40 results about "Icing" patented technology

A system to control a wind turbine, including meteorological instruments for measuring ambient climatic conditions, and generating corresponding meteorological signals, a memory for storing an icing tolerance, a first calculator for calculating an overall icing probability based on the meteorological signals and a controller for stopping the wind turbine when the overall probability of icing is greater than the icing tolerance. Also disclosed is a method for controlling a wind turbine, including the steps of a) measuring ambient climatic conditions and generating corresponding meteorological signals; b) storing in memory an icing tolerance; c) calculating an overall probability of icing based on the meteorological signals; and d) stopping the wind turbine when the overall probability of icing is greater than the icing tolerance.

The invention relates to the technical field of aircraft anti-icing and deicing performance testing, and discloses an icing wind tunnel spraying device and a water supply pressure quick response device and method thereof. The icing wind tunnel spraying device comprises a gradient pipe, a water tank, a control device and a plurality of spraying assemblies, wherein the top end of the gradient pipe is higher than the bottom end of the gradient pipe; the top end and the bottom end of the gradient pipe are provided with pressure sensing devices correspondingly; the cross sectional area of the gradient pipe is gradually reduced in the direction from the top end to the bottom end; the water tank communicates with the top end of the gradient pipe through a first pipeline; the water tank communicates with the bottom end of the gradient pipe through a second pipeline; the first pipeline is provided with a switch valve and a booster pump so as to pump water in the water tank into the top end of the gradient pipe and enable the water to circulate in the gradient pipe; the second pipeline is provided with a flow control valve; the control device is electrically connected with the booster pump and the two pressure sensing devices; and the spraying assemblies are arranged along the length direction of the gradient pipe. According to the arrangement, the water supply pressure in the gradient pipe can be adjusted before the spraying assemblies are started, and invalid icing cloud does not exist.

The invention is suitable for the technical field of wind tunnel tests, and provides an icing wind tunnel air supply system and method. The icing wind tunnel air supply system comprises an air supply main path, a simulation main path, an air supply bypass and a plurality of air supply branch paths, and the outlet of the air supply main path is connected with the inlet of the simulation main path and the inlet of the air supply bypass; the outlet of the simulation main path is connected with the inlets of the plurality of gas supply branches; the simulation main circuit is provided with a first pressure sensor, and the plurality of gas supply branches are connected in parallel; a needle valve, a temperature sensor and a critical venturi tube are sequentially arranged on the air supply branch in the airflow direction. According to the icing wind tunnel air supply system and method provided by the invention, the flow of each branch can be quickly adjusted on the basis of ensuring the stability of the air supply system, the change of the air supply temperature on each air supply branch is avoided, and the test efficiency is improved.

The invention provides a wind driven generator icing weather resistance experimental system and method. The wind driven generator icing weather resistance experimental system and method are used for achieving the purpose that in the prior art, the energy of removing the attaching ice on fan blades needs to be researched. The system comprises a wind driven generator blade simulation device, an environmental simulation device and a heat energy consumption testing device. The heat energy consumption testing device provides the heat and tests the situation of temperature changes of the hot air existing before and after the attaching ice drops. The wind driven generator blade simulation device comprises an experimental cavity, a blade and a servo motor. The blade is arranged in the experimentalcavity through a rotating support. The end, connected with the blade, of the rotating support is arranged in the experimental cavity, and the other end of the rotating support is connected with the output end of the servo motor. The rotating support is driven by the servo motor to rotate so as to drive the blade to rotate. By the adoption of the wind driven generator icing weather resistance experimental system and method, the attaching ice removal force or amount under different natural conditions can be tested, and the result is more reliable.

The invention belongs to the technical field of polar region observation devices, and discloses a sea ice growth observation system, the sea ice growth observation system comprises a buoy and a sea ice observation subsystem, the sea ice growth observation system is characterized in that the buoy is configured to float above sea ice surface, the outer wall of the buoy is provided with concave grains for icing, the sea ice observation subsystem comprises a plurality of groups of sea ice thickness sensors which are in one-to-one correspondence along the vertical direction; and the plurality of groups of sea ice thickness sensors are arranged at the periphery of the buoy at intervals. Beneficial effects are as follows: the buoy can float on the sea throughout the year; when the temperature isreduced to an icing condition; seawater located in the concave lines can be frozen, meanwhile, the friction force between newly-generated sea ice and the buoy during sea ice freezing is increased, thefreezing strength during sea ice growth is improved, and therefore the influence of waves and ocean currents on buoy freezing can be resisted, the posture stability of the buoy during newly-generatedsea ice growth is improved, and the accuracy of observing the newly-generated sea ice is improved.

