Structure Optimum Design Based on Maintenance and Lifting Equipment for Wind Turbine

2014 ◽  
Vol 684 ◽  
pp. 273-278 ◽  
Author(s):  
Jia Sun ◽  
Ke Zhang ◽  
Yu Hou Wu
Keyword(s):  
Wind Turbine ◽  
Design Method ◽  
The Self ◽  
Main Design ◽  
Advantages And Disadvantages ◽  
Mechanics Model ◽  
Wind Turbine Tower ◽  
Solid Works ◽  
The Cost ◽  
Lifting Equipment

To meet the urgent demand of maintenance and lifting equipment for wind turbine, combined with designation demand, two kinds of primary structure of the maintenance and lifting equipment has been proposed, analyzed and compared. By means of the Solid Works software the initial design on the two kind of the machine, the self-climbing crane and the trailed hoisting platform, have been conducted, the static analysis has been performed based on the mechanics model, and the advantages and disadvantages of these methods have been pointed out and compared in the paper. Compared with the self-climbing crane, the mechanical structure of the trailed hoisting platform is simpler, the control system presented more reliable, simple, easier realized etc, and the cost is lower. The self-climbing crane is high-automatic, but the design of crane high in the free degree and high in difficulty, and the climbing force focused on the wind turbine tower is too large. Conclusion The trailed hoisting platform is determined as the main design method to design the maintenance and lifting equipment for wind turbine.

Decision-Based Design Method for Computing Marginal Cost of Durability

2020 ◽  
Author(s):  
Felipe M. Pasquali ◽  
Jonatan Meza ◽  
John F. Hall
Keyword(s):  
Wind Turbine ◽  
Marginal Cost ◽  
Business Models ◽  
Formal Method ◽  
Design Method ◽  
New Paradigm ◽  
Wind Turbine Tower ◽  
The Cost ◽  
Decision Based Design ◽  
Product Durability

Abstract Product durability impacts both the environment and the economy. Companies are changing their business models to the circular economy. In this model, the ownership of the product remains with the manufacturer. With this new paradigm, determining the life of the product becomes even more important for the success of the business model. The metric defined as the Marginal Cost of Durability (MCD) determines the cost to increase or decrease the life of the system. For a system to last longer, more materials are needed to counteract the fatigue damage. While this metric has been defined and used in studies throughout the literature, there is a need for a formal method of collecting this data. This paper presents a novel method for measuring the MCD aided by Metamodel-Based Optimization. A case study is presented to demonstrate this method when applied to a wind turbine tower. The results indicate that there is an increasing linear relationship between life and cost. A wind turbine tower designed for 80 years has 34% more mass and cost than a 20-year design.

Offshore and Onshore Wind Energy Conversion: The Potential of a Novel Multiple-Generator Drivetrain

2013 ◽  
Vol 569-570 ◽  
pp. 644-651 ◽  
Author(s):  
Navid Goudarzi ◽  
Wei Dong Zhu
Keyword(s):  
Mathematical Model ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Simple Mathematical Model ◽  
Onshore Wind ◽  
Wind Energy Conversion ◽  
Qualitative And Quantitative ◽  
Advantages And Disadvantages ◽  
The Cost ◽  
Operational Range

A multiple generator drivetrain (MGD), where a single large generator in a wind turbine is replaced by multiple generators with the same or different rated powers, is proposed along with an automatic switch as an alternative to an existing MGD configuration. Qualitative and quantitative comparisons of a MGD with a conventional drivetrain are provided to better understand the advantages and disadvantages of having a MGD in wind turbines. New approaches for improving the efficiency and the reliability, expanding the operational range, and reducing the cost of a wind turbine are mentioned. A simple mathematical model for a MGD with electromagnetic clutches is developed, a novel prototype of a MGD is designed and fabricated, and experiments are conducted on the prototype. It is concluded that a multiple-generator drivetrain with generators operating individually or in parallel has a better potential of improving the efficiency and the reliability, expanding the operational range, and reducing the cost of offshore and onshore wind turbines than the existing MGD configuration.

Automatic Design Method of Wind Turbine Tower and it’s Application

2010 ◽  
Vol 139-141 ◽  
pp. 1277-1280
Author(s):  
Dong Hai Su ◽  
Mei Yan Zhang ◽  
Tie Qiang Ma ◽  
Xiao Qiu Han ◽  
Chuan Zong Sun ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Design Method ◽  
Engineering Application ◽  
Design System ◽  
Automatic Design ◽  
Design Efficiency ◽  
Cycle Times ◽  
Wind Turbine Tower ◽  
System Effectiveness ◽  
Parameters Calculation

In order to solve the engineering application problems of parametric rapidly in design of wind turbine tower, an automatic design method of wind turbine tower is put forward first, and the automatic design model was built through analyzing the key parameters and parameters’ calculation relation in different cases: same taper tower design and variable taper tower design. The key parameters, height, diameter and wall thickness of the tower, are mainly considered. Then, an automatic design system of the wind turbine tower is developed and realized according to the model. Finally, the system effectiveness is verified through taking a wind turbine for example. The results show that the system can enhance the design efficiency and shorten the cycle times at the same time.

