Rahul Yadav

Bio: Rahul Yadav is an academic researcher from Army Institute of Technology, Pune. The author has contributed to research in topics: Turbine blade & Turbine. The author has an hindex of 1, co-authored 4 publications receiving 2 citations.

Ice extraction from wind turbine using flow of hot air through blade

Abstract: In this paper high the ice accumulated on the wind turbine blade is removed by passing hot air through the blade. The hollow tubes are embedded in the wind turbine blades. The hollow tubes may be circular on cross section or of any suitable shape. The air is heated by an electrical heating or by gas geyser. First the air is compressed with help of a compressor. Then that air is passed through the electric heater or gas heater. The hot air is then passed through the wind turbine blade. When the hot air is passed through the wind turbine blade, the ice melts and falls down. Hot air is passed through the wind turbine blade after frequent intervals of time when the environmental conditions are favorable for icing. The process of deicing is fast.

Infrastructure and resources for transition to EVs as main mode of transportation

Abstract: India has taken a policy decision to move over to electric vehicles as the major mode of transportation in the country by the year 2030. This paper presents a review of the areas which the planning for introducing EVs on a large scale needs to cover. Specific aspects relating to the different areas like power generation, distribution, manufacturing, service, recycling, human resource training, financing is covered in brief. Possible initiatives to be taken bythe government to meet the planned objectives are also indicated.

Ice elimination from wind turbine blade using induction heating

Abstract: In this paper high frequency induction heating is used for deicing the wind turbine blade. Copper coils are embedded in the blade. To one coil high frequency supply is given. Another coil is shorted. The heat is generated in the coil due to induction principle. The wind turbine blade is heated. Due to heat the ice accumulated on the blade is melted and is removed. There is a good control on the amount of heat production in the blade. Due to coil the strength of the blade is also increased.

Wind turbine model testing using all side fans arrangement to create turbulence

Abstract: This Paper is related to the production of artificial turbulence in the test set up. I in this test set up the impact of turbulence intensity on the flicker initiated in the wind turbine output can be studied. In this test set up the blower fans are fitted on all sides of the test set up. The speed of each fan can be controlled with help of a speed regulator. The wind turbine model is kept in the test set up. The desired blower fans are started. The speed of the wind turbine is measured with help of the anemometer provided. The direction of the wind can be observed with help of the smoke gun provided. The output voltage waveform can be observed on the digital storage oscilloscope. The impact of turbulence on the flicker initiated in the turbine output voltage can be observed. Swiveling wheels are provided to the test set up. So the test set up is mobile and can be moves easily in the laboratory.

Author Correction: Smart low interfacial toughness coatings for on-demand de-icing without melting

Abstract: Abstract Ice accretion causes problems in vital industries and has been addressed over the past decades with either passive or active de-icing systems. This work presents a smart, hybrid (passive and active) de-icing system through the combination of a low interfacial toughness coating, printed circuit board heaters, and an ice-detecting microwave sensor. The coating’s interfacial toughness with ice is found to be temperature dependent and can be modulated using the embedded heaters. Accordingly, de-icing is realized without melting the interface. The synergistic combination of the low interfacial toughness coating and periodic heaters results in a greater de-icing power density than a full-coverage heater system. The hybrid de-icing system also shows durability towards repeated icing/de-icing, mechanical abrasion, outdoor exposure, and chemical contamination. A non-contact planar microwave resonator sensor is additionally designed and implemented to precisely detect the presence or absence of water or ice on the surface while operating beneath the coating, further enhancing the system’s energy efficiency. Scalability of the smart coating is demonstrated using large (up to 1 m) iced interfaces. Overall, the smart hybrid system designed here offers a paradigm shift in de-icing that can efficiently render a surface ice-free without the need for energetically expensive interface melting.

Numerical Study of Lightning Protection of Wind Turbine Blade with De-Icing Electrical Heating System

Abstract: In order to solve the problem of icing on the surface of wind turbine blade, a heating system that includes a carbon fiber net (CFN) and power cables is proposed recently. When lightning strikes at the blade with a de-icing heating system, the blade and its heating system are more easily damaged due to the overvoltage between the lightning protection system (LPS) of the blade and the heating system. In this paper, the models of a wind turbine blade with the de-icing heating system are established by Alternative Transients Program/Electromagnetic Transients Program (ATP–EMTP) and the accuracy of models is verified through an experiment. With these models, the influence of lightning current, surge protective devices (SPDs) and earthing resistance of wind turbine are analyzed by calculating the voltage between the down-conductor of the LPS and the heating system. The results show that the voltage is positively correlated with lightning current amplitude and negatively correlated with the front time of lightning current. SPDs are quite useful to reduce the voltage, and an optimal installation scheme of SPDs is obtained by simulation. It is noted that voltage decreases slightly with the increasing earthing resistance with the optimal installation scheme of SPDs.