The invention discloses a marine intake air filtering device. The marine intake air filtering device comprises a frame assembly, a filtering assembly and an anti-freezing assembly, the frame assembly is of a multi-layer frame body structure, and the filtering assembly comprises a shutter, a weather tight structure, a front inertia level, a net pad level and a rear inertia level which are sequentially mounted in the multi-layer frame body structure from outside to inside; the anti-freezing assembly is installed in the louver and the weather tight structure. The device is simple and stable in structure, rain waves and water mist can be effectively blocked through the front-back combination mode of the louver and the weather tight structure, and solid particles and salt mist can be efficiently filtered and separated through the combination mode of the front inertia level, the net pad level and the rear inertia level; and meanwhile, low-temperature freezing of the device can be prevented through an electric heating mode, the anti-freezing effect is achieved, normal operation can be guaranteed, and meanwhile the service life of the device is prolonged.

The invention relates to a pontoon anti-icing system and a pontoon anti-icing method based on icing probability prediction, and belong to the technical field of pier safety equipment. The system is characterized by comprising at least a lifting mechanism for driving the pontoon to move up and down, a prediction module that predicts an icing probability, and a controller for controlling the liftingmechanism to act according to the logic judgment value of the prediction module. By adopting the technical scheme, the anti-icing pontoon system and method based on icing probability prediction can effectively predict whether a water area is iced or not, and a pontoon is lifted in advance by using an electromechanical full-automatic lifting column, so that the damage of ice load to the pontoon can be effectively prevented; and the anti-icing pontoon system and method are particularly suitable for the water areas where the ring, the Circum-Bohai-Sea and the sea river mouths and river yachts are moored and are easily influenced by ice disasters in winter.

The invention is suitable for the technical field of icing wind tunnel tests, and provides a hot line unit dry power calculation method and a liquid water content calculation method based on the hot line unit dry power calculation method. The method includes the steps that calibration is conducted under the dry air condition, and the fitting relation between the hot line unit dry air nusselt number, a hot line Reynolds number and a dry air Prandtt number are obtained; the dry power of the hot line unit under the freezing cloud and mist condition can be calculated through the relation, and then the liquid water content is further calculated based on the dry power. By means of the method, refined calculation of the liquid water content of the icing cloud in the icing wind tunnel can be achieved, the technical problem that in the prior art, the measurement precision is low is effectively solved, and important technical support is provided for refined measurement of the icing cloud in the large-scale icing wind tunnel.

The invention relates to a temperature control distributed marine pipeline anti-freezing device. The device comprises a pipeline heat tracing device and an electric heat tracing control box which are connected through a circuit, and the electric heat tracing control box controls the pipeline heat tracing device to be started or stopped. The pipeline heat tracing device comprises a plurality of electric heat tracing belts, wherein each electric heat tracing belt is laid along a pipeline and used for heating the pipeline and preventing the pipeline from freezing; and a plurality of temperature sensors attached to the outer wall of the pipeline at intervals and used for detecting the real-time temperature of different positions on the pipeline. The electric heat tracing control box is arranged on an aisle beside the pipeline and comprises a PLC which is in circuit connection with all the temperature sensors and used for receiving temperature signals fed back by the temperature sensors and sending control signals to control all the electric heat tracing belts to heat the pipeline or stop heating. The device has the advantages of being capable of achieving automatic detecting and alarming, low in manual operation cost and good in pipeline heat preservation effect.

The invention relates to the technical field of marine winches and particularly discloses an underwater fairlead device. The underwater fairlead device comprises a pulley, a pulley shaft, a pulley support, a locking mechanism, a swing base, fixing shafts, an upper fixing base and a lower fixing base, wherein the upper fixing base and the lower fixing base are vertically fixed to the side faces of a hull, the swing base is fixed to the upper fixing base and the lower fixing base, the number of the fixing shafts is two, one end of each of the two fixing shaft is fixed to the swing base, the other end of each of the two fixing shaft is fixed to the upper fixing base and the lower fixing base respectively, the pulley support is connected with the swing base through a rotating pin shaft, the pulley is assembled on the pulley support through a pulley shaft, and the locking mechanism is used for locking the overturned pulley support on the swing base. The underwater fairlead device changes a single fairlead device mode into a movable mode, the position of the underwater fairlead device is changed, the problem that the fairlead device is in extruding contact with an ice layer due to seawater surface icing during navigation of an ice class ship and accordingly navigation resistance is increased, and the service life of the underwater fairlead device is prolonged.

