31results about How to "Solve the low conversion efficiency" patented technology

The invention discloses a photovoltaic grid-connected converter, a photovoltaic power supply system and an electric appliance. The photovoltaic grid-connected converter comprises a boosting chopper, a by-pass switch and a conversion circuit, wherein the boosting chopper is connected with a photovoltaic array and used for performing boosting conversion on output voltage of the photovoltaic array, the by-pass switch is connected with the boosting chopper in parallel and used for bypassing the boosting chopper when the output voltage of the photovoltaic array exceeds a preset voltage threshold value, and the conversion circuit is connected with the output end of the boosting chopper and used for performing direct-current and alternating-current conversion on output currents of the boosting chopper. Through the photovoltaic grid-connected converter, the problem that in related technologies, the conversion efficiency of a photovoltaic grid-connected converter is low is solved.

The invention discloses an SCR conversion efficiency recovery method and device and a vehicle, and is used for improving the SCR conversion efficiency of a vehicle after-treatment system. The vehicle after-treatment system comprises an SCR device and a DPF; the vehicle after-treatment system pre-stores an SCR conversion efficiency pulse spectrum; the method comprises the steps that the first conversion efficiency of the SCR device under the current exhaust gas flow and exhaust gas temperature is obtained; according to the SCR conversion efficiency pulse spectrum, the first conversion efficiency threshold value and the first conversion efficiency in the SCR conversion efficiency pulse spectrum under the current waste gas flow and the current waste gas temperature are compared; and if the first conversion efficiency is lower than the first conversion efficiency threshold value, the DPF is controlled to execute active regeneration. According to the technical scheme, active regeneration is triggered in advance when the SCR conversion efficiency is reduced but no NOx exceeding 1.2 fault occurs, so that the problem of low SCR conversion efficiency can be solved, DPF overload blockage faults can be reduced, the labor cost can be saved, and the economic benefit can be improved.

The invention discloses a gas turbine power generation device acting through pulse detonation fuel gas viscous force. The gas turbine power generation device comprises a gas inlet channel, a gas compressor and the like. The gas inlet channel is located at the forefront end of a gas turbine, the gas compressor is connected with the gas inlet channel, and a gas storage chamber is arranged on the downstream portion of the gas compressor. An exhaust pipe of the gas compressor is connected with the gas storage chamber and a combustion chamber gas inlet channel. A combustion chamber gas inlet cone is arranged in the combustion chamber gas inlet channel, and a combustion chamber pneumatic valve is mounted on the combustion chamber gas inlet cone. A pulse detonation combustion chamber is connectedwith the combustion chamber gas inlet channel, a spark plug is arranged on the head of the pulse detonation combustion chamber, and a telsa turbine is arranged at an outlet of the pulse detonation combustion chamber. A gas collection cavity is arranged on the side of the telsa turbine. The exhaust pipe is connected with the gas collection cavity. The left end of a gas compressor transmission is connected with a gas compressor rotor, and the right end of the gas compressor transmission is connected with a turbine rotor. The left end of a generator transmission is connected with the turbine rotor, and the right end of the generator transmission is connected with a generator. According to the gas turbine power generation device, the problems happening after the pulse detonation combustion chamber replaces an isobaric combustion chamber in a ground gas turbine and other power generation power devices are solved.

A technology for improving a photoelectric conversion rate of a conductive substrate based on frosting processing and conductive glass thereof are disclosed. Light transmittance of front panel glass of a solar cell is low, which causes low solar cell conversion efficiency. By using the technology of the invention, the above problem can be solved. A technology scheme is characterized in that: a structure of the conductive substrate glass comprises: substrate glass and a transparent conductive film layer which is sputtered on an upper surface of the substrate glass; the upper surface, which is the surface of the substrate glass contacting with the transparent conductive film layer, is a frosting surface which is formed through the frosting processing. In the invention, the substrate glass is firstly performed the frosting processing so as to form the frosting surface and then the transparent conductive film layer is sputtered on the frosting surface. Through the frosting surface, an optical path of light in the glass can be increased; reflectivity of the substrate glass can be reduced so that the light transmittance can be raised and a problem of the low solar cell conversion efficiency can be solved.

