1495 results about "Ice melting" patented technology

The invention relates to a large multifunctional environmental simulator for electrical tests, which comprises an environmental stimulation chamber and is characterized in that an air heat-exchange circulation system and an ice-melting system are arranged in the environmental stimulation chamber; and the environmental stimulation chamber further comprises an ice-coating, rain-exposing and ultrasonic-atomizing system, a water treatment system, a heat-fogging system, a cooling water circulation system, a refrigeration system, a vacuuming and defogging system, a measurement and control system and an ultra-high voltage power supply system for providing a high-voltage charging state for test-pieces. By achieving the skillful coordination among the systems and the uniform operation control by the measurement and control system, the large multifunctional environmental simulator integrates various testing functions of environmental simulations, such as high-altitude, ice-coating, contamination, rain-exposing and other simulations into a whole. Therefore, the invention is widely suitable for the testing process for large multi-parameter environmental simulations.

The invention provides a fluid-dynamic renewable energy harvesting system which includes fluid-foil means for interfacing with a fluid current such as a water current or wind or both, and which includes energy harvesting means utilizing fluid current driven periodic motion of the fluid-foil means for capturing fluid-dynamic renewable energy and converting it into usable energy in a desired form such as electricity. The invention provides devices, methods and systems for harvesting renewable energy for small-scale, medium-scale and large-scale applications, to provide real and substantial benefits towards efficiently fulfilling energy needs while also more broadly serving humanity and our global environment. The various embodiments of the invention provide energy with zero consumption of fossil fuels and zero emissions of greenhouse gases, and some selectively sited embodiments can beneficially counter global warming induced ice melting.

The invention relates to an ice melting method for overhead contact system of an electrified railway and an ice melting system thereof. Major hazards of ice coating of the overhead contact system include accidents that pantograph of electric locomotives can not contact with a contact line to obtain current, contact system brandishes, even falls of piles and collapses, and the like. In the ice melting method and the ice melting system thereof, an upper overhead contact system and a lower overhead contact system are connected in series to form a circuit by a section post, AC or DC ice melting current is input at the head end of the circuit, ice coating thickness and safe ice melting current value are obtained by analyzing meteorological and overhead contact system parameters with an ice coating data processing and control module, and then the ice melting system is controlled to output the ice melting current at the end of the circuit, thus ice is molten by Joule heat generated by the current. In the ice melting method and the ice melting system thereof, ice attached to the contact line is molten by joule heat, and compared with the deicing modes of artificial knock and the like of operation departments, the ice melting method and the ice melting system thereof greatly improve deicing efficiency, thus reducing the effect on railway transport, and eliminating damages of external force on the contact line.

The invention relates to an AC/DC overhead transmission line ice-melting technology which adopts split-phase conductors. When a line needs ice-melting, the load current which is evenly distributed in every split-phase conductor under normal conditions is transferred to one or more split-phase conductors; and when the centralized single conductor has the load current to a certain extent, the ice on the conductor can be melted. The deicing purpose can be realized by adopting the alternate switching manner by melting the ice on other split-phase conductors in sequence. If the manner is adopted before the line is iced, the purpose of line-icing prevention can be achieved.

The invention discloses an automatic ice-melting conductor and ice-melting equipment adopting the same. A conductor body structure is adopted for heating a power supply conductor; the automatic ice-melting conductor adopts a coaxial cable way, and comprises an outer conductor, a heating material and an inner conductor; the ice-melting equipment is directly connected on the inner conductor and the outer conductor of the automatic ice-melting conductor; the heating material is a heating material with a positive temperature coefficient effect, and placed between the inner conductor and the outer conductor for fully isolating the inner conductor from the outer conductor; the automatic ice-melting equipment comprises a transformer, a switch circuit, a microprocessor, a communication module, and an icing sensing module, wherein the microprocessor is connected with the communication module, the icing sensing module and the switch circuit for receiving a control signal from the communication module, transmitting data to the communication module, and receiving data from the icing sensing module; and a control center controls the operation of the automatic ice-melting equipment through the communication module. According to the automatic ice-melting conductor and the ice-melting equipment adopting the same, ice melting is implemented under the control of the control center; an outage condition of a high-voltage power transmission line, and major failure to the line in ice melting can be avoided; and an existing ice-melting technology is greatly improved.

