Wind Energy Technology — The State of the Art

Author(s):  
David Milborrow
Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2041
Author(s):  
Manisha Sawant ◽  
Sameer Thakare ◽  
A. Prabhakara Rao ◽  
Andrés E. Feijóo-Lorenzo ◽  
Neeraj Dhanraj Bokde

For decades of wind energy technology developments, much research on the subject has been carried out, and this has given rise to many works encompassing different topics related to it. As a logical consequence of such a research and editorial activity, state-of-the-art review works have also been published, reporting about a wide variety of research proposals. Review works are particularly interesting documents for researchers because they try to gather different research works on the same topic present their achievements to researchers. They act, in a way, as a guidance for researchers to quickly access the most meaningful works. The proposal of this paper consists of going one step further, and to present a review of state-of-the-art review works on wind-energy-related issues. A classification into several main topics in the field of energy research has been done, and review works that can be classified in all these areas have been searched, analyzed, and commented on throughout the paper.


Wind Energy ◽  
10.1002/we.82 ◽  
2003 ◽  
Vol 6 (1) ◽  
pp. 35-52 ◽  
Author(s):  
Andrew R. Henderson ◽  
Colin Morgan ◽  
Bernie Smith ◽  
Hans C. Sørensen ◽  
Rebecca J. Barthelmie ◽  
...  

Fluids ◽  
2021 ◽  
Vol 6 (8) ◽  
pp. 288
Author(s):  
Stefan Heinz ◽  
Joachim Peinke ◽  
Bernhard Stoevesandt

The availability of reliable and efficient turbulent flow simulation methods is highly beneficial for wind energy and aerospace developments. However, existing simulation methods suffer from significant shortcomings. In particular, the most promising methods (hybrid RANS-LES methods) face divergent developments over decades, there is a significant waste of resources and opportunities. It is very likely that this development will continue as long as there is little awareness of conceptional differences of hybrid methods and their implications. The main purpose of this paper is to contribute to such clarification by identifying a basic requirement for the proper functioning of hybrid RANS-LES methods: a physically correct communication of RANS and LES modes. The state of the art of continuous eddy simulations (CES) methods (which include the required mode communication) is described and requirements for further developments are presented.


Author(s):  
Paolo Pennacchi ◽  
Pietro Borghesani ◽  
Steven Chatterton ◽  
Candas Gultekin

Wind energy conversion is the fastest growing source of electricity generation in the world among the other renewable energy production technologies. Whereas investment costs have decreased over years, operational and maintenance costs of wind turbines are still high, thus attracting the focus of researchers and industrial operators. Classical maintenance techniques, i.e.: run-to-failure and scheduled-preventive maintenance, are still dominant in this sector; however, condition monitoring has gained space in the wind turbine market and new diagnostic methods and techniques are continuously being proposed. Condition monitoring techniques seem the most effective tools to minimize operational and maintenance costs and reduce downtimes by early detection of faults. This paper is aimed at reviewing the state of the art of condition monitoring for horizontal axis wind turbines. After a brief introduction presenting the current trends in the market of wind energy, the paper reviews the most common failure modes of wind turbines and the traditional approach to maintenance. The core of this study details the state of the art in the field of system architectures, sensors and signal processing techniques for the diagnostic of faults in wind turbine components. Finally, some general conclusions are drawn on the overall trends in the field of condition monitoring of wind turbines.


1982 ◽  
Vol 104 (4) ◽  
pp. 913-920
Author(s):  
D. R. Goff ◽  
J. F. Gardner ◽  
D. A. Maxfield

As advanced processes are used commercially for converting coal to other forms of energy, reliable valves will be required for operating in lockhopper service at pressures to 1200 psig (8.3 MPa) and temperatures to 1600°F (870°C). The Department of Energy’s Lockhopper Valve Testing and Development Project, being conducted at the Morgantown Energy Technology Center (METC), is cooperating with lockhopper valve manufacturers and users to improve the state-of-the-art capability of commercially available lockhopper valves. The test facilities and valve testing program currently being made available to valve manufacturers at METC are described. The performance of test valves currently in the program is summarized and design considerations for solids lockhopper service are discussed.


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