide. A tungsten trioxide electrochromic film electrode and a cerium oxide counter electrode are prepared by adopting a spraying method, gel electrolyte is taken as pseudo ionic liquid, the gel electrolyte has the advantages of being low in cost, green and environment-friendly, highly transparent, not easy to leak, and high in ionic conductivity, so that the device prepared by the electrolyte has the characteristics of high response speed, large optical density difference and low cost.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Ionic POSS-containing block copolymer composite proton exchange membrane and preparation method thereof
The invention relates to an ionic composite proton exchange membrane containing POSS block copolymer and a preparation method thereof, which is characterized in that the the membrane comprises components of 70-99wt% polymer matrix and 1-30wt% ionic POSS-containing block copolymer; through phase separation method for making holes, dipping, multilayer scratching or dissolving and fusion mixing, thePOSS block copolymer is used as a function coating or blended phase to be composite with multiple kinds of commercial proton exchange membranes to prepare various kinds of ionic POSS-containing blockcopolymer composite proton exchange membranes with different micro structures. This method effectively solves the problem of size instability or low proton conductivity caused by the swelling of commercial proton exchange membranes at high temperature. The preparation method has the advantages of strong universality, good structure control, convenient operation and high efficiency.
Owner:RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN +1
A rapid detection method for fuel cell stack hydrogen-oxygen cross-gas
ActiveCN101697005BAvoid safety hazardsQuality improvementFuel cells groupingCurrent/voltage measurementFuel cellsHydrogen
The invention relates to a method for detecting the blow-by of hydrogen and oxygen in a fuel cell stack quickly, which comprises the following steps: mounting the stack on a detection platform to connect the stack and a gas pipeline of a test platform and a circuit of a voltage routing inspection system; introducing hydrogen cavity detection gas into a hydrogen cavity of the stack, introducing oxygen cavity detection gas to an oxygen cavity, and enabling the stack to enter the generating state; and after voltages of cells in the stack are in an open circuit state of over 0.9 V, stopping introducing the oxygen cavity detection gas, continuing to introduce the hydrogen cavity detection gas to the hydrogen cavity, keeping pressure and recording the change of the cell voltages of the fuel cell stack under the state. Thus, a position in which the cell that the voltage of a single cell in the fuel cell stack drops quickly is positioned is a specific position of the blow-by of an oxy-hydrogen cavity. The method can detect the specific position of the blow-by of the hydrogen and oxygen in the fuel cell stack quickly, has the characteristics of novel and simple structure, quick test time, accurate test and the like, and belongs to the method for detecting the blow-by of the hydrogen and oxygen in the fuel cell stack which integrates economy and practicability into a whole.
Owner:SUNRISE POWER CO LTD
Preparation of monatomic palladium catalyst and application of monatomic palladium catalyst in direct formic acid fuel cell
ActiveCN110690467AAvoid generatingImprove electrocatalytic activityCell electrodesFuel cellsPtru catalystFuel cells
The invention relates to a fuel cell technology, and aims to provide preparation of a monatomic palladium catalyst and application of the monatomic palladium catalyst in a direct formic acid fuel cell. The preparation method comprises the following steps of: preparing an o-phenylenediamine cyclodextrin inclusion compound from o-phenylenediamine and [beta]-cyclodextrin, adding the o-phenylenediamine cyclodextrin inclusion compound into a chloropalladic acid solution, and performing stirring to obtain a palladium coordinated o-phenylenediamine cyclodextrin inclusion compound solution; adding sodium chloride, carrying out liquid nitrogen flash freezing, and performing drying to obtain a precursor; carbonizing the precursor under the protection of nitrogen atmosphere, performing cooling, washing and drying to obtain the monatomic palladium catalyst. The technical route is simple, universality is achieved, and generation of impure phases can be avoided. The monatomic palladium catalyst hashigher electrocatalytic activity, and the cost can be effectively reduced. The co-catalytic application of the monatomic palladium catalyst and the cocatalyst (VO)SO4 provides a new thought for the design and performance improvement of the direct formic acid fuel cell, and is beneficial to the commercial development of the fuel cell.
