Results 91 to 100 of about 355,955 (343)

Combining the Pitcher and Lotus Plant: Supericephobic and Superhydrophobic Silicone Films

Advanced Science, EarlyView.
Based on bench‐top nanomolding of polydimethylsiloxane (PDMS) with optimized silicone oil content, we developed hierarchically structured silicone films by essentially combining the properties of the lotus and pitcher plant; particularly we are able to achieve water contact angle as high as 171° and ice adhesion strength as low as 11.5 kPa (i.e ...
Cliff L. W. Ng, Joshua Ham, Sanpreet Kaur, Clayton W. Schultz, Hua‐Zhong Yu   +4 more
wiley   +1 more source

Outstanding 1200 °C Oxidation Resistance in a Novel Multi‐Principal Element Alloy via Lattice Distortion‐Induced Diffusion Suppression

Advanced Science, EarlyView.
The unique lamellar structure of the eutectic alloy promotes selective oxidation of Al initially, while lattice distortion‐induced diffusion suppression slows oxide growth during steady state. Combining these strategies, a Multi‐Principal Element Alloy with excellent oxidation resistance at 1200℃ was designed.
Xinyu Zhang, Weiyan Lv, Xinguang Wang, Chuanmin Jia, Yizhou Zhou, Keqiang Qiu, Jianqiang Wang   +6 more
wiley   +1 more source

Output Power Smoothing Control for a Wind Farm Based on the Allocation of Wind Turbines

Applied Sciences, 2018
This paper presents a new output power smoothing control strategy for a wind farm based on the allocation of wind turbines. The wind turbines in the wind farm are divided into control wind turbines (CWT) and power wind turbines (PWT), separately.
Ying Zhu, Haixiang Zang, Lexiang Cheng, Shengyu Gao   +3 more
doaj   +1 more source

A review of numerical modelling of multi-scale wind turbines and their environment [PDF]

, 2018
Global demand for energy continues to increase rapidly, due to economic and population growth, especially for increasing market economies. These lead to challenges and worries about energy security that can increase as more users need more energy ...
Aquino, Angelo I., Calautit, John Kaiser, Calautit, Katrina, Hughes, Ben Richard, Jomehzadeh, Fatemeh, Nejat, Payam   +5 more
core   +4 more sources

In‐Wheel Piezoelectric DC Power Generator With Zero Resistive Torque

Advanced Science, EarlyView.
In this paper, we present a wheel‐shaped direct‐current piezoelectric generator (DC‐PG) that fundamentally overcomes these constraints by producing phase‐stable DC electricity directly from rolling motion. By embedding this system into suitcase wheels, we demonstrated a fully integrated real‐time location tracking system powered solely by mechanical ...
Hyun Soo Kim, Hyunseok Song, In Woo Oh, Dong‐Gyu Lee, Tae Kyoung Yoon, Jeyeon Lee, Byoung Jin Yoon, So‐Min Song, Iman M. Imani, Seohyun Cho, Seong Jin Kim, Chong‐Yun Kang, Sahn Nahm, Yong Seok Park, Kyung‐Hoon Cho, Jungho Ryu, Jeong Min Baik, Jun Chen, Sunghoon Hur, Hyun‐Cheol Song   +19 more
wiley   +1 more source

WIND TURBINES FOR WIND POWER INSTALLATIONS

Problems of the Regional Energetics, 2008
The problem of wind turbine choice for wind power stations is examined in this paper. It is shown by comparison of parameters and characteristics of wind turbines, that for existing modes and speeds of wind in territory of Republic of Moldova it is ...
Barladean A.S.
doaj  

Commercial Small-Scale Horizontal and Vertical Wind Turbines: A Comprehensive Review of Geometry, Materials, Costs and Performance

Energies
The effective exploitation of renewable energy sources is one of the most effective solutions to counter the energy, environmental and economic problems associated with the use of fossil fuels.
Antonio Rosato, Achille Perrotta, Luigi Maffei   +2 more
doaj   +1 more source

Experimental Vibration Analysis of a Small Scale Vertical Wind Energy System for Residential Use

Machines, 2019
In the recent years, distributed energy production has been one of the main research topics about renewable energies. The decentralization of electric production from wind resources raises the issues of reducing the size of generators, from the MW scale ...
Francesco Castellani, Davide Astolfi, Mauro Peppoloni, Francesco Natili, Daniele Buttà, Alexander Hirschl   +5 more
doaj   +1 more source

Control based power smoothing for aggregated vertical axis wind turbines [PDF]

, 2012
Recently there has been renewed interest in the potential of vertical axis wind turbines (VAWTs), particularly, at very large scale of 10 MW or above owing to their structural simplicity.
Leithead, William, Soraghan, Conaill Eoin, Yue, Hong   +2 more
core  

Learning curves and changing product attributes: the case of wind turbines [PDF]

, 2006
The heuristic concept of learning curves describes cost reductions as a function of cumulative production. A study of the Liberty shipbuilders suggested that product quality and production scale are other relevant factors that affect costs.
Coulomb, Louis, Neuhoff, Karsten
core   +2 more sources