Effects of hostile terrains on wind turbine performances and loads: The Acqua Spruzza experience

Botta, G.; Cavaliere, M.; Viani, S.; Pospı́šil, Stanislav

doi:10.1016/s0167-6105(98)00038-5

Cited by 20 publications

(13 citation statements)

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“…These sites often have strong wind resources, yet designing wind farms for these regions involves additional challenges due to the changes imposed by the terrain on the threedimensional structure of the wind, such as speed-up regions, changes to the wind shear profile, large vertical wind velocities, and modification of turbulence characteristics (Walmsley and Taylor, 1996;Botta et al, 1998). As a result, the essential prediction of on-site wind conditions, often estimated from measurements at a limited number of mast locations, also becomes more challenging.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reynolds number and inflow parameters on mean and turbulent flow over complex topography

et al. 2016

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Abstract.A characterization of mean and turbulent flow behaviour over complex topography was conducted using a large-scale (1 : 25) model in the WindEEE Dome at Western University. The specific topographic feature considered was the Bolund Hill escarpment facing westerly winds. A total of eight unique inflow conditions were tested in order to isolate the impact of key parameters such as Reynolds number, inflow shear profile, and effective roughness, on flow behaviour over the escarpment.The results show that the mean flow behaviour was generally not affected by the Reynolds number; however, a slight increase in speed-up over the escarpment was observed for cases with lower inflow roughness. The shape of the inflow wind shear profile also had a minor impact on the mean flow near the escarpment. More significant effects were observed in the turbulent flow behaviour, where the turbulent kinetic energy (TKE) over the escarpment was found be a strong function of inflow roughness and a weak function of the Reynolds number. The local change in the inflow wind shear was found to have the most significant influence on the TKE magnitude, which more closely approximated the full-scale TKE data, a result which had not been previously observed in wind tunnel modelling of this topography.

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Section: Introductionmentioning

confidence: 99%

Effect of Reynolds number and inflow parameters on mean and turbulent flow over complex topography

et al. 2016

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“…Table 1 shows the Weibull parameters of the wind characteristics gathered from non-commercial weather observation reports of 32 sites located at Uganda [7], Italy [8], Finland [9], Hong Kong [10] and Oman [11]. Table 2 shows the specifications of 20 different wind turbines collected by G. Botta et al [12], R. Pallabazzer [5] and the author. It should be emphasized that all these data are randomly gathered from different sources and have no relative correlations.…”

Section: Resultsmentioning

confidence: 99%

“…Then the estimated power output of the jth turbine installed at the ith site is designated as P ij avg , and can be calculated according to Eq. (12). If the power output demand per turbine is given as P obj , then the turbine-site pair with P ij avg which is the closest to P obj would make the most suitable choice.…”

Section: Pairing Performancementioning

confidence: 99%

Performance evaluation of pairing between sites and wind turbines

Cheng

2007

Renewable Energy

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“…The icing blades turn to the sun to get more heat. This method can alleviate the slight icing, but it is not useful for extreme icing . However, this technical design is complicated and has not been applied to blade deicing and may also damage the blade when it is frequently turned to the sun.…”

Section: Anti‐ice System and De‐icing Systemmentioning

confidence: 99%

“…Using the physical properties of the blade to de-ice, the blade has sufficient flexibility to break the ice after its own bending. 91 But the ice with bending rupture has great kinetic energy and may have safety problems. The research information of this technology is relatively small.…”

Section: Flexible Bladementioning

confidence: 99%

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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Effects of hostile terrains on wind turbine performances and loads: The Acqua Spruzza experience

Cited by 20 publications

References 1 publication

Effect of Reynolds number and inflow parameters on mean and turbulent flow over complex topography

Effect of Reynolds number and inflow parameters on mean and turbulent flow over complex topography

Performance evaluation of pairing between sites and wind turbines

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

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