The invention relates to an icing and freezing rain test device and test method. The device comprises a test box with adjustable internal temperature, a horizontal rotary table and water spraying equipment, and can spray water mist to a test sample to simulate a real rainwater environment for the test sample. The device is provided with an exhaust pipeline, blast equipment and an air supply pipeline, air in the test box can be used for blowing breeze for a test sample, so that the air pressure and the air temperature in the test box are ensured to be unchanged, and sprayed rainwater can be uniformly attached to the side wall of the test sample by blowing the breeze for the test sample, and the icing of the test sample is more uniform. The device also includes measuring equipment which can measure the thickness of the ice layer on the test sample so as to judge whether the environmental condition required by the experiment is met or not. Therefore, the real environmental stress can be simulated for the test sample before the test sample is actually deployed, and a test environment is provided for checking and verifying the adaptability level of the test sample to an icing and freezing rain environment.

The invention relates to a method and a system for blowing off floating ice in a ballast water tank by using hot air in a marine engine room. The method comprises the following steps that impurities in the hot air in the marine engine room are filtered, and the hot air is blown into the ballast water tank by using an air blower so that ballast water forms eddy current; therefore, water in the water ballast space is prevented from being frozen, and floating ice which is possibly generated is further melted through the hot air. The method is advantaged in that the temperature of the ballast tank and the temperature of ballast water in the ballast tank are increased through air waste heat in the marine engine room, so the anti-icing effect is achieved, low-grade heat in the marine engine room can be effectively utilized in the deicing mode, and therefore ship energy utilization efficiency is improved, and emission is reduced.

The embodiment of the invention provides an ice throwing prevention control method and system for a wind generating set and a computer readable storage medium. The control method comprises the following steps of determining wind generating sets with mutual ice throwing risks in a wind power plant, wherein the wind generating sets with mutual ice throwing risks comprise an ice throwing set and an ice-thrown set; determining an ice throwing sector from the ice throwing unit to the ice-thrown unit in the wind generating sets with the ice throwing risk; collecting information of an icing sensor arranged in the wind power plant; sharing the icing information detected by the icing sensor to each wind generating set in the wind power plant when icing is judged based on the information of the icing sensor; and controlling the ice throwing unit to enter a sector ice throwing prevention management mode based on the icing information when the cabin position of the ice throwing unit enters the ice throwing sector. Therefore, the ice throwing risk between the adjacent wind generating sets can be effectively reduced.

The invention discloses an ice melting pipeline and method for a water falling opening of an LNG ship in an ice area, and the pipeline comprises a water falling pipe which is connected between the deck outfall and a broadside water outlet, and an ice melting pipeline which is connected with the downpipe and a ship steam pipeline respectively, the ice melting pipeline is provided with a control valve used for controlling switching of a normal water falling mode and an ice melting mode so that normal liquid seawater at the water falling opening or seawater obtained after steam melting and conveyed through the steam pipeline at the water falling opening can be smoothly discharged to the outboard through the water falling pipe. The ice melting pipeline is connected between the downpipe and the ship steam pipeline, the ship steam serves as a dissolving medium to melt frozen seawater at the outfall, the problem that normal navigation of a ship is affected due to the fact that seawater at the outfall of a deck freezes in a low-temperature course is effectively solved, and the navigation safety of the ship is guaranteed.

The invention provides a wind driven generator icing weather resistance experimental system and method. The wind driven generator icing weather resistance experimental system and method are used for achieving the purpose that in the prior art, the energy of removing the attaching ice on fan blades needs to be researched. The system comprises a wind driven generator blade simulation device, an environmental simulation device and a heat energy consumption testing device. The heat energy consumption testing device provides the heat and tests the situation of temperature changes of the hot air existing before and after the attaching ice drops. The wind driven generator blade simulation device comprises an experimental cavity, a blade and a servo motor. The blade is arranged in the experimentalcavity through a rotating support. The end, connected with the blade, of the rotating support is arranged in the experimental cavity, and the other end of the rotating support is connected with the output end of the servo motor. The rotating support is driven by the servo motor to rotate so as to drive the blade to rotate. By the adoption of the wind driven generator icing weather resistance experimental system and method, the attaching ice removal force or amount under different natural conditions can be tested, and the result is more reliable.

