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143 results on '"Chong, W.T."'

37. Application of adaptive neuro-fuzzy methodology for performance investigation of a power-augmented vertical axis wind turbine

Author

Wan Khairul Muzammil Abd Rahim, Chong, W.T., Gwani, M., Shamshirband, S., Tan, C.J., A. Fazlizan, Poh, S.C., Dalibor Petković, Wong, K.H., Wan Khairul Muzammil Abd Rahim, Chong, W.T., Gwani, M., Shamshirband, S., Tan, C.J., A. Fazlizan, Poh, S.C., Dalibor Petković, and Wong, K.H.

Abstract

Wind power is generating a lot of interest in many countries as a way to produce sustainable and low-cost electrical power. Since the power in the wind is known to be proportional to the cubic power of the wind velocity approaching the wind turbine, this means that any slight increase in wind speed can lead to a substantial increment in the energy output. Power augmentation device is an interesting option in this respect. The aim of this study is to determine the accuracy of a soft computing technique on the rotational speed estimation of a Sistan rotor vertical axis wind turbine with PAGV (power-augmentation-guide-vane) based upon a series of measurements. An ANFIS (adaptive neuro-fuzzy inference system) was used to predict the wind turbine rotational speed. The ANFIS network was developed with three neurons in the input layer, and one neuron in the output layer. The inputs for the network were time (t), wind velocity (v) and presence of the PAGV (0 with PAGV and 1 without PAGV). The precision of ANFIS technique was assessed against the experimental results using RMSE (root-mean-square error) and coefficient of determination (R2).

Published
2016

44. Design and Early Development of a Novel Cross Axis Wind Turbine.

Author

Muzammil, W.K., Wong, K.H., Chong, W.T., Gwani, M., Wang, C.T., Poh, S.C., and Wang, X.H.

Abstract

A novel cross axis wind turbine (CAWT) which comprises of a cross axis blades arrangement was presented and investigated experimentally. The CAWT is a new type of wind turbine that extracts wind energy from airflows coming from the horizontal and vertical directions. The wind turbine consists of three vertical blades and six horizontal blades arranged in a cross axis orientation. Hubs in the middle of the CAWT link the horizontal and vertical blades through connectors to form the CAWT. The study used a 45° deflector to guide the oncoming airflow upward (vertical wind direction). The results from the study showed that the CAWT produced significant improvement in power output and rotational speed performance compared to a conventional straight-bladed vertical axis wind turbine (VAWT), where the CAWT C Pmax is 2.5 times higher than the C Pmax produced by the VAWT for the same wind speed of 4.5 m/s. [ABSTRACT FROM AUTHOR]

Published
2016
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