176results about How to "Improve power utilization efficiency" patented technology

The invention relates to a hydraulic bidirectional pumping device which comprises a prime motor, a hydraulic oil pump, a hydraulic oil tank, a control valve, a double-action hydraulic cylinder and plunger pumps. The prime motor drives the hydraulic oil pump. The hydraulic bidirectional pumping device utilizes the double-action hydraulic cylinder to drive the plunger pumps on both sides; the cylinder number is increased; stroke times are reduced; the service lives of easily damaged parts are prolonged; the coverage range of flow is effectively enlarged; suction efficiency of fracturing fluid is effectively improved; complexity of the integral structure is reduced; cost of manufacturing, maintenance and the like is reduced; the requirements on a lubricating system are lowered; the double-action hydraulic cylinder reciprocates to do work, so that working efficiency is improved.

The invention relates to a rechargeable metal-air redox flow battery compatible with electrochemical preparation. When the battery is charged, electric energy input makes metal ions in the electrolyte flowing through a negative electrode reduced and deposited into metal to prepare for discharge, and the electric energy also makes reductive raw materials in the electrolyte flowing through a positive electrode oxidized into a product required to be synthesized. When the battery is discharged, the positive electrode is introduced with air or oxygen, the air or the oxygen is reduced on the electrode, and the positive electrode and a deposition redox flow metal negative electrode form the metal-air redox flow battery to output electric energy. In each charge and discharge cycle, the accumulation and discharge of the metal-air redox flow battery are carried out, and simultaneously electrooxidation chemical production is carried out so as to achieve the effect that one portion of electric energy is consumed and two functions are realized. The redox flow battery combines two functions of rechargeable metal-air accumulation and electrochemical preparation, realizes the combination of electrosynthesis, a deposition redox flow battery and a rechargeable metal-air battery, achieves the effects of energy conservation and high efficiency, improves the utilization rate of the electric energy and has good application prospect.

The present invention discloses a constant current source which consists of a voltage stabilizer, a drive element, a constant feedback unit and a load adaptive feedback unit. The constant feedback unit controls the constant current source to provide constant current for the load, the load adaptive feedback unit controls the output voltage of constant current source to change as the change of load, and thereby realizing the adaptivity of load, enhancing the flexibility of the constant current source and the electricity utilizing efficiency, and reducing the complexity of the thermal design for the system.

The invention discloses a multifunctional household electric heating furnace. The multifunctional household electric heating furnace comprises a shell , wherein a heating area is arranged on the uppersurface of the shell; the electric heating furnace further comprises a heat dissipation protection layer, a heating assembly and a heat insulation reflecting plate; the heating assembly is arranged below the heating area, and the heating assembly is provided with at least one layer of heating unit, the heating assembly is used for generating the heat required by heating a kettle; the heat dissipation protecting layer is arranged between the heating area and the heating assembly, the heat dissipation protection layer is used for absorbing and transferring heat to the heating area, the heat insulation reflecting plate is arranged at the bottom side of the heating assembly, and the heat insulation reflecting plate is used for isolating and reflecting heat to the heating area. According to the technical scheme, the heating rate and the electric energy utilization efficiency of the electric heating furnace are improved, the heating temperature of the electric heating furnace is improved, meanwhile, the cooling time of the furnace surface is reduced, and the use experience of a user is optimized.

The invention discloses a photovoltaic solar protection device with a fresh air ventilation function. The photovoltaic solar protection device with the fresh air ventilation function comprises a photovoltaic sun shield, a fresh air ventilation device and control switches, wherein the photovoltaic sun shield comprises a photovoltaic cell panel and a heat-insulated waterproof case; the fresh air ventilation device is provided with an upper air flue and a lower air flue, wherein a pyroelectricity module formed by a pyroelectricity chip and heat pipe radiators at the upper end face and the lower end face is arranged in the middle of a clapboard separating the upper air flue and the lower air flue, and the upper air flue and the lower air flue are internally provided with blowers; the photovoltaic cell panel is connected with the pyroelectricity chip and the control switches by leads, and the switch of working conditions of the winter and the summer is achieved through the switch of the control switches. According to the photovoltaic solar protection device disclosed by the invention, the photovoltaic in-situ power generation and utilization are achieved while the integration of a fresh air unit function and a sunshading function, the recycle of waste heat and cool air all year round is achieved, the advantages of photoelectric and photo-thermal comprehensive utilization, high system efficiency and compact device structure are provided, and the popularization and utilization values are favorable.