The invention discloses a seawater main pipe plugging device and a plugging method thereof. Through the cooperation of an expansion device, a pressure rod assembly and a sealing assembly, a seawater main pipe orifice connected on the side wall of a seawater tank is plugged, so that all water in a pipeline and a valve is completely discharged, the problems that the valve is damaged due to the factthat the water is not completely discharged and ices and expands are effectively avoided, the potential safety hazard is greatly reduced, the ship upper discharge maintenance is reduced, and the shipmaintenance cost is reduced.

The invention relates to a polar scientific investigation drifting ship, and belongs to the technical field of ship design and manufacturing. The hull is of a main body structure with a small length-width ratio, the structural reinforcement level of the hull is greater than or equal to PC3 level, a spoon-shaped icebreaking bow is arranged at the bow part, an inclined ice discharging angle is arranged at the broadside, and an ice-level propeller is arranged at the tail part of the hull; a helicopter platform and a helicopter garage are arranged in a superstructure of the ship body; a posture adjusting system is arranged in the ship body. The polar region scientific investigation drifting ship / station / platform can bear ice pressure loads of polar region ice in all directions for many years, drifts along with the ice in floating ice and can meet the requirement for polar region long-term continuous scientific investigation operation, the broadside ice discharging angle and the posture adjusting system enable the drifting ship / station / platform to resist the ice extrusion loads in all directions, and the drifting effect is good. The icing probability and the heat loss can be reduced by the superstructure which is mostly closed and has a plump ellipsoid-shaped bow part; a helicopter platform and a helicopter library are arranged to widen the operation range.

The invention aims to provide a marine gas turbine inlet icing process observation test bed, which comprises a suction section box body, a mixing section box body, a test section box body, a marine gas turbine inlet scaling model and an inertia stage separator, wherein the mixing section box body is positioned between the suction section box body and the test section box body; an outlet of the suction section box body is connected with an inlet of the mixing section box body; the inertia stage separator and the marine gas turbine inlet scaling model are installed in the test section box body;a liquid nozzle and a solid nozzle are arranged in the suction section box body; and a centrifugal fan is connected with the test section box body through an inlet wire mesh filter. According to the method, the working environment of a marine gas turbine under the real extremely cold sea condition can be simulated, the marine gas turbine inlet icing rule is obtained, meanwhile, the marine gas turbine inlet icing condition can be controlled by changing parameter values influencing icing factors, numerical simulation results are compared and analyzed, and the research on the marine gas turbine inlet icing mechanism is carried out.

The invention relates to the technical field of dock gate engineering, in particular to an inverted-T-shaped dock gate winter temporary anti-icing measure. The inverted-T-shaped dock gate winter temporary anti-icing measure comprises the steps that compressed air is released into water from a bubble generator through an air injection device, the water is disturbed by bubbles to form strong turbulent water flow, and it is guaranteed that the water surface within a certain range away from the upstream face of a dock gate is not frozen; when winter comes, according to the temperature change of seawater, a main control button controls a driving assembly to drive a moving block to move on a moving rail, the anti-icing device on the moving block is adjusted to be below the horizontal plane of the seawater, and the bubble generator is located at different water level heights; the distance between a bubble generating device and the dock gate is adjusted through an electric telescopic rod, andthe anti-icing area is adaptively adjusted; and the compressed air exhausted by an air compressor enters an air storage tank, the air storage tank is used for balancing system pressure and reducing frequent loading and unloading of the air compressor, and the compressed air can be cooled again, so that the content of water in the compressed air is reduced.

The invention discloses an on-line monitoring device for icing of simulated wires based on the law of icing in micro-topography and micro-meteorological areas, which mainly includes simulated wires, stepping motors, motor fixing sleeves, rolling belt shaft bearings, sealing boxes I, sealing boxes II, three-dimensional Force sensor I, 3D force sensor II, stepper motor driver, stand and microcontroller I. The invention can monitor the ice thickness of the power transmission line under the same meteorological environment, and the device has small volume and low power, and can be conveniently installed on the pole tower.