Owner:ZHEJIANG UNIV
Underwater image transmission system based on visible light communication and quick likelihood blind detection algorithm thereof
PendingCN112737680AReduce complexityImprove communication securityReceiver specific arrangementsClose-range type systemsTransceiverVideo transmission
The invention discloses the technical field of communication, and particularly relates to an underwater image transmission system based on visible light communication. The visible light communication technology has the advantages of high-speed transmission and real-time application realization, such as high-speed video transmission, which is a requirement which cannot be met by other wireless communication modes; low link delay: the transmission speed of the light in the water is far higher than that of the sound wave, so that the visible light communication system link is not influenced by the link delay. In addition, compared with an acoustic method and a radio frequency method, the visible light communication technology has higher communication safety; and the optical underwater transceiver with relatively small volume and lower cost can be realized, and the economic benefit is higher, so that the commercial development of large-scale visible light communication in the future can be improved.
Owner:DALIAN POLYTECHNIC UNIVERSITY
High-performance environment-friendly lead-based perovskite solar cell and preparation method thereof
ActiveCN111312904ANo annealing requiredPassivated grain boundariesFinal product manufactureSolid-state devicesEthylene diamine tetra aceticEthylene diamine
The invention belongs to the field of solar cells, and discloses a high-performance environment-friendly lead-based perovskite solar cell and a preparation method thereof. According to the preparationmethod, a certain amount of a chelating agent disodium ethylene diamine tetraacetate or 2, 3-dimercaptosuccinic acid is introduced into a lead-based perovskite precursor solution so that the crystallinity and the crystal orientation of a lead-based perovskite thin film layer can be effectively optimized, the grain boundary of a perovskite thin film is passivated, and the energy conversion efficiency of the perovskite thin film is improved. Meanwhile, when the device is decomposed, the chelating agent can be combined with lead ions in time to form a stable and soluble complex, the complex canbe smoothly metabolized by a human body and discharged along with urine after being absorbed by the human body accidentally, and finally harm to the human body is remarkably reduced. Commercial development of the perovskite solar cell is facilitated, and particularly application of perovskite indoor photovoltaic as energy supply of the smart home terminal in the Internet of Things era is promoted.
Owner:SUZHOU UNIV
Composite proton exchange membrane for high-temp proton exchange membrane fuel cell and preparation method
InactiveCN100359738CImprove permeabilityImprove mechanical propertiesCell component detailsSolid electrolyte fuel cellsPhysical chemistryProton exchange membrane fuel cell
This invention relates to a compound proton exchange film of a high temperature proton exchange film fuel battery, characterizing that said film is a multiplayer proton exchange film composite by multiplayer multi-hole polymer intensified compound proton exchange films. The multi-hole polymer is a buck Teflon micro-hole film, which makes up of the multi-hole polymer enhanced compound proton exchange film together with the inorganic nm particles and solid poly-electrolyte fillers. The preparation method of the exchange film is: a micro- pore film is pre-processed and fastened filled by inorganic nm particles and solid poly electrolytes to be rolled to single layer multi-hole polymer intensified proton exchange film to be laminated and hot-pressed to form a multiplayer proton exchange film.
Owner:WUHAN UNIV OF TECH
Preparation method of alkaline redox flow battery system with high energy density and low cost
ActiveCN110534784AImprove solubilityAppropriate potentialCell electrodesRegenerative fuel cellsIon-exchange membranesIonization
The invention relates to the field of alkaline redox flow battery energy storage, in particular to a preparation method of an alkaline redox flow battery system with high energy density and low cost,and aims to solve the problems of low energy density, high cost and the like of an existing all-vanadium redox flow battery. Carbon felt is used as a positive electrode material of a flow battery, anda zinc sheet or a zinc plate is used as a negative electrode material of the flow battery. An alkaline aqueous solution of permanganate (such as KMnO4, NaMnO4 and the like) is used as a positive electrode electrolyte; an alkaline aqueous solution of strong base (such as KOH, NaOH and the like) is used as a negative electrolyte, and a perfluorosulfonic acid proton exchange membrane (such as Nafion117, Nafion212 and the like) subjected to ionization treatment is used as an ion exchange membrane of the flow battery to assemble the battery. Thus, an alkaline redox flow battery system having low cost and high energy density is obtained. The redox flow battery system researched and developed by the invention has the advantages of the high energy density, the low cost, the long cycle life and the like, and can be widely applied to the field of redox flow battery energy storage.
