270 results about "Environmental Wind" patented technology

An embodiment of the invention provides a method, a device and a system for controlling wind alignment correction of wind turbine generator systems. The method includes acquiring environmental wind speed values, yawing wind alignment angle measured values and generated power values of the wind turbine generator systems in real time; dividing the various acquired environmental wind speed values into a plurality of wind speed sections according to the magnitude of the environmental wind speed values and extracting the various yawing wind alignment angle measured values and the generated power values in at least one wind speed section; determining the maximum values of the extracted generated power values in the various wind speed sections; computing wind alignment correction deviation of the wind turbine generator systems according to the yawing wind alignment angle measured values corresponding to the maximum values of the extracted generated power values in the various wind speed sections; correcting follow-up acquired yawing wind alignment angle measured values by the aid of the wind alignment correction deviation. According to the technical scheme, the method, the device and the system have the advantages that wind alignment correction control operation can be implemented on the wind turbine generator systems, and the correction efficiency can be improved.

The invention provides a method of using the wind-induced vibration phenomenon of a micro structure to generate power and a micro generator based on wind-induced vibration mechanism and piezoelectric effect, wherein the micro generator comprises a silicon underlay, a composite beam/membrane comprising a piezoelectric layer and metal electrodes on the upper surface and the lower surface thereof, and the like. When the load of environmental wind causes the vibration of the composite beam/membrane structure comprising the piezoelectric layer, the vibration of the beam/membrane structure can cause the alternative change of the stress of the piezoelectric layer; due to the piezoelectric effect, the upper metal electrode and the lower electrode of the piezoelectric layer can generate an alternatively changed electric potential difference; and the electric potential difference can supply power for the load or a power accumulator. The composite beam/membrane structure comprising the piezoelectric layer can adopt a plurality of structure forms comprising a cantilever composite bema, a double-end fixedly supported composite beam, a multi-point fixedly supported composite part or a composite membrane which is partially and fixedly supported in the boundary. The micro wind turbine generator based on wind-induced vibration mechanism does not need a rotating mechanism, has a simple structure, is convenient to adopt silicon micro-processing technology to implement batch processing, has low cost, and is suitable for supplying power for wireless sensing network nodes, and the like.

An enclosed wind and hydropower plant comprising apparatus being configured for directing environmental wind into a building structure for the operation of wind turbine assembly, and for generating wind when there is no environmental wind to operate the enclosed turbine assembly.

The invention discloses a diversion device for environmental wind outside a vertically arranged air-cooled radiator of an indirect air cooling system, and belongs to the field of power station cooling systems. The diversion device for the environmental wind consists of six diversion flat plates which are uniformly distributed on the periphery of the windward side of the air-cooled radiator to form a fan shape, wherein the diversion flat plates have an equal height; the tops of the diversion flat plates are parallel to the upper edge of a cooling triangle of the air-cooled radiator; the widthsof the diversion flat plates are sequentially gradually decreased from the far end to near end of a wind field; and the diversion flat plates keep a certain identical distance away from the inlet surface of the cooling triangle of the air-cooled radiator. By the diversion device for the environmental wind field outside the air-cooled radiator, after oncoming transversal wind which flows approximately in parallel from the air-cooled radiator is diverted by the diversion flat plates, the pressure of air at an inlet of the cooling triangle is increased, and the air enters the air-cooled radiatorin a direction approximately vertical to the inlet surface of the cooling triangle, thereby making the cooling air flow of the cooling triangle in different sector more uniform and improving the radiation performance of the air-cooled radiator.

The invention relates to a safe driving method and system in adverse wind environment. The safe driving method comprises: performing numerical simulation on laws of aerodynamic characteristics for different train types in different road conditions and various environmental wind speeds, wind directions, so as to obtain theoretical relationship of aerodynamic characteristics for different train types in different road conditions and various environmental wind speeds, wind directions; according to overturning stability and the theoretical relationship of aerodynamic characteristics of train on straight track and curve track, and train system dynamics and train aerodynamics, performing numerical simulation and wind tunnel test, establishing train overturning stability calculation relationship under coupling of road conditions-train types, load-wind speed and wind direction-train speed, and obtaining train driving speed threshold of environmental wind speeds and wind directions according to the relationship.