A gutter system with integral snow and ice melting cable which more effectively and efficiently prevents the formation of snow and ice dams. The gutter system comprises an elongated gutter, a gutter cover, and a pair of heating elements. The gutter cover presents a longitudinal axis and includes a rear wall adapted to be affixed to the building, a front wall spaced from the rear wall, and a bottom wall extending between a lower edge of the rear wall and a lower edge of the front wall. The gutter cover substantially covers an open end of the gutter and includes a first panel adapted to be placed over or under roofing material on the roof, a second panel attached to the first panel and adapted to overlie the open end of the gutter, and a water channel attached to the second panel for directing water into the gutter. The heating elements are positioned on a top surface of the bottom wall of the gutter and extend generally parallel to one another and parallel to the longitudinal axis of the gutter for melting snow and ice which accumulates on the gutter cover without requiring heating elements to be positioned on the gutter cover itself. A first one of the heating elements is positioned adjacent the front wall of the gutter and a second one of the heating elements is positioned slightly inboard of the first heating element so that both heating elements are closer to the front wall of the gutter than the rear wall to concentrate heat below the water channel of the gutter cover.

The invention provides an energy stepped system based on pipe network arrangement, flow and temperature potential control and a distribution controlling method, particular to a heat fluid circulating system based on solar heat collection and absorption and heat release by snow and ice melting which applies an energy stepped dual-flow pipe network arrangement mode and an all-weather real-time adjustment mode to roads and other similar building structure bodies. The system and the control method are applied to a linking system of two processes of solar heat collection of the road surface and snow and ice melting in winter, thereby strengthening the internal heat exchange of the road surface, not only ensuring effective collection of solar energy in summer and realizing higher outlet temperature of the circulating fluid, but also achieving rapid smelting of accumulated snow and ice at the middle section of the traffic road surface in winter, improving the condition of the traffic road surface and realizing the maximum utilization rate of energy of a dual-circulating fluid in the processes of heat collection in summer and the heat release in winter.

The invention discloses a prevention and control method for debris flow induced by ice-lake break and an application of the method. The method comprises the steps of determining a flood peak flow threshold of break flood debris flow in combination with topographic and geomorphic characteristic parameters of a drainage basin, rainfall characteristic parameters, inner-source characteristic parameters of the drainage basin, transport capacity of a main river and the like; then judging the stability of a morainic dam body in each calculation area and performing classification of dangerousness based on basic parameters obtained by field investigation, sampling and indoor testing of the morainic dam body; and based on this, determining body shape parameters and a distribution mode of pile structure bodies in the morainic dam body. According to the method and the application, for the situation that sudden ice-lake break caused by buried ice melting in the morainic dam, ice landslides and entry of ice into a lake due to icefall easily forms a giant debris flow disaster, the dam body undercutting speed can be effectively controlled, the break flood discharge time can be prolonged, the peak flow of break flood can be reduced, and the scale of forming the debris flow by the break flood can be reduced, regulated and controlled, so that the risk of causing harm to a downstream zone of the ice lake by the break flood is lowered.

The invention relates to a climate environment simulation test method which comprises the following operation that: an environment simulation cabin is arranged; a sample fed with ultrahigh-voltage power is arranged in the environment simulation cabin; a thermal fog system, a rain spray system, an ice covering system, a wind creating system and an ice melting system are arranged around the sample, and a temperature control system, a pressure regulation system, a test control system and a water source are arranged outside the environment simulation cabin; when the thermal fog environment is simulated, the thermal fog system is controlled to input the rate of steam into the environment simulation cabin; when the rain spraying environment is simulated, the angle that rain drops collide with the surface of the sample is 45 degrees; when the ice covering environment is simulated, the temperature in the environment simulation cabin is controlled, so that water drops are attached on the surface of the sample; when wind environment is simulated, the wind speed of the wind creating system is controlled; and the ice melting environment is simulated, the temperature rise rate near the sample is controlled. The climate environment simulation test method is easy to simulate various climate environments, can be applied in the test research and the product performance test of electric power, traffic, aviation and other fields, and the like.

The invention relates to a unit type high voltage transmission line wire-protection ice-melting method which includes the following steps: A. defining same-phase cracking lead wires (11, 12) of a certain section as a wire-protection ice-melting unit and adopting conductive spacers (90) at the positions of two ends of the unit; B. arranging a wire-protection ice-melting device (100) in the unit, wherein a loop circuit between the two spacers (90) and the cracking lead wires (11,12) are formed by the wire-protection ice-melting current output by the wire-protection ice-melting device (100), thus generating heat so as to realize wire-protection and ice-melting. The wire-protection and ice-melting device includes a wire-protection and ice-melting current control system and a wire-protection and ice-melting power. A corresponding wire-protection and ice-melting current used for heating the cracking lead wires (11, 12) is output by the wire-protection and ice-melting power according to the wire-protection and ice-melting current parameters, so as to realize wire-protection and ice-melting. Compared with the prior art, the method of the invention has the advantages of shortcut power obtaining, low cost, flexible control and good wire-protection and ice-melting effect, etc.

