Anti-icing method of carbon crystal and wind power generator anti-icing system employing method

Abstract

The invention relates to an anti-icing method of a carbon crystal and a wind power generator anti-icing system employing the method. The method comprises the steps of printing the nanosized conductive carbon crystal on a carrier surface, preparing a thinner carbon crystal electric hot plate with two electrodes by a curing technology and a hot-pressing technology, taking one out of layers forming a blade as a heating layer, dividing the heating layer into a plurality of heating zones, arranging on-line temperature monitoring in each heating zone, performing temperature rising control with power units in corresponding zones in a heating control cabinet, and keeping the surface temperature of zones to be heated higher than and approximate to 0 DEG C. The anti-icing control system controls the heating zones in a simultaneous or alternant operation mode, and conducts on-line automatic ice prevention or ice melting. According to the method and the wind power generator anti-icing system, since the carbon crystal electric hot plate is adopted as an electric heating material of an anti-icing blade, the manufacturing technology is simple, and the heating is uniform and controllable; and since the surface adopts an on-line temperature monitoring closed-loop control mode, the anti-icing operation is stable, safe, and energy-saving.

Description

technical field [0001] The invention relates to a method for preventing the surface of outdoor equipment from icing, and in particular to a method for electrically heating anti-icing or melting ice of a wind generator using a carbon crystal heating material and an anti-icing system for a wind generator using the method, belonging to Wind power equipment technical field. Background technique [0002] In the winter of 2012, in my country, some wind farms in the south stopped operating for more than two months due to the freezing of wind turbine blades, causing serious power loss; The blades of wind turbines are icy, and the operation is out of service for up to 3 months every year. Some wind field blades are icy too thick, and wind turbines collapse. The icing of wind turbine blades is a worldwide problem that needs to be solved urgently. The development and utilization of some high-quality wind resources in severe cold areas has become a technical bottleneck hindering the deve...

AI Technical Summary

Problems solved by technology

[0002] In the winter of 2012, in my country, some wind farms in the south stopped operating for more than two months due to the freezing of wind turbine blades, causing serious power loss; The blades of wind turbines are icy, and the operation is out of service for up to 3 months every year. Some wind field blades are icy too thick, and wind turbines collapse. The icing of wind turbine blades is a worldwide problem that needs to be solved urgently. The development and utilization of some high-quality wind resources in severe cold areas has become a technical bottleneck hindering the development of the wind power industry.

[0003] Chinese Invention Patent Application Publication No. CN 102878036 A discloses a wind turbine rotor blade with an electrothermal deicing device, which is attached to the surface, inner surface and interlayer of the blade. The material of the fan blade is generally poor Thermally conductive composite material, the ice-melting device includes a thermal insulation layer, an electric heating element and an insulating layer. The electric heating element includes an electric heating chip of a zinc-nickel-nickel alloy low-temperature soft wire or a nickel-chromium alloy electric heating wire or a chromium-aluminum alloy electric heating wire. Heat generation, the heat is concentrated in the inner core, which can easily cause local overheating inside or on the surface of the blade, resulting in a waste of energy. There is no online temperature monitoring during the heating process, which belongs to the open-loop control method. The local high temperature of the blade has a hidden danger of fire. The thickness of the ice-melting device is 2mm-4mm, and the insulation and heat dissipation layer is PVC engineering plastic. It is easy to fall off when attached to the surface of the blade, and it will reduce the structural force of the blade when attached to the inner surface and interlayer of the blade; the blade is in a general freezing environment. Under certain conditions, the anti-icing or ice-melting needs to consume a lot of power in the running state, and the maximum power set in the description of the invention is only 400W / m 2， , during the rotation of the blades to generate electricity, the convective heat loss is the main form of blade melting, and the convective heat loss at the tip of the blade is the largest. To maintain the surface temperature near the tip of the blade above 0 degrees Celsius without freezing, the energy consumption that needs to be provided exceeds 1000W / m 2 , it can be seen that this patent is out of reality, and it is difficult to achieve the effect of online ice melting

[0004] Chinese utility model patent 201220245659.X discloses an automatic anti-icing and deicing device for fan blades, which uses conductive paint or conductive film on the surface of the blades, which tends to fall off when heated during use and is not convenient for partition control. Patent description The infrared temperature measuring element is used to dynamically measure the surface temperature of a certain position on the leeward side and the windward side of the blade, which cannot represent the temperature of the entire blade. At the same time, the infrared temperature measuring element is easily damaged in the freezing environment outside, and the measurement error is large. , low reliability, it is difficult to achieve the purpose of anti-icing of the fan blades

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