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Energies, Volume 14, Issue 7

April-1 2021 - 238 articles

Cover Story: Power converters in wind turbines exhibit frequent failures—the causes of which have remained unexplained for years. Pronounced seasonal failure patterns point to environmental influences, in particular to humidity, as a critical stressor and likely driver of converter failure. This paper summarizes the results of field-measurement campaigns in 31 wind turbines of seven different manufacturers spread over three continents. The temperature and humidity conditions inside the converter cabinets are characterized, related to the environmental conditions and the operation of the turbines. Their analysis reveals remarkable relations with the failure behavior. View this paper.
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Articles (238)

  • Article
  • Open Access
6 Citations
3,479 Views
30 Pages

Numerical Investigation of the Influence of the Drill String Vibration Cyclic Loads on the Development of the Wellbore Natural Fracture

  • Arnaud Regis Kamgue Lenwoue,
  • Jingen Deng,
  • Yongcun Feng,
  • Haitao Li,
  • Adefarati Oloruntoba,
  • Naomie Beolle Songwe Selabi,
  • Micheal Marembo and
  • Yuanxiu Sun

6 April 2021

Wellbore instability is one of the most serious issues faced in the drilling process. During drilling operations, the cyclic loads applied on the fractured formation progressively modify the initial parameters (i.e., length and width) of the fracture...

  • Article
  • Open Access
4 Citations
4,387 Views
18 Pages

Component-in-the-Loop Testing of Automotive Powertrains Featuring All-Wheel-Drive

  • Ilya Kulikov,
  • Sergey Korkin,
  • Andrey Kozlov,
  • Alexey Terenchenko,
  • Kirill Karpukhin and
  • Ulugbek Azimov

6 April 2021

The article is dedicated to the methodology of designing component-in-the-loop (CiL) testing systems for automotive powertrains featuring several drivelines, including variants with individually driven axles or wheels. The methodical part begins with...

  • Review
  • Open Access
61 Citations
9,338 Views
25 Pages

Cleaning of Floating Photovoltaic Systems: A Critical Review on Approaches from Technical and Economic Perspectives

  • Rafi Zahedi,
  • Parisa Ranjbaran,
  • Gevork B. Gharehpetian,
  • Fazel Mohammadi and
  • Roya Ahmadiahangar

6 April 2021

There are some environmental factors, such as ambient temperature, dust, etc., which cause a reduction in the efficiency of Photovoltaic (PV) systems. Installation of PV panels on the water surface, commonly known as Floating Photovoltaic (FPV) syste...

  • Article
  • Open Access
7 Citations
3,786 Views
10 Pages

Analysis of the Possibility of Disinfecting Surfaces Using Portable Foggers in the Era of the SARS-CoV-2 Epidemic

  • Marek Ochowiak,
  • Andżelika Krupińska,
  • Sylwia Włodarczak,
  • Magdalena Matuszak,
  • Szymon Woziwodzki and
  • Tomasz Szulc

6 April 2021

The SARS-CoV-2 pandemic has resulted in the need for increased surface disinfection. For this purpose, biocides, UV-C radiation, or ozonation can be used. The most commonly used are biocides that can be deposited on the surface with the use of variou...

  • Review
  • Open Access
44 Citations
6,475 Views
23 Pages

AC Microgrid Protection System Design Challenges—A Practical Experience

  • Sarat Chandra Vegunta,
  • Michael J. Higginson,
  • Yashar E. Kenarangui,
  • George Tsai Li,
  • David W. Zabel,
  • Mohammad Tasdighi and
  • Azadeh Shadman

6 April 2021

Alternating current (AC) microgrids are the next step in the evolution of the electricity distribution systems. They can operate in a grid-tied or island mode. Depending on the services they are designed to offer, their grid-tied or island modes coul...

  • Article
  • Open Access
3 Citations
3,802 Views
24 Pages

Experimental Investigation of the Movement of an Offshore Floating Platform in Straight Wind, Tornadic Wind, and Downburst Conditions

  • Sarah Nichol,
  • Rupp Carriveau,
  • Lindsay Miller,
  • D. S-K. Ting,
  • Djordje Romanic,
  • Adrian Costache and
  • Horia Hangan

6 April 2021

There is growing interest in multi-purpose offshore floating platforms that: harvest energy from the sun, wind, water, and waves; desalinize water; host agriculture and aquaculture; and house residents. While there are some basic commonalities with w...

  • Article
  • Open Access
2 Citations
2,964 Views
14 Pages

6 April 2021

Since 2014, Taiwan has promoted a 1% annual electricity saving target to promote electrical efficiency efforts. As the industrial sector accounts for approximately 60% of the overall electricity consumption of Taiwan, this sector presents the greates...

  • Article
  • Open Access
4 Citations
3,100 Views
24 Pages

6 April 2021

Near-wall microenvironment of a building refers to parameters such as wind speed, temperature, relative humidity, solar radiation near the building’s façade, etc. The distribution of these parameters on the building façade shows a certain variation b...

  • Article
  • Open Access
4 Citations
3,103 Views
14 Pages

6 April 2021

Development of underground coal mines is reflected in increasing lengths of transport routes between shafts and workplaces. This is not an issue in terms of transportation of materials or groups of people, because suspended railways are efficient, sa...

  • Review
  • Open Access
95 Citations
12,853 Views
37 Pages

Metadata Schemas and Ontologies for Building Energy Applications: A Critical Review and Use Case Analysis

  • Marco Pritoni,
  • Drew Paine,
  • Gabriel Fierro,
  • Cory Mosiman,
  • Michael Poplawski,
  • Avijit Saha,
  • Joel Bender and
  • Jessica Granderson

6 April 2021

Digital and intelligent buildings are critical to realizing efficient building energy operations and a smart grid. With the increasing digitalization of processes throughout the life cycle of buildings, data exchanged between stakeholders and between...

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Energies - ISSN 1996-1073Creative Common CC BY license