Owner:北京德泰储能科技有限公司
Preparation method of long-life neutral zinc-iron flow battery
PendingCN112103545AHigh capacity retentionSolve the problem of rapid capacity declineCell electrodesRegenerative fuel cellsElectrolytic agentElectrical battery
The invention relates to the field of redox neutral zinc-iron flow batteries, in particular to a preparation method of a long-life neutral zinc-iron flow battery. The method comprises the following steps: (1) preparing a positive electrode electrolyte: preparing a solution of halide and ferricyanide by using deionized water; (2) preparing a negative electrode electrolyte: preparing a series of halide solutions with different concentrations by using deionized water; (3) battery assembly: immersing an ion exchange membrane into an alkaline solution, and keeping the temperature at 50-100 DEG C for 1-3 hours to obtain a metal cation exchange membrane; and cutting and polishing a zinc sheet to serve as a negative electrode reaction active substance of the battery; and (4) assembling the key materials obtained in the steps (1), (2) and (3) into the neutral zinc-iron flow battery. The neutral zinc-iron flow battery using the modified electrolyte can stably circulate for more than 1340 circlesunder the current density of 30mA cm < 2 >, and the capacity retention ratio is more than 80% while the coulombic efficiency is maintained at 100%.
Owner:山东奥德储能科技有限公司
SO2 toxicity-resistant fuel cell oxygen-reduction nobel metal catalyst and preparation method and application thereof
The invention discloses a SO2 toxicity-resistant fuel cell oxygen-reduction nobel metal catalyst and preparation method and application thereof. In the SO2 toxicity-resistant fuel cell oxygen-reduction nobel metal catalyst, the absorption energy of a SO2 oxide on Pt is changed by a catalyst metal core modification surface layer Pt electron structure, the competitive absorption with active oxygen-containing particle is reduced, and active sites can be timely released. With the SO2 toxicity-resistant fuel cell oxygen-reduction nobel metal catalyst disclosed by the invention, the toxicity-resistant performance of the catalyst is improved on the basis that the oxygen-reduction activity is not reduced; and compared with commercial Pt / C, the catalyst prepared by the invention has the advantagesthat the SO2 toxicity-resistant performance is obviously improved, and the commercial development of a fuel cell is favorably promoted.
Owner:HARBIN INST OF TECH
A method for controlling the field focusing of a tower solar heliostat
ActiveCN105841369BReduce shockExtend your lifeSolar heating energySolar heat collector controllersHigh concentrationConcentration ratio
The invention relates to a method for controlling field focusing of a tower-type solar heliostat, and belongs to the technical field of solar thermal power generation applications. At present, there is no method for controlling the field focusing of tower solar heliostats with simple process and uniform distribution of light spots on the receiver. The feature of the present invention is: the steps of the control method are as follows: the receiver is divided into blocks, and the divided blocks correspond to the areas of the heliostat field one by one, and the heliostats in the area are respectively focused on the designated blocks, Make the light spots of each area in the heliostat field focus on the corresponding block on the receiver to disperse the energy reflected by the heliostat field, and dynamically adjust the distribution of the light spot in an orderly manner, thereby controlling each block on the receiver Concentration ratio, so that the temperature of the receiver is uniform. The technology of the invention is simple, the light spots on the receiver are evenly distributed, the impact of high light concentration ratio on the receiver can be reduced, and the reliability of the system and the service life of the receiver can be improved.