An unmanned aerial vehicle (UAV) melting device, including an unmanned aerial vehicle (UAV), a melting apparatus to melt snow or ice in an area around the UAV melting device; and one or more connecting attachments to couple the UAV to the melting apparatus. The UAV melting device comprises a wireless transceiver, the wireless transceiver to receive operational commands from a user to determine direction of operation and area of coverage of the UAV melting device. The melting apparatus further comprises one or more power sources and one or more heating assemblies.

The invention provides a DC high-current ice-melting device with static reactive-load compensation function, pertaining to the technical field of supporting equipments of high/low voltage power supply/distribution systems. The primary side of a three-winding rectification transformer is merged on a three-phase bus, two secondary sides are respectively connected with the intermediate points of a positive-end three-phase high-voltage high-current controllable silicon valve and a negative-end high-voltage high-current controllable silicon valve; the anodes and cathodes of the two three-phase high-voltage and high-current controllable silicon valves form a 12-pulse rectifier; the anode of the positive-end three-phase high-voltage high-current controllable silicon valve is connected to a DC reactor in series to achieve a positive terminal, and the cathode of the negative-end high-voltage high-current controllable silicon valve forms a negative terminal, a shorting stub is arranged between the positive terminal and the negative terminal. The invention integrates DC high-current ice-melting technology and static reactive-load compensation function, thereby, the device can not only be used as a static reactive-load compensation device, but also be used as a current-controllable DC high-current ice-melting device; as a result, the cost of supporting equipment for low/high voltage supply/distribution system is reduced remarkably, and the utilization ratio of the equipment is largely improved.

The invention discloses an icing prediction and early-warning method of power transmission lines. The method comprises that image information and meteorological parameter information, collected by an unmanned plane, of the power transmission lines are obtained; whether icing occurs in the power transmission lines is determined according to the image information collected by the unmanned plane of the power transmission lines and image information of normal power transmission lines; if icing occurs, the icing thickness is calculated and displayed; according to the image information and meteorological parameter information, collected by an unmanned plane, of the power transmission lines, future icing growth condition of the power transmission lines is predicted, so that ice melting is carried out according to the icing growth condition; whether the meteorological parameter information reaches an early-warning value is determined; and if the meteorological parameter information reaches the early-warning value, the meteorological parameter information is transmitted to an expert system, and the expert system improves the data collection frequency of the unmanned plane. Management staff can know practical onsite conditions of the lines timely through the method, ice melting measures are taken on the basis of foundations, and technical support is provided for decision making in icing disaster rescue.

A snow and ice melting device adapted to rest on a roof; having a flat plate with a series of channels therethrough containing a heating element to heat the flat plate and melt the ice and snow on the roof.

The invention discloses a method for planting sunflowers in serious saline and alkaline land by the sea. The method comprises the following steps: A. preparing land, and constructing strip fields or raised fields; B. irrigating and icing with saline water in winter; C. covering with mulching films; D. sowing seeds; E. managing in the growing period; and F. harvesting when the sunflowers are grown up. According to the invention, through the series measures of arranging land, irrigating and icing with saline water in winter, ice melting and showering by saline water in spring, covering with mulching films for inhibiting saline and preserving soil moisture and the like, the saliferous content of soil at the root layer of the sunflowers is reduced, and the normal development of the sunflowers is ensured; and the method provided by the invention is simple to operate, has low cost, is suitable for being used in saline and alkaline regions by the sea, and has prominent economic, social and ecological benefits.

The invention discloses a planting method of sweet sorghum in coastal server saline-alkali soil. The method comprises the following steps: A, preparing soil, and constructing a strip or platform field; B, irritating with salt water in winter, and icing; C, covering with a plastic film; D, sowing; E, managing in a growing phase; and F, harvesting when the sweet sorghum is ripe. According to the method, by means of a series of measures, such as soil preparation, salt water irrigation and icing in winter, salt water ice melting and showering in spring, plastic film covering to inhibit salt and preserve soil moisture and the like, the salt content of the soil at the root layer of the sweet sorghum is reduced, and the sweet sorghum grows normally. The method is operated simply, has low cost, is applicable to coastal saline-alkali areas to promote development of sugar making and biological energy industries in China, and has remarkable economic, social and ecological benefits.

The invention relates to a direct-current controlling and protecting method for the ice-melting of an ultra high voltage direct current transmission line. For an once connection mode for the ice-melting of two parallel current converters, the control strategies and methods that two current converters at the rectification side are used for setting the electric current, and one of two current converters at the inversion side is used for setting the electric current, and the other one thereof is used for setting the voltage are adopted so as to ensure that an ultra high voltage direct current system can continuously and stably operates in an ice-melting operating mode. The currentration of each current converter at the rectification side is one half of the input ice-melting current instruction value and is one half of the currentration tracing line current measured value of the current converter used for setting the electric current at the inversion side, thereby the even distribution of the direct current between two current converters at the inversion side can be ensured, and the current converter used for setting the voltage at the inversion side is used for controlling the direct-current voltage of the parallel current converters.

