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Enhancing Smart Grid Resiliency
Published in Clark W. Gellings, Smart Grid Planning and Implementation, 2020
Icephobicity is the ability of a surface to facilitate the removal of ice or slow down its formation. When water comes in contact with a surface temperature below freezing, ice may form. In the case of overhead conductors, if enough ice forms, the mechanical load from the ice and prevailing wind may result in a mechanical failure. With insulators, the ice may bridge all the sheds, and although ice is a relatively good insulator, flashovers can result when it melts.
Nature and Prospective Applications of Ultra-Smooth Anti-Ice Coatings in Wind Turbines
Published in Ranjusha Rajagopalan, Avinash Balakrishnan, Innovations in Engineered Porous Materials for Energy Generation and Storage Applications, 2018
Hitesh Nanda, P.N.V. Harinath, Sachin Bramhe, Thanu Subramanian, Deepu Surendran, Vinayak Sabane, M.B. Nagaprakash, Rishikesh Karande, Alok Singh, Avinash Balakrishnan
There has been debate whether the mechanisms of ice and water can be related while constructing superhydrophobic surfaces into icephobic. It is assumed that by lowering the surface energy and increasing the water contact angle, icephobicity can be achieved. But the mechanisms related to surface adhesion of water and ice differs because water cannot withstand shear stress but can support pressure or tensile compression. Thus, to understand superhydrophobic surfaces and their icephobic characteristics, it is essential to comprehend mechanical forces which affect ice and liquid droplets. Figure 10 shows the ice adhesion values for different material categories. It has been shown that ice adhesion increases as the receding contact angle decreases on smooth surfaces.
Icephobicity studies of superhydrophobic coating on aluminium
Published in Surface Engineering, 2021
Xinyu Tan, Man Wang, Yiteng Tu, Ting Xiao, Sarah Alzuabi, Peng Xiang, Runhua Guo, Xiaobo Chen
Freezing of outdoor equipment has become severe problems due to the formation and accretion of ice. Severe impacts on economy and life safety have been caused by icing on power lines, roads, aircraft wings, wind turbines and other infrastructure components [1–4]. Aluminum (Al) and its alloys are widely used in various industries, due to their attractive properties including low weight, good stability and high toughness. However, acid rain can corrode the metal substrate and icy rain can cause serious ice accretion on Al construction. Icephobicity has been suggested to delay or reduce the accumulation of ice on the surface by keeping the surface of the substrate as water-free as possible and lowering the adhesion between ice crystals and substrate [2,5]. Superhydrophobic (SHP) surfaces are favoured in icephobicity due to their water-repelling and self-cleaning properties [6–8].
Nanotextured Aluminum-Based Surfaces with Icephobic Properties
Published in Heat Transfer Engineering, 2020
Michael Grizen, Tanmoy Maitra, Jeremy P. Bradley, Manish K. Tiwari
In this study, we followed a scalable process to prepare aluminum based nanotextured surfaces for anti-icing application. Nucleation temperature measurements were used to evaluate the icephobicity of the surfaces. In addition, drop impact tests at room temperature were used to assess the impalement resistance and dynamic stability of the surfaces. Overall, our results provide a rational approach to engineer aluminum-based icephobic surfaces and provide preliminary assessments of the icephobic behavior. Future works will concentrate on ice adhesion and impact tests in supercooled conditions.