The invention discloses a method for analyzing the conversion success degree of urban resource endowment and scientific and technological achievements. The method comprises the following steps: (1) deconstructing elements of urban resource endowment; (2) analyzing the influence factors of the to-be-converted scientific and technological achievements; and (3) calculating the matching degree betweenthe urban resource endowment and the to-be-converted scientific and technological achievement to obtain the conversion success degree. The method is based on a big data technology; various factors for converting scientific and technological achievements are fully considered; moreover, the data resource advantage of the Internet is effectively utilized, the feasibility of urban resource endowmentand scientific and technological achievement conversion is visually output, and a user can optimize relevant influence factors according to an analysis result, so that the success rate of urban resource endowment and scientific and technological achievement conversion is improved.

The invention provides an n type silicon solar cell and a preparation method therefor. The n type silicon solar cell comprises an n type silicon substrate, wherein a p type doped layer, a front surface passivating layer and an anti-reflection layer are manufactured on the front surface of the n type silicon substrate from the bottom up in sequence; the front surface passivating layer is a monox or silicon nitride film layer; a front surface electrode is manufactured by penetrating the anti-reflection layer and the front surface passivating layer; the front surface electrode is connected with the p type doped layer; an n+ doped layer is formed on the back surface of the n type silicon substrate through a doping manner; a back surface passivating layer is manufactured on the n+ doped layer; the back surface passivating layer comprises a film layer prepared from a ferroelectric film material or a doped ferroelectric film material; a full-back metal film is manufactured on the back surface passivating layer; and a back surface electrode of the cell is formed by the full-back metal film. According to the n type silicon solar cell, the ferroelectric film material is adopted as the main raw material of the back surface passivating layer of the cell, so that the open-circuit voltage, the short-circuit current and the fill factor of the cell can be well improved, and the conversion efficiency of the cell can be improved.

The invention discloses a graphene electric heating painting. The graphene electric heating painting comprises an electric heating painting body and a frame used for fixing the electric heating painting body. The electric heating painting body comprises a surface layer decorative painting, a heating element and a thermal insulation layer which are sequentially arrayed at intervals. An infrared reinforcing layer, an infrared absorbing layer or an infrared reflecting layer are further included. According to the graphene electric heating painting disclosed in the invention, forward direction electricity-heat radiation conversion efficiency is improved, heat losses are reduced, far infrared radiation efficiency is high, the energy transfer efficiency between the heating element and a heating painting decorative layer is improved, the efficiency for infrared radiation energy to be transferred to the electric heating painting decorative layer from the heating element is also improved, the human body temperature feeling at a long distance is increased, and human body far infrared physical therapy experience is improved; and moreover, the heating effect of the electric heating painting isenhanced, energy utilization efficiency is improved and energy saving and environmental protection are realized.

The invention discloses a method capable of improving rare-earth mineral conversion efficiency in rare-earth wet-process smelting. The method comprises the following steps: performing oxidization roasting on rear-earth concentrate to obtain rare-earth roasted concentrate, adding alkaline into the rare-earth roasted concentrate to uniformly mix, roasting, and washing and pickling the obtained roasted concentrate. According to the method disclosed by the invention, the rare-earth concentrate is roasted and then is added with alkaline to roast, so that surface reaction defects of concentrate particles can be effectively eliminated, reaction inside the concentrate particles also can be complete, alkaline conversion effect is improved, and the low conversion efficiency problem at present is solved; and meanwhile, the rear-earth wet-process metallurgical process formed by the method can directly add acid into a reaction tank once to leach rare earth, is optimized, and avoids the problems that the original process materials are transferred by many times, energy consumption is high and production efficiency is low.

The invention discloses a gene transformation method for summer black grapes. The method comprises the steps of material selection from tissue culture seedling leaves, leaf stalks and stem fragments, infection, co-culture, screening culture and rooting culture. Material selection is optimized, growth portions and growth time of explant leaves are specifically regulated, and the phenomenon that the working efficiency is low due to blindness of material selection is avoided; meanwhile, the portions, including grape leaf stalks and stem fragments, except the leaves, of the explants are selected, better operation can be performed by using the leaf stalks and the stem fragments, the gene transformation efficiency can be improved, and the transformation efficiency can reach 20% or above; the problem of pollution of agrobacterium and infectious microbes in an agrobacterium-mediated method is solved; the problem that the grape conversion efficiency is low is solved; the problem that grape transgene transgenosis, transgenic test and farm transplanting period is long is solved, and the period is shortened; the problems that the transgenic test workload is large and workloads are large are solved, the detection method is simplified, and the detection speed is increased.