The invention discloses a temperature control system of an environmental wind tunnel, comprising a wind tunnel heat exchanger, a main pipe loop and a plurality of heat exchange branches. The wind tunnel heat exchanger is installed on an expansion section of the wind tunnel. The main pipe loop is a pipeline connecting the inlet and the outlet of the wind tunnel heat exchanger. A plurality of heat exchange branches are connected in parallel to the main pipe loop and can be cycled independently by the main pipe loop. The heat exchange branch comprises a brine circulation unit and a heat exchangecirculation unit. The brine circulation unit comprises a flow-down pipeline, a return pipeline, a drive pump, a three-way valve and a regulating branch. The flow-down pipeline communicates with the main pipe loop and the heat exchange circulation unit, and the three-way valve and the drive pump are sequentially installed along the flow direction on the flow-down pipeline. The return pipeline communicates with the main pipe loop and the heat exchange circulation unit in the downstream of the flow-down pipeline. The regulating branch communicates with the flow-down pipeline and the return pipeline by the three-way valve. The invention adopts the three-way valve to change a blending ratio according to a temperature feedback, the variable is unique, and the adjustment is simple.

The invention relates to a sand wind environment wind tunnel experiment model device for simulating different field wind directions. The sand wind environment wind tunnel experiment model device is characterized in that cylindrical roll balls are placed on the circumference of a circular roll ball tray arranged on a lifting support to support an experiment platform; the experiment platform is a circular disc, a sample is placed on the experiment platform, the disc is marked with a 360-degree dividing rule, a circumference rotating track is arranged below the experiment platform, a platform rotating shaft is arranged in the middle of the experiment platform, the bottom of the platform rotating shaft is provided with a variable speed big gear, a control switch controls a stepping motor, a stepping motor rotating shaft drives a small gear to rotate, the small gear drives the big gear at the bottom of the platform rotating shaft to rotate, the big gear drives the platform rotating shaft and the experiment platform to rotate, the circular roll ball tray on the lifting support on the lower portion is driven by the circumference rotating track below the experiment platform to rotate, and the experiment platform is embedded in the bottom of a sand wind environment wind tunnel experiment section to be flush with the bottom of the wind tunnel experiment section. The sand wind environment wind tunnel experiment model device can simulate the field wind directions comprehensively, solves the problem of the wind direction simulating error under changeable wind velocities and directions and provides experiment conditions for studying the sand wind movement characteristics under conditions of the different wind directions and the different wind velocities.

The invention discloses a maximum output power control method for tracking of a wind power generation system. The method comprises the steps of sending a measured environmental wind speed signal to a controller through a wind speed sensor; determining a given running speed signal of a wind power generator under the current wind speed condition according to a wind speed-maximum power feature curve stored in the system; comparing the given running speed signal with the actual running speed signal of a generator; conditioning the signal through a conditioner to output a control signal; conditioning the electromagnetic torque of the generator according to the control signal and on the basis of the current voltage, current, position of magnetic pole and angle condition of the generator to enable the running speed of an AC generator to be close to the expected running speed, so as to reach the specified instruction running speed. According to the method, the wind speed sensor is used for sensing the environmental wind speed, and the running speed of the wind power generator of the wind power generation system is fast close to the maximum power point under the current wind speed condition and finally reaches the maximum power running point, so as to achieve the purpose of tracking the maximum wind energy of the wind power generation system.

The invention relates to a control method and system for an elevator door motor. The intensity of environmental wind power of the elevator door motor is detected and output to the control system for the elevator door motor; the control system converts the intensity of the environmental wind power into an analog quantity A; when the control system is affected by the environmental wind power, the moment of the control system is linearly improved according to the analog quantity A; when it is detected that the resistance to the control system is larger than a set value or the resistance to the control system in the door closing process is larger than the set value or the resistance to the control system in the door closing keeping process is larger than the set value, the door motor maximum output moment, the door motor closing resistance moment, the door motor closing keeping resistance moment are linearly improved again according to the analog quantity A until the resistances to the control system are all smaller than the set value. Therefore, the moment of the control system for the elevator door motor can be adjusted automatically according to the intensity of environmental wind power, and the door motor can be closed successfully without the need for additional operation by a user.

