Characteristics of ice accretions on blade of the straight-bladed vertical axis wind turbine rotating at low tip speed ratio

Li, Yan; Wang, Shaolong; Liu, Qindong; Feng, Fang; Tagawa, Kotaro

doi:10.1016/j.coldregions.2017.09.001

Cited by 37 publications

(28 citation statements)

References 11 publications

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“…The thickness of ice increases with icing time and the ice shape does not change. The icing area gradually 12, the ice accretes on a small part of windward surface and a large part of leeward surface of blades, for both models, and their icing shapes are similar. To evaluate the icing shapes of different scale models, the icing shapes were unified into the same coordinate system as shown in Figure 8.…”

Section: Test Planmentioning

confidence: 89%

“…According to the previous research, the ice mainly accretes on the blade surface of wind turbines [8][9][10]. This will affect the aerodynamic and load distribution, which will decrease the power performance and threaten the safety of wind turbines [11][12][13]. Therefore, it is essential to research ice accretion on blade surfaces of wind turbines [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Scaling Method of the Rotating Blade of a Wind Turbine for a Rime Ice Wind Tunnel Test

Sun

Jiang

et al. 2019

Energies

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In order to research the law of rime ice accretion on different scaling blades surface, a new rime ice scaling method was proposed in this research. According to previous research, there are three kinds of ice types on blade surfaces: rime ice, glaze ice and mixed ice. Under the condition of rime ice, both the freezing fraction and the coefficient of heat transfer between super-cold water droplets and blade are 100%. The heat transfer model of rime ice is simpler than that of glaze ice and mixed ice. In this research, the scaling parameters including flow field, water droplets, temperature, pressure and rotating parameters were defined. The Weber number (We) based on water film thickness as an important parameter was applied in this study. The rotating parameters including rotating speed and radius had been added into the icing scaling method. To verify the effectiveness of the new rime ice scaling method, icing wind tunnel tests were carried out. The NACA0018 airfoil was used for the test blade. Two kinds of scale chord blades were selected, the chord of full-scale blade was 200 mm and of subscale blade was 100 mm. The test temperature was −15 °C. The ice accretion on different scale blades surface were captured by high-speed camera and the icing shapes of different scaling blades were obtained. To quantitatively analyze the similar degree of icing shapes on different scale blades, an evaluation method which included similar degree (Sim) was established based on the typical characteristic parameters proposed by previous research. The results show that the icing shapes of subscale blades are similar to that of full-scale blades. The similar degree is between 75.22% and 93.01%. The icing wind tunnel test indicates that the new rime ice scaling method is an effective method to study the rime ice of large scale rotating blades. This study can be used as a reference for research on anti-icing and de-icing technologies for large-scale HAWTs (Horizontal Axis Wind Turbines).

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Section: Test Planmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Scaling Method of the Rotating Blade of a Wind Turbine for a Rime Ice Wind Tunnel Test

Sun

Jiang

et al. 2019

Energies

Self Cite

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“…Figure 10(b) shows the surface icing of the VAWT blade under operating conditions. 51 It can be seen from the figure that the blade is completely covered by ice accretion and the thickness of the ice coating becomes thicker as the operating time of the fan increases. The increase in wind speed causes the ice coating on the surface of the blade to gather more toward the trailing edge of the blade, making the blade section look longer.…”

Section: Ice Coating Of Different Types Of Fan Bladesmentioning

confidence: 95%

“…(a) Ice coating at different angles of attack with the blade at rest; (b) ice coating at different wind speeds during blade operation within 30 minutes…”

Section: Effect Of Icing On the Performance Of Wind Turbinesmentioning

confidence: 96%

“…It can be seen from the figure that the ice accretion is mainly distributed near the windward side of the blade, and the blade is not completely covered by the accumulated ice, and the distribution of the surface ice of the blade mainly depends on the angle of attack. Figure 10(b) shows the surface icing of the VAWT blade under operating conditions . It can be seen from the figure that the blade is completely covered by ice accretion and the thickness of the ice coating becomes thicker as the operating time of the fan increases.…”