Owner:HUADIAN ELECTRIC POWER SCI INST CO LTD
A tower type solar power station receiver structure and receiving method
ActiveCN106225261BImprove stabilityImprove reliabilitySolar heating energySolar heat collectors with working fluidsHigh concentrationHeliostat
The invention relates to a tower solar power station receiver structure and a receiving method. The area of a mirror field of a tower solar power station is huge, massive heliostats exist, the energy density on a receiver is very high, and the situations of overheating burnout and excessive stress are likely to happen once heat cannot be brought away in time in an area with the maximum concentration ratio. The tower solar power station receiver structure comprises a converging tank and a plurality of heat collecting pipes. The two ends of each heat collecting pipe are connected to the converging tank. A cylinder structure is defined by the heat collecting pipes. A high-concentration-ratio area exists on the heat collecting pipes of the cylinder structure. The tower solar power station receiver structure is characterized in that the heat collecting pipes located in the high-concentration-ratio area are inwards-concave heat collecting pipes of an inwards-concaved structure. Large structure adjustment is made on the area with the maximum concentration ratio, the heat absorbing area of the area is increased, the radiation energy is scattered, and the concentration ratio on a pipeline is reduced; and temperature distribution of the whole receiver is more reasonable through radiation energy leaking into the other side of the receiver, and damage caused by the too high temperature or uneven stress is reduced.
Owner:HUADIAN ELECTRIC POWER SCI INST CO LTD
Perovskite thin film based on PbCl2 buffer layer and preparation method and application thereof
ActiveCN113193122AImprove charge transport efficiencyImprove energy conversion efficiencyFinal product manufactureSolid-state devicesEvaporation (deposition)Perovskite solar cell
The invention provides a perovskite thin film based on a lead chloride (PbCl2) interface buffer layer and a preparation method and application thereof, and belongs to the technical field of solar cells. According to the invention, a lead chloride (PbCl2) interface buffer layer is firstly prepared by adopting a vapor deposition method and is used for assisting in film formation of the FAPbI3 perovskite film, so that the problem that the photovoltaic performances of the perovskite film prepared by adopting an evaporation method and a solar cell prepared based on the film are relatively poor is solved, and the industrialization of the perovskite solar cell is facilitated. The energy conversion efficiency of the FAPbI3 perovskite solar cell prepared on the basis of the method can reach 15.6%.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Active output fluctuation stabilizing method based on operating working condition of wind driven generator
ActiveCN111336063ASmooth out active output fluctuationsDoes not cause speed instability problemsWind motor controlMachines/enginesThermodynamicsPower grid
The invention relates to the technical field of wind driven generators, in particular to an active output fluctuation stabilizing method based on an operating working condition of a wind driven generator. The invention provides the active output fluctuation stabilizing method based on the operating working condition of the wind driven generator. The method stabilizes power at high frequency deviation and at low frequency deviation, that is, the method comprises the steps of storing energy effectively by means of a rotating part of a fan to inhibit active output fluctuation at high frequency deviation and releasing energy to a power grid effectively by means of the rotating part of the fan to inhibit the active output fluctuation at low frequency deviation, so that a double-fed wind drivengenerator unit takes part in power stabilization actively to smooth the frequency fluctuation of the system, thereby reducing the starting number of times of primary frequency modulation of a synchronous generator.
Owner:NANTONG UNIVERSITY
Sandwich structure composite material and preparation method and application thereof
InactiveCN111952568AImprove conductivityImprove transmission performanceSecondary cellsCarbon nanotubesNitrogen doped carbon nanotubeSelf-assembly
The invention relates to a sandwich structure composite material as well as a preparation method and application thereof. The composite material comprises Nb2C and nitrogen-doped carbon nanotubes (N-CNTs), the Nb2C is in a two-dimensional organ shape, and the N-CNTs are clamped between Nb2C lamellas. The conductivity of Nb2C is improved. With the insertion of the N-CNT, the stacking between Nb2C lamellar structures is avoided, the ion transmission capacity of Nb2C is improved by the N-CNTs, and the electrochemical reaction area is increased. The preparation method comprises the following steps: etching Nb2AlC to obtain Nb2C; dispersing Nb2C into water to obtain an Nb2C colloidal solution; and mixing the NCNT solution and the Nb2C colloidal solution, and carrying out a self-assembly reaction to obtain the sandwich structure composite material. And the electrical property is excellent.