The invention discloses a wind tunnel experiment method of pulverized coal piling-up dusting rules. Experimental equipment or instruments are utilized, such as experimental wind tunnels, model machines of stacker-reclaimers, anemographs, microscale weighing scales, drying boxes and screening instruments; and by means of measurement of the dusting amount of four coal types comprising raw coal, large-mine raw coal, water washed coal and clean coal under a natural moisture content, the experimental correlation between the piling-up dusting rate and environmental wind speed, and loading and unloading heights satisfies the equation that beta=k*U<3.13>*H<1.64>, and correction factors k of the four coal types are obtained. Researches show that a certain relation exists between dusting quantity and entrainment air quantity during coal loading and unloading processes, and the values of the k are different if coal types are different. The wind tunnel experiment method is an effective method of being capable of being combined with pulverized coal piling-up dusting rule theoretical analysis, and is convenient to implement, strong in practicality, and capable of measuring the dusting quantity of different coal types along with changes of the loading and unloading heights and the wind speed. Therefore, the dusting rules during piling-up operation of coal can be explored, and basic data are provided for port dust prevention and treatment.

The invention discloses a building outer face fire simulation apparatus, characterized by comprising: a multi-layer combustion chamber, a simulated side wall, a moving platform, an armored thermocouple probe, a heat radiation flux measuring instrument, a thermocouple patch, a glass frame, sunlight-controlled film-coated glass, simulated combustibles, a water-cooled heat flow meter, an axial fan, a DV camera, and a telescopic fireproof cornice. The multi-layer combustion chamber is formed by the lamination of two combustion chambers. The simulated side wall is combined with the wall faces with windows to form a U shaped structure. The telescopic fireproof cornice is arranged at the upper part of the lower-layer combustion chamber's windows. The apparatus of the invention can be used in the research on the fire spreading condition of the outer wall face of a high rise building under the action of an environmental wind, the research on the development characteristics of the fire flames and the smoke plume under the restrictive condition of the side wall as well as the characteristic rule of a secondary fire generated from the fire overflow at the outer side of the building into the upper layer combustion chamber, so as to provide reference to fire prevention designs for similar buildings.

The invention discloses a wide-water-surface oil pool fire combustion simulation device under the effect of environmental wind. The wide-water-surface oil pool fire combustion simulation device comprises a horizontal wind system, a wide-water-surface oil pool fire simulation system and a liquid level stabilizing system arranged beside the wide-water-surface oil pool fire simulation system and forming a communication system with the wide-water-surface oil pool fire simulation system, wherein the horizontal wind system controls an axial flow fan through a digital frequency converter, for providing the environmental wind required by a simulation experiment; the wide-water-surface oil pool fire simulation system provides a combustion platform for simulating the wide-water-surface oil pool fire through the manner that a small-size oil pool is fixed inside a water pond; the liquid level stabilizing system is connected with the wide-water-surface oil pool fire simulation system through an L-shaped PC pipe to form a communicating device system, for controlling the liquid level of fuel oil to be constant during the experimental process. The wide-water-surface oil pool fire combustion simulation device has the beneficial effects that the wide-water-surface oil pool fire combustion boundary conditions with high similarity can be provided, and the liquid level stabilizing system with adjustable height is adopted, so that the influences of the wall heat transfer effect during the combustion process are eliminated, and the experiment reliability, accuracy and repeatability are improved.

The invention relates to a direct air cooling island windbreak deflecting device for a power station, which comprises windbreak deflecting nets, a fixed support rod and an adjustment rope, wherein the fixed support rod and the adjustment rope are fixedly mounted between the lower edge of an air cooling island platform and the ground respectively, the fixed support rod is positioned at the inner side of the adjustment rope, the windbreak deflecting net is composed of a porous netting sheet and side frames, a plurality of windbreak deflecting nets are distributed between the fixed support rod and the adjustment rope in a vertically layered manner, one end of each of the windbreak deflecting nets is fixed on the support rod while the other end of the windbreak deflecting net is fixed on the adjustment rope, the angle of inclination of the windbreak deflecting nets is adjusted by pulling the adjustment rope up and down, so that the direction of environmental wind from the outer side of the air cooling island is changed from downward slope to upward slope, therefore, the device plays the role of defecting the environmental wind, increases the pressure in a negative pressure area, raises the flow rate of cooling air from air cooling units at the periphery of the environmental wind, reduces the hot air reflux, improves the heat exchange characteristic of the air cooling condenser, and has no impact on air flow of internal air cooling units, so as to enhance the operating safety and economical efficiency of air cooling unit.