Section: Effect Of Icing On the Performance Of Wind Turbinesmentioning

confidence: 99%

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A review on ice detection technology and ice elimination technology for wind turbine

et al. 2019

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Blade icing can affect wind turbines to generate electricity. In severe cases, 30% of power generation is lost in a year, and safety problems in the vicinity of wind power plants are also caused. Researchers have designed anti-icing and de-icing technologies to reduce these effects, and excellent ice-detecting devices are a prerequisite for using anti-icing and de-icing technologies. Ultrasonic attenuation technology can effectively and reliably detect the presence of ice without affecting the aerodynamic performance of the blade, providing a reliable guarantee for anti-icing and de-icing systems. Deicing and anti-icing systems are divided into active and passive, active heating blades are still the most effective anti-icing and de-icing methods, but their energy consumption is too high. Although there are many existing de-icing methods, there are not many practical uses. This article introduces them separately and lists their advantages and disadvantages. The use of ultrasonic anti-icing and de-icing is an economical and reliable means that has been proven to be used for anti-icing and de-icing of blades. However, under normal circumstances, a single anti-icing de-icing system cannot completely solve the problem of icing of the blades. This paper suggests using both ultrasonic and hydrophobic coatings to cope with more icing conditions. K E Y W O R D Santi-icing and deicing technology, fan blade, hydrophobic coating, ice detection technology, ultrasonic deicing | INTRODUCTIONWith the rapid development of the world economy, lots of countries are increasingly demanding energy resources. Owing to release a lot of greenhouse gases, chemicals and toxins substances from the combustion of the fossil fuels such as coal and oil, 1 People began to look for renewable energy to provide energy consumption, such as wind energy, 2-4 hydrogen energy, 5-7 solar energy, 8-10 biogas and biomass energy. 11-15 With the wind power growing rapidly, generate electricity by using wind turbines is economical and environmentally friendly. 16 As can be seen in Figure 1, China's total installed capacity of wind turbines in 2016 is much higher than in other countries.China has the largest wind power market in the country, and the installed capacity of wind power is growing steadily year by year. The high density of air is conducive to the development of wind energy resources in cold regions. Figure 2 shows wind resource changes in different seasons. The wind speed from June to August is significantly lower than other months. There are also data showing that wind resources in cold regions are 10% higher than other regions. 17,18

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Micro‐Scale Ice Shoveling Effect Induced by Magnetic‐Responsive Microfins

Chen,

Liu,

Zhou

et al. 2024

Advanced Science

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Icing is ubiquitous in nature and engineering applications, and imposes threats to road and air transportations, wind energy infrastructures, etc. However, current active de‐icing solutions, especially the most popular one, i.e., heating, suffer from high energy consumption whilst passive methods are often ineffective at high‐speed, long‐term, or large‐particle conditions. Herein, a promising strategy adopting magnetic‐responsive microfins (MRS) featuring reversible deformations is developed for de‐icing. A novel micro‐scale ice shoveling effect induced by the localized destruction of the ice adhesion interface owing to the inhomogeneous deformation is demonstrated, and its dependence on the ice particle size and temperature is investigated. An analytical model is proposed to describe the mechanism of this effect, showing a linear relation between the position of the magnet and the induced force agreeing well with experiments, leading to a system straightforward to predict and control. Specifically, the de‐icing capacity of the surface becomes prominent when small‐scale ice particles merge to large ones, providing a promising solution for applications on aircraft, wind turbines, etc., as the first of its kind to remove large particles under high‐speed conditions effectively.

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Characteristics of ice accretions on blade of the straight-bladed vertical axis wind turbine rotating at low tip speed ratio

Cited by 37 publications

References 11 publications

Scaling Method of the Rotating Blade of a Wind Turbine for a Rime Ice Wind Tunnel Test

Scaling Method of the Rotating Blade of a Wind Turbine for a Rime Ice Wind Tunnel Test

A review on ice detection technology and ice elimination technology for wind turbine

Micro‐Scale Ice Shoveling Effect Induced by Magnetic‐Responsive Microfins

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