Owner:SHANDONG UNIV
Preparation of Single-atom Palladium Catalyst and Its Application in Direct Formic Acid Fuel Cell
ActiveCN110690467BAvoid generatingImprove electrocatalytic activityCell electrodesFuel cellsPtru catalystFuel cells
Owner:ZHEJIANG UNIV
A Method of User Response
ActiveCN110503333BConvenient electricity situationImprove electricity consumptionForecastingResourcesElectricity priceMarket place
The invention is a user demand response method considering electric energy storage and thermal energy storage in a market environment, and belongs to the demand response technology based on real-time electricity prices. This method takes into account the price elasticity of electricity loads, that is, the higher the real-time electricity price, the smaller the load, and the goal is to minimize the user's electricity consumption cost, and optimize the user's electricity consumption mode; the user's energy system includes electricity load, heat load and Electric energy storage, thermal energy storage, and an electric boiler capable of converting electric energy into heat energy, the present invention considers their respective characteristic constraints and establishes an objective function. The invention is an effective exploration of the commercial development of the demand response mode in the spot market environment, and is of great significance to my country's energy revolution.
Owner:GUANGDONG POWER GRID CO LTD +1
Method for preparing anode-support type yttrium oxide stable zirconium oxide electrolyte membrane
InactiveCN1279643CShort manufacturing cycleIdeal output power densityCell electrodesSolid electrolyte fuel cellsFuel cellsPhysical chemistry
The invention relates to a producing method of anode supporting yttrium oxide stable zirconium oxide electrolyte membrane. It relates to the producing method of electrolyte membrane used in solid oxygen compound fuel battery. It is produced following the steps: making multi-hole anode supporting; making YSZ electrolyte membrane on the surface of the supporting; forming ethyl cellulose terpilenol solution; adding YSZ powder into the solution and grinding for over two hours to form electrolyte stuff; spreading the stuff on the surface of supporting; sintering the dried anode supporting and the electrolyte membrane to gain anode supporting YSZ electrolyte membrane. The electrolyte membrane produced following the invention is equality and compact. Its thickness is between 10-30mucrometer. The cost of the device is low, and the operation is easy and fast. Meanwhile the ideal output power density of fuel cell is ensured.
Owner:HARBIN INST OF TECH
Preparation method and application of cathode interface layer of organic optoelectronic device based on conjugated polyelectrolyte
ActiveCN104821374BImprove solubilityEasy to move aroundFinal product manufactureSolid-state devicesConjugated PolyelectrolytesInterface layer
The invention discloses a preparation method of a cathode interface layer of an organic photoelectric device based on a conjugated polyelectrolyte, which comprises the following steps: (1) preparing anion conjugated polyelectrolyte and cationic conjugated polyelectrolyte solutions; Perform surface treatment to obtain a charged substrate; (3) immerse the charged substrate in a conjugated polyelectrolyte solution opposite to the charged charge, absorb a layer of conjugated polyelectrolyte on the charged substrate, wash and dry; (4) Soak the charged substrate in a conjugated polyelectrolyte solution that is electrically opposite to the polyelectrolyte solution described in step (3), absorb a layer of polyelectrolyte on the charged substrate, wash and dry; (5) repeat steps (3)~( 4), obtaining the cathode interface layer of the organic photoelectric device. The invention also discloses the application of the cathode interface layer of the organic photoelectric device. The preparation method of the invention is simple to operate, and the experimental conditions are easy to control, and the obtained cathode interface layer has efficient cathode interface modification ability.
