Ice extraction from wind turbine using flow of hot air through blade
01 Aug 2017-
TL;DR: In this paper, the ice accumulated on the wind turbine blade is removed by passing hot air through the blade, the ice melts and falls down, and the process of deicing is fast.
Abstract: In this paper high the ice accumulated on the wind turbine blade is removed by passing hot air through the blade. The hollow tubes are embedded in the wind turbine blades. The hollow tubes may be circular on cross section or of any suitable shape. The air is heated by an electrical heating or by gas geyser. First the air is compressed with help of a compressor. Then that air is passed through the electric heater or gas heater. The hot air is then passed through the wind turbine blade. When the hot air is passed through the wind turbine blade, the ice melts and falls down. Hot air is passed through the wind turbine blade after frequent intervals of time when the environmental conditions are favorable for icing. The process of deicing is fast.
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TL;DR: In this article , the authors presented a smart, hybrid (passive and active) de-icing system through the combination of a low interfacial toughness coating, printed circuit board heaters, and an ice-detecting microwave sensor.
Abstract: Abstract Ice accretion causes problems in vital industries and has been addressed over the past decades with either passive or active de-icing systems. This work presents a smart, hybrid (passive and active) de-icing system through the combination of a low interfacial toughness coating, printed circuit board heaters, and an ice-detecting microwave sensor. The coating’s interfacial toughness with ice is found to be temperature dependent and can be modulated using the embedded heaters. Accordingly, de-icing is realized without melting the interface. The synergistic combination of the low interfacial toughness coating and periodic heaters results in a greater de-icing power density than a full-coverage heater system. The hybrid de-icing system also shows durability towards repeated icing/de-icing, mechanical abrasion, outdoor exposure, and chemical contamination. A non-contact planar microwave resonator sensor is additionally designed and implemented to precisely detect the presence or absence of water or ice on the surface while operating beneath the coating, further enhancing the system’s energy efficiency. Scalability of the smart coating is demonstrated using large (up to 1 m) iced interfaces. Overall, the smart hybrid system designed here offers a paradigm shift in de-icing that can efficiently render a surface ice-free without the need for energetically expensive interface melting.
13 citations
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References
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24 Mar 2014
TL;DR: In this paper, an empirical model of flicker initiated in a wind turbine sited on a hill is established, which offers ins and outs of impact of various shapes of hills on vertical wind shear and consequently on the flicker produced in the wind turbine which is sited in that surface.
Abstract: In the paper empirical model of flicker initiated in a wind turbine sited on a hill is established. Paper offers ins and outs of impact of various shapes of hills on vertical wind shear and consequently on the flicker produced in the wind turbine which is sited on that surface. In the model vertical wind shear, length of the turbine blade, tower height, slope of the hill are reverberated. The exquisiteness of the model is that, it is expedient to sundry types of hills on which the turbine is sited. Postulations, boundary curbs and limitations of the model are also depicted.
27 citations
06 Mar 2014
TL;DR: In this article, the impact of river bank environment on vertical wind shear and subsequently on flicker in wind turbine which is sited on that surface was revealed in a laboratory wind tunnel with artificial surfaces created in a wind tunnel.
Abstract: The paper reveals niceties of impact of river bank environment on vertical wind shear and subsequently on flicker in wind turbine which is sited on that surface. This is accomplished in a laboratory wind tunnel with artificial surfaces created in a wind tunnel. The various surfaces imitated in the wind tunnel are river sand, various sizes of pebbles of river bank, flowing water of river at high speed, flowing water of river at low speed etc. Wind turbine is tested for these sundry kinds of surface roughness. Here emphasis is given on establishment of empirical model of flicker initiated owing to vertical wind shear instigated because of sundry surface roughness of river bank topography. Values of flicker with projected empirical model and flicker from wind tunnel test are closer.
27 citations
12 Mar 2014
TL;DR: In this paper flicker is computed with linear approach considering impact of vertical wind shear, turbine blade length and tower height and mathematical model to compute the flickers is developed using these parameters.
Abstract: Use of wind energy is increased day by day. Power quality is one of the prime issues. Computation of flicker is very necessary to improve the quality of wind power generation. In this paper flicker is computed with linear approach. Vertical wind shear has major impact on the production of the flicker in wind generation. Computation of flicker in this paper is carried out considering impact of vertical wind shear. Other parameters considered for computation of flicker are turbine blade length and tower height. Mathematical model to compute the flicker is developed using these parameters. Validation of the model is also done.
27 citations
26 Aug 2010
TL;DR: In this article, a static straight blade used for the straight-bladed vertical axis wind turbine by using a simple icing wind tunnel was observed and recorded under different wind speeds and flow discharges of a water spray nozzle.
Abstract: Icing on blade surface of the wind turbine set in cold regions is a serious problem. To invest the mechanism of icing and ice accretion on blade surface, wind tunnel tests were carried out on a static straight blade used for the straight-bladed vertical axis wind turbine by using a simple icing wind tunnel. The icing and ice accretions on blade surface at some typical attack angles were observed and recorded under different wind speeds and flow discharges of a water spray nozzle set in the wind tunnel outlet. The maximum icing thickness on the leading edge and trailing edge of blade surface were also measured and compared. Based on the test results, the factors affecting the icing and ice accretion on the static straight blade surface for wind turbine were discussed.
25 citations
24 Mar 2014
TL;DR: In this paper, a newfangled empirical model was proposed to figure, flicker, instigated in the horizontal axis, upwind turbine, due to vertical wind shear, in continuous operation.
Abstract: Paper confers a newfangled empirical model to figure, flicker, instigated in the horizontal axis, upwind turbine, due to vertical wind shear, in continuous operation. Postulations, boundary curbs and limitations of the model are also depicted. In the proposed model, vertical wind shear, number of blades, blade length and tower height are echoed. The elegance of the model is that, it is expedient to range of heights of buildings on which the turbine is sited. Substantiation of model is carried out with comparative graphs revealed after fervent experimentation on a turbine in a tunnel with various heights of models of buildings.
23 citations