The invention provides a method for intelligent type constant temperature control suitable for a cold/warm air conditioning system. The method mainly comprises the steps that according to indoor temperature, outdoor temperature, set temperature and sunlight intensity, a thermal load estimated value needing to be subtracted from or added to the value of the air conditioning system is calculated, required cold/warm room power corresponding to the thermal load estimated value is calculated as well, operation of the air conditioning system is adjusted according to the thermal load estimated value, so that the required cold/warm room power is met, the difference between actual cold/warm room power and the required cold/warm room power is then measured, operation of the air conditioning system is adjusted repeatedly, and the requirement for constant temperature control is met. Thus, the power use efficiency of the air conditioning system is improved and the problems that burdens caused by repeated starting operation of an existing air conditioning system are brought to a power system, and efficiency is poor are solved.

The invention discloses a power grid control method and system with various load devices. The control method comprises the steps that power grid information of a power grid is periodically collected by an information collection device, stamped with a timestamp and packaged as a power grid event, and electricity storage information of energy storage equipment is periodically collected by the information collection device, stamped with a timestamp and packaged as an equipment energy storage event; an analysis device analyzes the current power grid event to obtain the current load rate of the power grid, and the current load rate of the power grid is compared with a set load rate; the equipment energy storage event happening within a set time period after the current time is analyzed to obtain the current energy storage rate of the energy storage equipment, and the current energy storage rate of the energy storage equipment is compared with a set energy storage rate; a demand response judgment device combines analysis results into several combined results; for each combined result, if the combined result is judged to meet criteria, it is judged that a demand response opportunity is provided at present; a control device controls corresponding equipment. According to the technical scheme, the various load devices are controlled according to demand response opportunities, and the electric energy utilization efficiency can be improved.

The invention provides an echo view registration method for a sub-aperture altimeter, which comprises the following steps of: multiplying a signal by a frequency scaling function to remove distance curved spatial variability; performing inverse fourier transform in a distance direction, multiplying by a conjugation of the inverse fourier transform of a certain function, namely a residual video phase correction function, and finishing residual video phase correction, namely 'deskew' processing; multiplying by an inverse frequency scaling function, namely eliminating a secondary phase error introduced by the frequency scaling function to finish scaling processing; multiplying the scaled signal by a linear phase function to perform distance migration correction so as to finish registration in a view distance direction; performing azimuth compression on an obtained sub-view of the view distance registration to obtain a compression sub-view corresponding to an aperture; and performing registration in an azimuth direction on all the obtained compression sub-views, and extracting each azimuth-registered equivalent sub-view unit for subsequent tracking estimation or imaging processing.

The present invention discloses a light emitting device driver circuit and a method for driving a light emitting device. The circuit comprises: a power stage performing power conversion on an input voltage to supply an output current to one or more light emitting devices; and a control circuit sensing the output current of the power stage to feedback control the power stage accordingly.

The invention provides a method and a device for controlling secondary hoisting of a crane winch, and the method and device provided by the invention are used for solving the problems of low power utilization efficiency, poor control effect and higher equipment manufacturing cost during control over gliding down of the secondary hoisting of the crane winch. The method comprises the following steps of: recording the pressure of a winch motor when the crane winch performs hoisting; detecting the current pressure of the winch motor when the crane winch performs secondary hoisting, and comparing the current pressure with the recorded pressure of the winch motor; and if the current pressure of the winch motor is less than the recorded pressure of the winch motor, braking a winch mechanism, and pressurizing the hoisting loop of the winch motor to enable the current pressure to be not less than the preset pressure, wherein the preset pressure is determined according to the recorded pressure of the winch motor. By utilizing the technical scheme provided by the invention, the power utilization efficiency and the control effect are improved, and the manufacturing cost of equipment is reduced.

The invention belongs to the field of microbial electrochemistry, and discloses a method for in-situ recovery of high-purity struvite through a microbial electrolytic cell. The method comprises the steps that at least one of phosphorus-containing wastewater and phosphorus-containing sludge is added into the microbial electrolytic cell after microbial acclimation, an external voltage is applied tocarry out a microbial electrolysis reaction for a period of time, and then struvite sediment can be separated out, wherein the external voltage is smaller than the electrolytic voltage of water. According to the method, a microbial electrolytic cell (MEC) technology is utilized, and micro-voltage less than that of electrolytic water is adopted so that the problems that the time for obtaining the struvite through ectopic crystallization is long, the purity is low, particles are small and the sedimentation and separation performance is poor can be effectively solved, and the electric energy consumption is greatly reduced. Moreover, the method is based on an in-situ reaction, on the premise that stirring is not needed, the nucleation rate of struvite crystals is increased, the growth rate ofthe struvite crystals is increased, the limit of the growth of the struvite crystals is broken through, the particle size of the struvite is increased, the purity of the struvite is improved, and in-situ crystallization recovery of the high-purity struvite is achieved.