The invention discloses a transceiver circuit for wireless charging and a wireless charging system, the circuit comprises a transmitting circuit (1) and a receiving circuit (2); wherein the transmitting circuit (1) comprises a first capacitor (C1) and a transmitting coil (L1); the receiving circuit (2) comprises a receiving coil (L2), a second capacitor (C2), a third capacitor (C3), a fourth capacitor (C4), a fifth capacitor (C5), a first diode (D1), a second diode (D2), and a third diode (D3). The transceiver circuit of the invention can effectively improve the conversion efficiency of the wireless charging circuit and the device by providing a magnifying rectifying voltage amplifying circuit and a rectifying diode with high mobility. The invention solves the problem of low conversion efficiency of the traditional wireless charging circuit.

The invention provides a MnO2-Co2O3-CeO2-SnO2 ammonium removal catalyst as well as a preparation method and application thereof. The MnO2-Co2O3-CeO2-SnO2 ammonium removal catalyst is composed of a carrier, an active component and a cocatalyst, wherein the active component and the cocatalyst are loaded on the carrier; the active component is MnO2; the cocatalyst is a Co2O3-CeO2-SnO2 compound; Co2O3, CeO2 and SnO2 are doped in MnO2. According to the composite ammonium removal catalyst, through the synergistic catalysis effect of the active components and the cocatalyst in the catalyst and the strong adsorption effect of the carrier on ammonium ions, other chemical reagents do not need to be added, auxiliary means such as photoelectricity do not need to be used, and ammonia nitrogen in wastewater can be efficiently converted into nitrogen only by utilizing dissolved oxygen in a water body.

The invention discloses a vibrator control method of a biomass gasification power generation system. The biomass gasification power generation system comprises a reactor, wherein the reactor comprisesa cracking chamber, a combustion chamber, a reduction chamber, a vibrator and a heat preservation shell. The system is characterized in that the vibrator in the reactor is controlled by monitoring the pressure and temperature parameters of the combustion chamber and reduction chamber and the property parameters of fed materials, running of the vibrator is controlled by means of a specific equation, and the internal pressure, temperature and material property parameters of the reactor are shown as Rratio=Pc/Pr*ed/m*(Tc-Tr), wherein Rratio represents a reaction completion degree indicating parameter of the reactor, Pc represents the pressure of the combustion chamber, Pr represents the pressure of the reduction chamber, e represents a natural constant, d represents an average particle sizeparameter of the materials, m represents a water content parameter of the materials, Tc represents the temperature of the combustion chamber, and Tr represents the temperature of the reduction chamber. When Tc is greater than or equal to 900 DEG C, the vibrator is controlled to carry out following actions according to Rratio: (1) when Rratio is greater than or equal to 20 and smaller than or equalto 80, the vibrator continuously vibrates for 30 seconds every 5 minutes; (2) when Rratio is smaller than 20 or greater than 80, the vibrator vibrates continuously for 3 minutes every 5 minutes.

The invention discloses a high-strength composite bottom enamel non-stick pan, and relates to the technical field of high-strength enamel non-stick pans, the high-strength composite bottom enamel non-stick pan comprises a composite enamel non-stick pan body, the composite enamel non-stick pan body comprises a composite pan bottom, and a gas stove support lap joint device is arranged on the outer surface of the bottom of the composite pan bottom; a side waste heat recovery layer is arranged on the outer surface of the periphery of the bottom of the composite pot bottom. The honeycomb heat absorption layer is used for transmitting heat collected by the side waste heat recovery layer, the heat is transmitted through cooperation with the hot air flow guide groove, internal heat is diffused, the heat is transmitted through cooperation with the composite enamel layer, the heat persistence is improved, and the characteristics that the surrounding temperature is transmitted, and the heat persistence is improved are achieved; the problems of high heat conductivity, high heat consumption speed and low heat conversion performance of the pot bottom are solved, and the effects of transmitting the surrounding temperature and increasing the heat persistence are achieved.