Cross axis wind turbine: Pushing the limit of wind turbine technology with complementary design

Chong, Wen Tong; Muzammil, Wan Khairul; Wong, Kok Hoe; Wang, Chin‐Tsan; Gwani, Mohammed; Chu, Yung-Jeh; Poh, Sin Chew

doi:10.1016/j.apenergy.2017.06.099

Cited by 77 publications

(36 citation statements)

References 62 publications

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“…Wind turbines have been recognized for their potentials to produce clean and inexhaustible energy since the early energy crisis in the 1970s. The dependency on fossil fuel reserves alone has renewed the interest in the development of wind energy devices which emanated from our concern of the impending world economic crisis [15,16]. Before now the HAWT is the only proven technology for the generation of power from wind [17] because the Darrieus VAWT could not compete due to their low efficiency compared to the HAWT until the introduction of the VAWT (Giromill) with variable pitch configuration which has a coefficient of power value comparable to that of the HAWT [15].…”

Section: Literature Reviewmentioning

confidence: 99%

Design and Testing of Building Integrated Hybrid Vertical Axis Wind Turbine

Gwani¹,

Kangiwa²,

Wisdom³

2021

JEEE

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Building integrated wind turbine are considered as part of a group of technologies that are suitable for domestic micro-energy generation. Darrieus and Savonius turbines work efficiently in the urban environment at low wind speed, the Savonius rotor is self-starting and creates high torque but has low efficiency, while the Darrieus rotor is very efficient but does not self-start easily. Thus, the combination of these rotors as hybrid system would help to improve the overall efficiency of the wind turbines. The aim of this paper was to design, fabricate and experimentally investigate the performance of hybrid Vertical Axis Wind Turbine (VAWT) on residential buildings. A building model with gable rooftop was design and fabricated for use in testing of the hybrid VAWT. The height of the hybrid VAWT was paced at Y = 150 mm above the rooftop. The results obtained from the studies showed that the hybrid VAWT mounted on the building rooftop yield up to 63% more energy compared to the bare-hybrid VAWT (without building). Similar improvement in performance of the hybrid VAWT is also observed in the rotational speed, mechanical power and the coefficient of torque, where the building integrated hybrid VAWT outperformed the bare-hybrid VAWT. Thus the results indicate that urban buildings are suitable for the mounting of the hybrid VAWT.

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Section: Literature Reviewmentioning

confidence: 99%

Design and Testing of Building Integrated Hybrid Vertical Axis Wind Turbine

Gwani¹,

Kangiwa²,

Wisdom³

2021

JEEE

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“…The design motivation of the CAWT is to exploit the potential kinetic energy in the vertical component of the slanted airflow by interacting with the upper and lower horizontal blades. This creates a larger virtual swept area than the traditional VAWT, therefore enhancing the rotor's power output and increasing the wind turbine's self‐starting capability 52 …”

Section: Development Status Of Offshore Wind Energy Devicementioning

confidence: 99%

A review on development of offshore wind energy conversion system

Wang

et al. 2020

Int J Energy Res

113

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Summary Wind energy conversion system, aiming to convert mechanical energy of air flow into electrical energy has been widely concerned in recent decades. According to the installation sites, the wind energy conversion system can be divided into land‐based wind conversion system and offshore wind energy conversion (OWEC) system. Compared to land‐based wind energy technology, although OWEC started later, it has attracted more attentions due to its significant advantages in sufficient wind energy, low wind shear, high power output and low land occupancy rate. In this paper, the principle of wind energy conversion and the development status of offshore wind power in the world are briefly introduced at first. And then, the advantages and disadvantages of several offshore wind energy device (OWED), such as horizontal axis OWED, vertical axis OWED and cross axis OWED are compared. Subsequently, several major constraints, such as complex marine environment, deep‐sea power transmission and expensive cost of equipment installation faced by offshore wind conversion technology are presented and comprehensively analysed. Finally, based on the summary and analysis of some emerging technologies and the current situation of offshore wind energy utilization, the development trend of offshore wind power is envisioned. In the future, it is expected to witness multi‐energy complementary, key component optimization and intelligent control strategy for smooth energy generation of offshore wind power systems.

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“…Urban winds include disordered, indirect, and transverse flows due to the existence of many obstacles (i.e., buildings). For this reason, VAWTs are more suitable than horizontal axis turbines for urban conditions [8]. VAWTs are made in various shapes.…”

Section: Symmetry 2019 11 X For Peer Review 2 Of 16mentioning

confidence: 99%

Numerical Investigation of the Savonius Vertical Axis Wind Turbine and Evaluation of the Effect of the Overlap Parameter in Both Horizontal and Vertical Directions on Its Performance

et al. 2019

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Exploiting wind energy, which is a complex process in urban areas, requires turbines suitable for unfavorable weather conditions, in order to trap the wind from different directions; Savonius turbines are suitable for these conditions. In this paper, the effect of overlap ratios and the position of blades on a vertical axis wind turbine is comprehensively investigated and analyzed. For this purpose, two positive and negative overlap situations are first defined along the X-axis and examined at the different tip speed ratios of the blade, while maintaining the size of the external diameter of the rotor, to find the optimum point; then, the same procedure is done along the Y-axis. The finite volume method is used to solve the computational fluid dynamics. Two-dimensional numerical simulations are performed using URANS equations and the sliding mesh method. The turbulence model employed is a realizable K-ε model. According to the values of the dynamic torque and power coefficient, while investigating horizontal and vertical overlaps along the X- and Y-axis, the blades with overlap ratios of HOLR = +0.15 and VOLR = +0.1 show better performances when compared to other corresponding overlaps. Accordingly, the average Cm and Cp improvements are 16% and 7.5%, respectively, compared to the base with a zero overlap ratio.

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Cross axis wind turbine: Pushing the limit of wind turbine technology with complementary design

Cited by 77 publications

References 62 publications

Design and Testing of Building Integrated Hybrid Vertical Axis Wind Turbine

Design and Testing of Building Integrated Hybrid Vertical Axis Wind Turbine

A review on development of offshore wind energy conversion system

Numerical Investigation of the Savonius Vertical Axis Wind Turbine and Evaluation of the Effect of the Overlap Parameter in Both Horizontal and Vertical Directions on Its Performance

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