The invention discloses an icing early warning determination method based on multi-source data fusion. The invention relates to the technical field of icing early warning, and solves the problem that in the prior art, the possibility of icing in each area cannot be predicted and the accuracy of the early warning is reduced. Through The icing prediction unit analyzes the environmental information to predict whether each area is icing, divides the area where the circuit to be detected is located into several sub-areas, obtains the environmental information, and obtains the icing prediction coefficient of the sub-area through the formula Xi, if the icing prediction coefficient Xi of the sub-region ≥ the threshold value of the icing prediction coefficient of the sub-region, the corresponding sub-region is marked as an icing sub-region, and the wind direction of the cold air is obtained, and then according to the time sequence of the cold air arriving at the sub-region , to sort each ice-covered sub-area, to predict the ice-covered area in each area, and to judge the time sequence of the ice-covered areas, so as to improve the accuracy of early warning.

The invention discloses an overhead transmission line ground wire deicing jump risk early warning method and system, and the method comprises the steps: employing a lead icing thickness calculation formula and a daily radiation value calculation formula based on weather forecast data, and calculating the lead icing thickness and the daily radiation value respectively; predicting a de-icing trend grade based on the wire icing thickness, the daily radiation value and the highest temperature; simulating the response of the overhead transmission line by adopting a pre-constructed finite element model based on the weather forecast data, and determining a deicing jump trend level; and determining an overhead transmission line deicing jump risk grade early warning based on the deicing trend grade and the deicing jump trend grade. According to the invention, an effective solution is provided for early warning of the deicing jump risk level of the overhead transmission line in areas with serious icing in China; and a basis is provided for pre-judging deicing jump to carry out line mechanical deicing or ice melting, and scheduling, operation and maintenance and other work can be well done timely and powerfully.

The invention discloses icing and reverse osmosis seawater desalination equipment and a control method thereof. A double-layer pipe is used for conveying new seawater and discharging concentrated seawater, and the filtered new seawater is heated up to 20 DEG C and is then placed in a reverse osmosis seawater desalination device for producing desalinated water; a seawater icing device consists of asteam boiler, a water vapor storage tank, a water vapor organic silicon rubber pipeline, a water vapor electromagnetic valve, a stainless steel hollow mesh and a sinking and floating device; the stainless steel hollow mesh is formed by sequentially splicing a stainless steel wind shield, a stainless steel heating square tube and a stainless steel floating tube with two closed ends from top to bottom. In winter, the seawater freezes in the stainless steel hollow mesh; water vapor enters the stainless steel heating square tube and then melts the edges of ice cubes; floating ice are crushed andthen transported to the shore by a ship, and then sent to a seawater ice funnel by means of a belt conveyor or a chain conveyor. A desalination water pump is inserted into the seawater ice funnel by means of a desalination tube, desalinated water is mixed with the crushed seawater ice, and the mixture is then sent to the waterworks through a chemical water pipe by means of a rodless screw extrusion conveying pump.

The invention discloses a contact evaporator and its application system and method, and designs three kinds of systems, which are respectively used in the fields of humid air latent heat utilization, seawater desalination, seawater desalination and power generation coupling. The high-pressure shell connected to the system has a working fluid inlet and a working fluid two inlet on the high-pressure shell, atomizers are installed on both the working medium one inlet and the working medium two inlet, and a liquid Solid outlet and gas outlet, the inlet end of the thermodynamic cycle system is connected to the gas outlet; the contact evaporator solves the problem of icing on the surface of the evaporator when the air source heat pump operates at a low temperature of the cold source, and the ground source heat pump and seawater source heat pump are affected. Geographical and geographical constraints, seawater desalination vacuum pump energy consumption and other problems, and when the surface seawater temperature is high, seawater desalination is coupled with the power generation system to achieve cascade utilization of energy.

The invention discloses a heat exchanger anti-icing method during defrosting of a heat pump unit and the heat pump unit. The heat exchanger anti-icing method comprises the steps that the protection temperature, the protection time delay and the anti-icing returning protection temperature difference are set; an anti-icing temperature sensor is arranged at the bottom of a water side heat exchanger to obtain the anti-icing temperature in real time; and an anti-icing mechanism of an evaporator is determined according to the anti-icing temperature, the protection temperature, the protection time delay and the anti-icing returning protection temperature difference. The method has the beneficial effects that by detecting the temperature of the bottom of the water side heat exchanger, a control system can accurately recognize the internal temperature of the water side heat exchanger, and therefore the situation that the evaporator is iced and damaged when a unit is defrosted in winter is effectively avoided.