General Structure Configuration and Parametric Design Method of Wind Turbine Tower

2012 ◽  
Vol 487 ◽  
pp. 588-592
Author(s):  
Zhen Yun Duan ◽  
Xiao Jiao Liu ◽  
Tie Qiang Ma
Keyword(s):  
Wind Turbine ◽  
Parametric Design ◽  
Design Method ◽  
General Structure ◽  
3D Design ◽  
Wind Turbine Tower ◽  
Relation Model ◽  
Tower Model ◽  
Structure Configuration ◽  
Parameter Relation

In order to improve the design efficiency of wind turbine tower, a design method which combines configuration and parametric design is proposed, the general structure model of wind turbine tower is given, and the parameter relation model of tower components is established. Based on skeleton and coordinate system coincident method, the automatic assembly of 3D tower model is realized. An automated 3D design software system of wind turbine tower is built by the API of Pro/E. The validity of the system is proved by wind turbine SUT-1500.

scholarly journals Examination of Savonius VAWT Blade Made of Stainless Steel and Aluminum using Ansys

2020 ◽  
Vol 9 (3) ◽  
pp. 1370-1377
Keyword(s):  
Stainless Steel ◽  
Wind Turbine ◽  
Modal Analysis ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Modeling Software ◽  
Solid Works ◽  
The Cost ◽  
Aluminum Material ◽  
Ansys Workbench

This paper studies roof mounted savonius type Vertical Axis Wind Turbine systems with the goal of maximizing the efficiency and reducing the cost. The efficiency of the wind turbine depends on the material, shape and angle of the blade. So material plays an important role in the design of wind turbine. In this paper, Stainless Steel and Aluminum material are used to design savonius wind blades of 1 m height and 0.5 m chord length with 4 different arc radii. Modeling software Solid Works is used to model savonius wind blade and static structural and modal analysis of the Stainless Steel and Aluminum blades are done by using ANSYS Workbench software

A Circuit Model for Lightning Surge of Wind Turbine Tower with an Internal Conductor

2015 ◽  
Vol 135 (3) ◽  
pp. 200-206 ◽  
Author(s):  
Yoki Ikeda ◽  
Naoto Nagaoka ◽  
Yoshihiro Baba
Keyword(s):  
Wind Turbine ◽  
Circuit Model ◽  
Wind Turbine Tower

Main approaches to estimating the cost of shareholder equity of oil and gas producers

2020 ◽  
Vol 26 (3) ◽  
pp. 685-697
Author(s):  
O.V. Shimko
Keyword(s):  
Oil And Gas ◽  
Oil Prices ◽  
Minimum Cost ◽  
Free Cash Flow ◽  
Annual Reports ◽  
Comparative Approach ◽  
Economic Activities ◽  
Advantages And Disadvantages ◽  
Oil And Gas Producers ◽  
The Cost

Subject. The study analyzes generally accepted approaches to assessing the value of companies on the basis of financial statement data of ExxonMobil, Chevron, ConocoPhillips, Occidental Petroleum, Devon Energy, Anadarko Petroleum, EOG Resources, Apache, Marathon Oil, Imperial Oil, Suncor Energy, Husky Energy, Canadian Natural Resources, Royal Dutch Shell, Gazprom, Rosneft, LUKOIL, and others, for 1999—2018. Objectives. The aim is to determine the specifics of using the methods of cost, DFC, and comparative approaches to assessing the value of share capital of oil and gas companies. Methods. The study employs methods of statistical analysis and generalization of materials of scientific articles and official annual reports on the results of financial and economic activities of the largest public oil and gas corporations. Results. Based on the results of a comprehensive analysis, I identified advantages and disadvantages of standard approaches to assessing the value of oil and gas producers. Conclusions. The paper describes pros and cons of the said approaches. For instance, the cost approach is acceptable for assessing the minimum cost of small companies in the industry. The DFC-based approach complicates the reliability of medium-term forecasts for oil prices due to fluctuations in oil prices inherent in the industry, on which the net profit and free cash flow of companies depend to a large extent. The comparative approach enables to quickly determine the range of possible value of the corporation based on transactions data and current market situation.

Classification of the factors forming the cost of the web-site

2017 ◽  
Vol 31 (2) ◽  
pp. 82-89
Author(s):  
E. S. Epifanov
Keyword(s):  
Web Site ◽  
Internet Site ◽  
Advantages And Disadvantages ◽  
Major Factors ◽  
The Cost ◽  
The Web

This article presents a classification of major factors that shape the cost of Internet site. Also discusses the limitations in determining the objectives of the web site; advantages and disadvantages of different factors.

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