Owner:SOUTH CHINA UNIV OF TECH
A small-disturbance stability analysis method for wind-storage isolated grid system
ActiveCN106992514BFix stability issuesRealize smooth grid connectionSingle network parallel feeding arrangementsWind energy generationMathematical modelElectric power system
The invention belongs to the field of electric power system technology and especially relates to a small signal stability analysis method for a wind storage isolated network system. The method improves the operation reliability of the wind storage isolated network system. The method comprises the steps: step1, determining constitution of the wind storage isolated network system, step2, establishing a mathematical model of the wind storage isolated network system according to the constitution of the wind storage isolated network system, step3, establishing a wind storage isolated network system small signal linearization matrix equation according to the established mathematical model of the wind storage isolated network system, step4, calculating a characteristic constant of the small signal linearization matrix equation, and step5, judging the small signal stability of the wind storage isolated network system according to Lyapunov linear system stability criterion.
Owner:中电投东北新能源发展有限公司
Method for separating and purifying wine-brewing microzyme from black tea fungus
InactiveCN100429302CExtensive nutrition and health functionsLow priceFungiMicroorganism based processesBiotechnologyYeast strain
The invention relates to the method used to purify the common mixed black tea fungus liquid to gain distillers yeast strain. Its features are that it includes the following steps: purifying and separating the family or market black tea fungus liquid; processing fungus seed identification as the microbial taxonomy for the many purified yeast strains; filtering by inclined plane fungus seed inoculating static cultivation black tea fungus; it uses microbiology technique to separate and purify the black tea fungus main distillers yeast strain from the traditional black tea fungus drink to culture pure sweet particular black tea fungus. This technology has the advantages of no hetero fungus pollution, easy storage, stable product quality, easy industrialization production and product commercialization.
Owner:ANHUI AGRICULTURAL UNIVERSITY
Low-temperature preparation method of zirconium-based ceramic electrolyte membrane for fuel cell
InactiveCN108281689ASolve the shortcomings of low sintering density and long sintering timeImprove qualityElectrolytesFuel cellsFuel cellsMicrowave
The invention provides a low-temperature preparation method of a zirconium-based ceramic electrolyte membrane for a fuel cell. The low-temperature preparation method comprises the following steps: preparing a zirconium source precursor, which is obtained by mixing raw materials according to the ratio, into slurry; pressing and molding the ceramic slurry into a pointed cone array shape; carrying out copper ion and zinc ion doping, and sintering through microwave plasmas; after sintering for 0.5 to 1h, obtaining the electrolyte membrane. According to the low-temperature preparation method provided by the invention, plasmas are generated through microwave ionized gas, and are gathered on a micro-tip to form a point discharge effect, so that the ceramic membrane is rapidly heated; the doped copper ions and zinc ions can be used for effectively lowering the sintering temperature; meanwhile, added borane gas is added and is cracked, and the surface is densified, so that the uniform and denseceramic electrolyte membrane is obtained at low temperature, and furthermore, the disadvantages of a traditional zirconium-based ceramic electrolyte membrane that the sintering density under a low-temperature condition is low and the sintering time is long are solved. Furthermore, the low-temperature preparation method has very important practical significance of reducing the sintering temperature and the sintering time of zirconium-based ceramic electrolyte and improving the density.
Owner:CHENDU NEW KELI CHEM SCI CO LTD
A tandem solar cell based on a nanocrystalline composite center and its preparation method
InactiveCN105679858BStable performanceEasy to operateFinal product manufacturePhotovoltaic energy generationHole transport layerSolvent
The invention discloses a laminated solar cell based on a nanocrystal composite center and a preparation method thereof. Specifically, the preparation method includes the following three steps: 1) preparation of the front sub-cell; 2) preparation of the recombination center; and 3) preparation of the rear sub-cell. The invention uses lead sulfide nanocrystals as the hole transport layer of the recombination center, which not only has the characteristics of simple operation of the solvent method, but also has the device stability that the traditional solvent method material lacks; the new recombination center and lead sulfide colloidal quantum dot solar cell The system is more compatible, and its efficiency is much higher than that of the reported lead sulfide quantum dot stack device; the temperature of the whole preparation process is controlled within 140 ° C, and it is all carried out in the air. The process is simple and does not require an inert gas atmosphere. The preparation method of the invention breaks through the existing technical bottleneck, and provides a certain guiding role for further improving the photoelectric conversion efficiency of the device and promoting its commercial development.