The invention discloses a DC micro-grid system and a control method, wherein, the system comprises micro-source module composed of photovoltaic power generation module and wind power generation module, DC carrier module, grid interface module, energy storage battery module and DC bus, wherein, the micro-source module, DC carrier module, grid interface module, the energy storage battery module is connected with DC bus through power electronic device and realizes energy exchange through DC bus, the DC micro-grid is controlled commonly by the separate controller of the micro-source module, the DC carrier module, the grid interface module, the energy storage battery module and micro-grid central controller, the micro-grid central controller MGCC is super controller relative to separate controller. The technical scheme controls DC bus stably and guarantees the system stable operation.

A circuit achieving power flow control and small current ground fault active compensation arc suppression simultaneously is characterized by comprising a three-phase parallel module, a first coupling transformer, a three-phase serial module, a second coupling transformer and a direct current bus voltage stabilizing unit; when power flow control is conducted, the three-phase parallel module and the first coupling transformer are used for providing active power balance for the interior of the circuit and conducting reactive compensation on the circuit through the first coupling transformer, and when active compensation arc suppression is conducted, the three-phase parallel module and the first coupling transformer are used for providing a zero-sequence compensation current for a small current ground fault; when power flow control is conducted, voltage is inserted into a power distribution system circuit through the second coupling transformer to change power flow; the direct current bus voltage stabilizing unit connects the three-phase serial module with the three-phase parallel module and is used for providing stable direct current voltage for the direct current side of the three-phase serial module and the direct current side of the three-phase parallel module. According to the circuit achieving power flow control and small current ground fault active compensation arc suppression simultaneously, by means of the three-phase parallel module, the three-phase serial module and the direct current bus voltage stabilizing unit, the functions of power flow control small current ground fault active compensation can be achieved simultaneously.

The invention discloses a micro-grid region energy control system and control method. A micro-grid region comprises one or more micro-grid units; each micro-grid unit comprises a unit energy router and at least one set of new energy power generation equipment, energy storage equipment and electricity utilization equipment; the micro-grid region is provided with a region energy router; the micro-grid region is connected with a public power grid through the region energy router; the micro-grid region is provided with a region new energy power generation device and region energy storage equipment which are shared by the multiple micro-grid units; and the region new energy power generation device and the region energy storage equipment are connected with the region energy router. The micro-grid region energy control system solves the problem that a micro-grid energy control system is relatively low in stability in the prior art, meets a peak-alternation operation requirement of a power grid, reduces the electricity utilization cost and also improves the utilization efficiency of new energy power generation.

The invention provides a rubber wheel hinging type bogie for a guiding trolleybus and the guiding trolleybus. The bogie comprises two active steering axle assemblies or the combination of one active steering axle assembly and a power shaft assembly/non-power shaft assembly supported by two tires or one tire. The two assemblies are connected through a hinging assembly. The guiding trolleybus comprises a trolleybus head assembly, one or more expandable trolleybus body assemblies, a trolleybus tail assembly and a control system. The rubber wheel hinging type bogies are arranged between the trolleybus head assembly and the trolleybus body assemblies and between the trolleybus body assemblies and the trolleybus tail assembly. The rubber wheel hinging type bogie for the guiding trolleybus and the guiding trolleybus have the advantages of being simple in structure, convenient to install, convenient to control and the like.

The invention relates to a dynamic voltage-adjustment reactive compensation technology, in particular to a variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method includes the steps of setting a series-parallel connection assembly for a variable electric reactor and a capacitor and connecting the series-parallel connection assembly into a load side inlet; detecting the voltage offset and operation conditions of the outlet end and the power factor of the inlet end of the assembly in real time; dynamically controlling the parameters of the variable electric reactor and the capacitor in series-parallel connection according to the voltage offset and operation conditions of the load side and the power factor on a power grid side, and enabling the voltage on the load side to reach the standard and the power factor on the power grid side to be improved. The variable series-connection reactance dynamic voltage-adjustment reactive compensation device comprises a series-parallel connection unit for the variable electric reactor and the capacitor, a load voltage offset and power grid reactive vacancy detection unit, a dynamic voltage-adjustment and reactive power compensation control unit, a dynamic voltage-adjustment and reactive power compensation execution unit and an element and device protecting unit. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device can be used for controlling low voltage, improving electricity quality, reducing losses, saving energy and improving power supply reliability and electricity utilization rate, and have the advantages of being safe, being environmentally friendly, saving energy and increasing the effect.