The invention discloses an air-cooling condenser structure containing a horizontal shaft axial flow fan group and a vertically-arranged fin tube bundle and belongs to the technical field of power station air cooling. The air-cooling condenser structure is formed by a main exhaust pipeline, a horizontal steam branch pipe, a vertical steam distribution pipe, an air-cooling condenser fin tube bundle arranged vertically in a layered mode and horizontal shaft axial flow fans. Steam turbine exhaust steam passes through a main steam pipeline and a horizontal steam branch pipe, enters the vertical steam distribution pipe, and then enters the fin tube bundle through a steam distribution header. The fin tube bundle is divided into two columns and forms a triangular structure, the fin tube bundle columns are perpendicular to the ground and arranged in parallel in the layered mode along the height direction, and the planes of impellers of the fan group are arranged to face toward the predominant wind direction of a power station. According to the air-cooling condenser structure, the conditions of air flow deformation of fan inlets can be improved, kinetic energy of an environmental wind field is effectively used, thermal performance of a direct air cooling system is improved, further the number of exhaust pipelines to be used and floor area of the exhaust pipelines in the direct air cooling system can be reduced, and investments and cost of the system are reduced.

The invention discloses a shutter type environmental wind guiding device of an air cooling island of a power plant, belonging to the technical field of energy power. The shutter type environmental wind guiding device is installed between the lower margin of an air cooling platform and an upright post brace of the air cooling platform, is fixed on the footpath or wind wall around the periphery of the margin of the air cooling platform and inclines from the outside of the air cooling platform to the air cooling island. The angle of inclination of a guiding flat slab is regulated from 30 degrees to 60 degrees by a shutter lift regulating mechanism; the number of layers of the guiding flat slab is determined according to the distance between the lower margin of the air cooling platform and the upright post brace. The device of the invention adopts the smooth guiding flat slab with regulable angle to realize the guiding function of the environmental wind and ensure that the kinetic energy of the environmental wind moving transversely on the lower part of the air cooling platform is converted into the pressure energy of cooling air and the kinetic energy blown toward the inlet of an air cooling fan along the guiding flat slab so as to improve cooling air flow, reduce hot air reflow, improve operating characteristics of air cooling systems, decrease back pressure of machine sets and improve safety and economical efficiency of operation of machine sets.

A blade support limb structure of vertical axis wind power generator includes a fixed support limb (1) and a rotatable support limb (2), one end (21) of the rotatable support limb is connected with one end (22) of the fixed support limb and the rotatable support limb may rotate around it. The structure keeps a wind wheel at stable rotation speed in the case of environmental wind speed exceeds rated wind speed, thereby to ensure that vertical axis wind power generator outputs constant power. The structure solves a problem of constant power output of vertical axis wind power generator from hundreds watt to thousands watt, so its applications are wide.

The invention discloses an experimental device for research on flow field and pollutant dispersion in urban continuous street canyons. The device comprises a wind tunnel mechanism, a continuous street canyon mechanism, a flue gas flow field tracer mechanism, a street canyon bottom plate heating mechanism, and a multi-parameter measurement mechanism. The continuous street canyon mechanism comprises two street canyons, three buildings and a bottom plate. The three buildings are formed by transparent fireproof glass, and the bottom plate is formed by firebricks. The street canyon bottom plate heating mechanism is made by arranging carbon-silicon heating rods in the bottom plate at equal intervals, and the heating rods heat the bottom plate evenly to simulate scenarios of the street canyon ground heated by different solar irradiation. The invention provides the experimental device for studying the flow field and typical pollutant dispersion rules in urban continuous street canyons under the coupled force of urban environmental wind and combustion strong heat buoyancy sources.

