Windbreaks working as barriers to high speed winds for protection of electric power transmission lines and towers

Severino, Carlos; Matsumoto, Edson; Liu, Guijun; Labaki, Lucila Chebel; Leone, Marcos; Barbosa, Paulo Sérgio Franco; Vatavuk, Paulo; Camargo, Rogério Pereira de; Forti, Tiago

doi:10.1016/j.engfailanal.2017.06.042

Cited by 8 publications

(2 citation statements)

References 1 publication

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“…Therefore, an inappropriate system can lead to important consequences in dry regions [27]. As stated earlier, in addition to using windbreaks for controlling evaporation, erosion, and agriculture, they can be used in livestock and industrial and power plant installations as protection against wind velocity [28][29][30][31]. Extensive studies have been conducted in this regard.…”

Section: Introductionmentioning

confidence: 99%

Using Windbreaks for Decreasing Lake and Reservoir Evaporation: A Case Study from Iran

Monfared¹,

Rezapour²,

Zhian³

2019

Pol. J. Environ. Stud.

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Evaporation from reservoirs is an important issue frequently occurring in dry, hot regions like Iran. Since the laboratory and field studies of evaporation control are difficult, time-consuming, and costly, and the investigation of various possible modes is not possible, numerical models with high capabilities are widely used to analyze the hydrological processes. This article aimed to investigate the effect of windbreaks on reducing evaporation of lakes and reservoirs in dry areas and determine the most optimal location and layout of windbreaks using the FLUENT model. Initial investigations showed that wind is the most important factor of evaporation in the Chahnimeh Region of Sistan, Iran. The results showed that if solid windbreaks with 25% casement (height of 2 and distance of 66 m) are vertically installed in a northwesterly direction, evaporation can be effectively reduced. Although the use of wind breaks in Chahnimeh can help significantly reduce evaporation, it cannot be fully controlled. That is why diagonal windbreaks with 30, 45, and 60º were designed to integrate the windbreaks with other evaporation control methods such as solar panels. The results showed that 60º had the greatest amount of evaporation reduction and were integrated with other methods to control evaporation.

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Section: Introductionmentioning

confidence: 99%

Using Windbreaks for Decreasing Lake and Reservoir Evaporation: A Case Study from Iran

Monfared¹,

Rezapour²,

Zhian³

2019

Pol. J. Environ. Stud.

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“…Barbosa et a1. [22] proposed a methodology for the reduction of faults in transmission tower-line system under high-speed wind events and gusts, including a safety analysis and recommendations for corrective maintenance. The above researchers mainly focused on either angle steel tower or the steel tube tower, while towers consisted of both steel tubes and angel steels were less investigated.…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Wind‐Induced Dynamic Response of Power Towers and Four‐Circuit Transmission Tower‐Line System

Zhang

Wang

2018

Shock and Vibration

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Only one wind field model loading the transmission tower or the tower-line system was investigated in the previous studies, while the influence of two different wind field models was not considered. In addition, only one sample of the wind speed random process was used in the past numerical simulations, and the multiple dynamic response statistical analysis should be carried out. In this paper, statistical analysis of the wind-induced dynamic response of single towers and the transmission tower-line system is performed with the improved accuracy. A finite element model of the transmission tower-line system (the tower consisted of both steel tubes and angel steels) is established by ANSYS software. The analysis was performed by three statistical methods. The effects of the length of the time history and of the number of samples were investigated. The frequency histograms of samples follow the Gaussian distribution. The characteristic statistical parameters of samples were random. The displacements and the axial forces of the low tower are larger than those of the high tower. Two wind field models were applied to simulate the wind speed time history. In field 1 model, Davenport wind speed spectrum and Shiotani coherence function were applied, while in field 2 model Kaimal wind speed spectrum and Davenport coherence function were used. The results indicate that wind field 1 is calmer than wind field 2. The displacements and the axial forces of the tower-line system are less than those of single towers, which indicate damping of wind-induced vibrations by the transmission line. An extended dynamic response statistical analysis should be carried out for the transmission tower-line system.

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The design of tall windbreak panels: Design issues and a case study

Maraveas

2019

ce papers

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The design and construction of tall, slender steel structures always presents a challenge. This paper presents design aspects (structural system information, analysis methods, applied loads and cost optimisation) and a case study relating to the design and construction of tall windbreak panels 10 m in height. These windbreak panels were constructed in a Greek electricity-producing industry in order to reduce wind turbulence and improve the performance of its Air Cooled Condenser (ACC). The steel columns were constructed from hot-rolled IPE 360 cross sections with a height of 10 m, supported by cables in the wind direction and bracing systems in the transverse direction. Concrete anchorages for the cables and concrete footings for the steel columns were used. System optimisation in terms of the steel weight, cable weight and overall costs is discussed and practical issues are explained in terms of technical decisions. Furthermore, construction details, construction methods and cost estimation are discussed.

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Windbreaks working as barriers to high speed winds for protection of electric power transmission lines and towers

Cited by 8 publications

References 1 publication

Using Windbreaks for Decreasing Lake and Reservoir Evaporation: A Case Study from Iran

Using Windbreaks for Decreasing Lake and Reservoir Evaporation: A Case Study from Iran

Statistical Analysis of Wind‐Induced Dynamic Response of Power Towers and Four‐Circuit Transmission Tower‐Line System

The design of tall windbreak panels: Design issues and a case study

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