Owner:SUZHOU UNIV
Controllable short-term frequency supporting method for wind driven generator suitable for low-frequency disturbance
PendingCN111244974AImprove on-grid performancePromote commercial developmentPower oscillations reduction/preventionWind energy generationPhysicsElectric generator
The invention relates to the technical field of wind driven generator frequency control, in particular to a controllable short-term frequency supporting method for a wind driven generator suitable forlow-frequency disturbance. According to the method, droop control is added to fan rotor side control, and the active loss of a system is compensated by temporarily releasing the rotational kinetic energy stored in a fan; a self-defined droop parameter is calculated by considering the participation frequency modulation potential of the fan; rapid system frequency response is actively provided; thesystem frequency support control of a controllable wind turbine generator is realized under different fan operation conditions; that is to say, when the rotating speed of a fan rotor is high, rotating kinetic energy is fully released to compensate for active power loss and provide response time for a conventional generator set to participate in regulation, and when the rotating speed of the rotoris low, a proper amount of rotating kinetic energy is released to compensate for system active power loss, and the fan rotating speed instability problem and severe secondary frequency drop are not caused. A guarantee is provided for high-wind-power grid connection, and the use of an energy storage device for frequency modulation is reduced; and commercial development of the fan can be promoted.
Owner:NANTONG UNIVERSITY
Method for producing acid whey by using whey water
ActiveCN112056407AFast fermentationShorten the fermentation cycleLactobacillusWhey manufactureBacilliFermentation starter
The invention discloses a method for producing acid whey by using whey water. The method is characterized by comprising the following steps: acid whey fermentation strains are activated in a culture medium; then the activated acid whey fermentation strains are inoculated into sterilized whey water; closed fermentation is performed to quickly obtain the acid whey; the acid whey with all fermentation conditions controlled is utilized as a subculture fermentation agent, and thus, performing strain activation and inoculation, and then performing fermentation again are not needed. According to themethod, lactic acid bacteria screened from whey are selected and are easy to adapt to grow and propagate in the whey, so that the time for the whey to become sour is greatly shortened; fermentation isstable and industrial production is facilitated; selecting the whey water as a product obtained after a dairy fan or a dairy cake is convenient and fast, and lactobacillus fermentum and lactobacillusbulgaricus have a synergistic effect on fermentation of the whey.
Owner:YUNNAN AGRICULTURAL UNIVERSITY
Proton exchange membrane electrode, fuel cell, galvanic pile, and manufacturing method of cell
PendingCN110649279AReduce material costsReduce manufacturing costFuel cell heat exchangeFinal product manufactureElectrochemical responsePtru catalyst
The invention discloses a proton exchange membrane electrode, a fuel cell, a galvanic pile, and a manufacturing method of the cell. The fuel cell comprises a hydrogen flow field plate, an oxygen flowfield plate and a proton exchange membrane electrode between the hydrogen flow field plate and the oxygen flow field plate, the proton exchange membrane electrode comprises a first diffusion layer, afirst catalyst layer, a proton exchange membrane, a second catalyst layer and a second diffusion layer which are stacked in sequence, and further comprises two electric conduction and heat conductionthin film layers which are located on the outer sides of the two diffusion layers respectively, and are used for leading out current generated by an electrochemical reaction in a bypassing manner without passing through the hydrogen flow field plate and the oxygen flow field plate. Reaction current and reaction heat can be diffused to the periphery of a reactor from the middle of the reactor, thecurrent is conducted to two ends of the reactor through an out-of-reactor circuit, and the reaction heat can be dissipated through air or a liquid around the reactor, so that the flow field plates inthe galvanic pile do not need to have a conductive function, the temperature in the fuel cell galvanic pile is maintained, the normal operation of the galvanic pile is guaranteed, and the galvanic pile with high power, stable performances and high power-weight ratio can be realized.
Owner:陶霖密
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