TY - JOUR
T1 - Performance enhancements on vertical axis wind turbines using flow augmentation systems
T2 - A review
AU - Wong, Kok Hoe
AU - Chong, Wen Tong
AU - Sukiman, Nazatul Liana
AU - Poh, Sin Chew
AU - Shiah, Yui Chuin
AU - Wang, Chin Tsan
N1 - Funding Information:
The authors would like to thank the University of Malaya for the research grant allocated under Postgraduate Research Grant (PG150-2016A) and RU Grant (RU018G-2016). Special appreciation is also credited to the Ministry of Higher Education Malaysia (MOHE) for the research grant (Prototype Research Grant Scheme, PRGS – PR005-2016).
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017
Y1 - 2017
N2 - There are many advantages of vertical axis wind turbines (VAWTs) compared with horizontal axis wind turbines (HAWTs). Research has shown that VAWTs are more suitable for turbulent wind flow and urban applications. However, the efficiency and low self-start ability of VAWTs are always the main drawbacks especially for the lift-type VAWTs. Unlike HAWTs, the rotor blades for VAWTs do not always provide positive torque during operation. Many innovative designs have been implemented to improve the performance of VAWTs, and this includes different configurations and blade profiles. This paper extensively reviews various flow augmentation systems and attempts to provide information to researchers on current augmentation techniques and other relevant research. The flow augmentation system is able to increase the coefficient of power, CP, hence improving the output power of different types of VAWTs. Some augmentation systems are able to increase the maximum power output by up to 910%. The methods and designs used to increase upwind velocity and to reduce negative torque created on the wind turbine have been discussed in detail. Additionally, the flow augmentation devices that are integrated with building structures are also reported in this paper.
AB - There are many advantages of vertical axis wind turbines (VAWTs) compared with horizontal axis wind turbines (HAWTs). Research has shown that VAWTs are more suitable for turbulent wind flow and urban applications. However, the efficiency and low self-start ability of VAWTs are always the main drawbacks especially for the lift-type VAWTs. Unlike HAWTs, the rotor blades for VAWTs do not always provide positive torque during operation. Many innovative designs have been implemented to improve the performance of VAWTs, and this includes different configurations and blade profiles. This paper extensively reviews various flow augmentation systems and attempts to provide information to researchers on current augmentation techniques and other relevant research. The flow augmentation system is able to increase the coefficient of power, CP, hence improving the output power of different types of VAWTs. Some augmentation systems are able to increase the maximum power output by up to 910%. The methods and designs used to increase upwind velocity and to reduce negative torque created on the wind turbine have been discussed in detail. Additionally, the flow augmentation devices that are integrated with building structures are also reported in this paper.
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U2 - 10.1016/j.rser.2017.01.160
DO - 10.1016/j.rser.2017.01.160
M3 - Review article
AN - SCOPUS:85011965452
SN - 1364-0321
VL - 73
SP - 904
EP - 921
JO - Renewable and Sustainable Energy Reviews
JF - Renewable and Sustainable Energy Reviews
ER -