The invention discloses a communication base station lightning arrester capable of being automatically started according to meteorological conditions. The lightning arrester comprises a lightning protection box, wherein a storage cavity is formed in the lightning protection box, a supporting plate capable of sliding up and down is arranged in the storage cavity, a lightning rod is fixedly arrangedin an upper end surface of the supporting plate, a wind power detection box is fixedly arranged on the left side of an upper end surface of the lightning-protection box, a bevel gear cavity is formedin the wind power detection box, a wind power shaft is rotationally arranged in a left wall, a left end of the wind power shaft extends to the left side of the wind power detection box, a wind powerblade is arranged on the excircle surface, and the wind power blades can rotate due to wind power. The lightning arrester is mounted at the top of a communication base station, the lightning rod can automatically extend out to protect electronic equipment of the communication base station according to the wind power change and rainfall condition of the environment where the communication base station is located, equipment damage is avoided, meanwhile, the lightning rod is automatically recycled in a non-working state, the lightning rod is prevented from being exposed and damaged for a long time, and the overhauling and replacing frequency is reduced.

The invention discloses an air cooling tower. The air cooling tower comprises a tower body and a flow guiding device; the flow guiding device comprises a central flow guiding part and flow guiding plates, the central flow guiding part is arranged at the center of the bottom of the tower body, a flow guiding face is formed in the circumferential direction of the central flow guiding part, the flow guiding plates comprise eight inner flow guiding plates and eight outer flow guiding plates, the eight inner flow guiding plates are connected to the flow guiding face of the central flow guiding part in the circumferential direction in an evenly-distributed mode, the eight outer flow guiding plates and the eight inner flow guiding plates are arranged outside the tower body in a one-to-one correspondence mode in the circumferential direction, and channels communicating with the flow guiding face are formed between every two adjacent outer flow guiding plates and between every two adjacent inner flow guiding plates. According to the air cooling tower, by additionally arranging the flow guiding device, wind field energy can be reasonably utilized, the ventilation quantity in the air cooling tower can be increased, influences of a negative pressure zone on an air flow field can be reduced, and then adverse effects of environmental wind on running of an indirect air cooling system and the heat exchange performance of an air cooling radiator are weakened. The invention further discloses the indirect air cooling system.

The invention discloses a variable-angle fire spreading experimental device for solid fuel under the action of environmental wind. The device comprises a variable-angle solid fuel experiment table, anair supply system and a data acquisition and processing system. The variable-angle solid fuel experiment table can change the size of an experimental material according to experimental requirements,the side edge of the experiment table is connected to an angle adjusting disc so that the experiment table can rotate at any angle, and the environmental wind indifferent directions and magnitudes canbe simulated by combining different arrangement modes of the experiment table and a wind tunnel; a thermocouple frame at the back of the experiment table is of a combined rectangular structure and ismatched with a front movable thermocouple frame to measure the temperature of any position of the experimental material, and experiment-related parameters can be measured by combining a heat flow measurement system and a camera shooting system. According to the device, a set of building material fire spreading simulation experimental device under the coupling action of the environmental wind andan inclination angle is established, the air supply system is safe, convenient and accurate, the experimental device has a complete parameter measuring system, and a complete process fromignition of abuilding material to spreading under different environmental conditionscan be researched.

The invention discloses a wind farm dynamic equivalence method based on homogeneous generator clustering. The method is as follows: modeling the distribution of environmental wind speed; the wake effect model is established according to the interaction of input wind speed when the units are irregularly arranged. Aiming at the units with irregular arrangement, the influence of unequal length of connecting cables on the dynamic characteristics is analyzed. The characteristic equation of doubly-fed wind turbine electromagnetic system is solved, the dominant mode of the equation is analyzed, and the basis of homology is discriminated. Taking the characteristic quantities obtained from the homology discrimination as the basis of wind turbine group classification, the wind turbine group in the field is classified by using hierarchical clustering algorithm. Based on the clustering results, the capacity weighting method is used to calculate the parameters of the equivalent units. The inventionsolves the wake effect caused by irregular arrangement of generating units in the field under the influence of complex terrain, and the problem of low precision of equivalent model caused by currentcollector line impedance, reduces the power error of steady state and dynamic simulation, and is suitable for establishing the wind farm equivalent model.