A flexible electric heating mat includes a grounding substrate sheet arranged in relation to electrical conductors and resistive elements of an electric heater element so as to provide safe and reliable operation of the mat in environments in which the mat will be subjected to moisture and physical stresses.

The invention discloses a detection method for a current converter trigger control device function. The detection method comprises the following steps of: firstly, establishing a secondary integration dynamic simulation test system; detecting the validity of an interface logic function between an upper-layer control protection system and valve base electronic equipment; detecting the validity of an interface logic function between the valve base electronic equipment and thyristor monitoring equipment; detecting the validity of the trigger function and the protecting and monitoring function of the thyristor monitoring equipment; and simulating a test method that the thyristor is continuously triggered to be conducted in a commutation time sequence on the upper-layer control protection system to detect the validity of the function of the whole current converter trigger control device in a long-time continuous operation mode. With the method, before engineering projects, such as high-voltage direct-current power transmission, static high-voltage dynamic reactive compensation and direct-current ice melting are implemented or in the process that the relevant test researches are carried out, the working performance of the valve base electronic equipment is effectively tested, and the condition that whether the cooperation of the valve base electronic equipment and the control protection equipment under various working conditions satisfies the system design requirement is effectively tested.

The invention discloses a current ice-melting method for overhead ground wires of an electric transmission line. The method mainly includes following steps that by means of ground wire insulators, each of the overhead ground wires is down led in an insulation mode and grounded through grounding knife switches; the overhead ground wires are reliably grounded through the closed grounding knife switches when the electric transmission line is in normal operation; the grounding knife switches break, and the overhead ground wires are to ground insulation during ice melting; and a tail end of an overhead ground wire requiring ice melting is in short circuit with another nearby overhead ground wire or a shutdown transmission line, a starting end of the overhead ground wire requiring ice melting and the another nearby overhead ground wire or the shutdown transmission line are connected with an ice melting power supply to form an ice melting loop to start the ice melting power supply, and ice-melting currents are generated in the ice melting loop and used for working and heating to achieve ice melting. According to the current ice-melting method for the overhead ground wires of the electric transmission line, the ice-melting currents are loaded to the overhead ground wires to heat the overhead ground wires to rise temperatures so that covered ice on the overhead ground wires can be effectively melted.

The invention discloses a supercooled liquid ice slurry continuous preparation device which comprises a refrigeration circulating system and a supercooled water liquid circulating system, wherein the supercooled liquid circulating system comprises a supercooler assembly, a supercooled liquid circulating assembly and an ice storage tank; the supercooler assembly is formed by connecting n supercoolers in parallel; and the refrigeration system comprises a compressor, a condenser, a liquid storage device, a dry filter, an evaporating pressure regulating valve, a master solenoid valve, n throttle control assemblies and n refrigerant flow reversing assemblies. When a certain supercooler is blocked by ice, the valve in the flow channel can be closed, and the refrigerant flow reversing assembly can be adjusted to melt the ice by hot gas produced by the refrigerant; and after the ice barrier is eliminated, the valve can be opened. In the process, the supercoolers in other flow channels still work normally, thereby realizing continuous preparation of ice slurry. The ice melting heat source of the supercoolers is the condensation heat of the refrigerant in the refrigeration system without consuming additional electric energy, thereby reducing the energy consumption of the device.

The invention discloses a method for planting cotton in coastal heavy saline-alkali land. The method comprises the following steps of: A, consolidating land, and building a strip field or a platform field; B, irrigating by using saline water in winter and icing; C covering by using a mulching film; D, sowing; E, performing growth period management; and F, picking in time after cotton bolls are fully cracked and opened. In the method, a series of measures such as land consolidation, icy irrigation of saline water in winter, ice melting spraying of saline water in spring, salt inhibition and soil moisture conservation through mulching film coverage and the like are adopted, so that the salt content of soil in cotton root layers is reduced, and the normal growth of the cotton is ensured; and the method is easy to operate and low in cost, can be applied to coastal saline and alkaline areas, and has remarkable economic, social and ecological benefits.

The method capable of utilizing natural cold source to make ice for desalinating brackish water includes the following steps: A. utilizing winter atmospheric temperature when which reach to below zero deg.C to make brackish water or sea-water in the artificial or natural pool be iced; B. when the ice layer is coagulated to 2-3 cm, water in the bottom portion can be discharged, the water level can be lowered so as to form negative pressure filtration hollow cavity, utilizing temperature difference between day and night to make ice layer be repeatedly molten and frozen; C. using plastic bag to pack ice block and store the ice blocks in icehouse; and D. placing the primarily-desalinated ice block in ice-melting pool whose lower portion is equipped with water-discharging hole, discharging firstly-molten saline ice water and retaining residual desalinated water.