The effect of surface waves on the hydrodynamic performance of a marine current turbine (MCT) is studied using the unsteady BEM method. The calculation are found to be in a very good agreement with experimental results of a small scale MCT. It is shown that a large amplitude wave, but still a long wave can affect the time-averaged coefficient of power and also introduce non-linearity in the time response of the turbine particularly at low tip speed ratio. This can have consequence for an effective control of the turbine. Instantaneous blade loading and power spectra are given and analyzed. © 2016 IEEE.

Nithya Venkatesan

Electrical

School of Electrical Engineering

Chennai Campus

Abdus Samad

Ai K

Avital E.J

Korakianitis T

Samad A

Aerospace engineering

Boundary element method

Tidal power

Turbines

Turbomachine blades

blade loading

Coefficient of power

HYDRODYNAMIC PERFORMANCE

LARGE AMPLITUDE WAVES

LOW TIP SPEED RATIOS

MARINE CURRENT TURBINES

Modelling and analysis

TIDAL ENERGY

Surface waves

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

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Surface wave effect on marine current turbine, modelling and analysis

Proceedings of 2016 7th International Conference on Mechanical and Aerospace Engineering, ICMAE 2016

Energy efficient generation from renewable energy sources is of major concern nowadays. A horizontal axis marine current turbine (HAMCT) of diameter 1.9 m is modelled using the blade element momentum (BEM) scheme and the turbine output parameters are given as an input to the electrical system for a tip speed ratio (TSR) of 5 and a power coefficient of 0.4. The design aspects of a buck-boost converter with proportional integral (PI) and sliding mode controller (SMC) is investigated for HAMCT system, with the highest power output of about 15.6 kW for a water velocity of 3 m/s. A comparison between PI controller and SMC are analyzed for the tidal turbine conversion system to obtain the desired output voltage with high efficiency is discussed here. The dynamic variation on load side to be controlled with dual loop controller to regulate the output voltage and to optimize the input current. In this paper performance and resemblance of control techniques which include sliding mode controller and PI controller are analysed with step and bode plot response. The system is designed for an output voltage range of 0.38 kV to 2.4 kV which is suitable for DC microgrids. The performance of HAMCT coupled with PMSG and the power converter with a controller is modelled and designed under MATLAB/SIMULINK environment. © 2019 The Authors. Published by Elsevier Ltd.

Fulltext

Energy Procedia

A performance analysis of tidal turbine conversion system based on control strategies

The hydrodynamic performance of a dual-rotor horizontal axis marine turbine (HAMCT) is investigated for the power gain in operating the rear rotor without blade-pitch control. This kind of turbine can be advantageous for a rectilinear tidal current of reversing directions, where each rotor blade is optimally fixed-pitched towards its upstream velocity. The blade element momentum (BEM) method is coupled with the Park wake model. A generic three-blade turbine is shown to gain up to 20% in the coefficient of power CP as relative to the front rotor CP when operating the rear rotor at the same tip speed ratio (TSR) as the front one, gaining overall CP up to 0.55. Analytic model is derived to backup the estimate of power gain. Plots for turbine performance variation with TSR and profile hydrodynamic efficiency are given, and analysed for lab and small-medium size turbines.

International Journal of Engineering & Technology

Hydrodynamic Assessment of a Dual-Rotor Horizontal Axis Marine Current Turbine

54th AIAA Aerospace Sciences Meeting

Flow Seperation and Passive Flow Control on E387 Airfoil

Renewable Energy

Numerical simulation of a marine current turbine in free surface flow

Quantifying wave and yaw effects on a scale tidal stream turbine

International Journal of Marine Energy

The influence of surface gravity waves on marine current turbine performance

The effect of surface waves on the performance characteristics of a model tidal turbine

Journal	Data powered by TypesetProceedings of 2016 7th International Conference on Mechanical and Aerospace Engineering, ICMAE 2016
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open Access	No