The Performance of Shrouded Wind Turbine at Low Wind Speed Condition

Riyanto, Riyanto; Pambudi, Nugroho Agung; Febriyanto, Rusdi; Wibowo, Kukuh Mukti; Setyawan, Nova Dany; Wardani, Nyenyep Sri; Saw, Lip Huat; Rudiyanto, Bayu

doi:10.1016/j.egypro.2019.01.086

Cited by 12 publications

(4 citation statements)

References 12 publications

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“…They have a similar finding to Khamlaj and Rumpfkeil, whereby the inlet enhances the diffuser-augmented wind turbine by decreasing the pressure coefficient and increasing the wind velocity. A similar observation was also obtained by Riyanto et al 15 who instead performed a wind tunnel testing for the related experiment. Another flow analysis carried out by Jafari and Kosasih 16 revealed that subatmospheric back pressure is the most crucial factor in power augmentation which is mainly affected by the diffuser's area ratio.…”

supporting

confidence: 85%

Performance evaluation of a downwind diffuser on vertical axis wind turbine

Wang

Wong

Chong

et al. 2021

Intl J of Energy Research

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Research has proven that the performance of a horizontal axis wind turbine (HAWTs) can be increased significantly by the application of a diffuser. It serves as a power augmented feature to draw higher wind flow toward the HAWT. However, research on integrating a diffuser onto vertical axis wind turbines (VAWTs) is scant, where most of the available power augmentation devices used for VAWTs are the convergent duct, deflector plate, shroud, and guide vanes which are placed in a proper configuration at the upwind. In this paper, laboratory tests and computational simulations have been carried out to study the impacts of a downwind diffuser on the performance of a VAWT. The diffuser is designed with the absence of a concentrator or flange and is placed downwind of the VAWT. Parametric computational fluid dynamics (CFD) studies were carried out for the downwind diffuser length and semi-opening angle. A five-bladed H-rotor was selected as the testing wind turbine, whereas the diffuser used was made up of flat plates. Both simulations and experiment results are consistent. From the experiments, it was found that a downwind diffuser increases the VAWT performance remarkably. The diffuseraugmented VAWT produced an increment in the maximum coefficient of power of 31.42% at the TSR 0.65 to 0.75. Moreover, the diffuser induced a better self-start ability on the VAWT. The simulation showed that the flow field at the diffuser promotes a flow expansion which created a lower-pressure region at downstream that accelerates the wind toward the VAWT, hence increasing the turbine performance significantly.

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supporting

confidence: 85%

Performance evaluation of a downwind diffuser on vertical axis wind turbine

Wang

Wong

Chong

et al. 2021

Intl J of Energy Research

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“…The results of this case show an enhancement in the maximum power coefficient to be 0.347, which is improved by 36.2 % compared to the third case "inducer and connecting ring", and 43.26 % to the bare turbine. The diffuser could increase the turbine output by reducing the pressure at the wind turbine exit then the mass flow and the produced power efficiency of the wind turbine increased [4], [9].…”

Section: Resultsmentioning

confidence: 99%

“…Riyanto et al [9] investigated the performance of a horizontal wind turbine using a diffuser of two different geometries: without an inlet shroud (L:D = 0.25) and with an inlet shroud (L:D = 0.39). Low wind speed (1-5 m/s) from a wind tunnel is used to perform the test on the wind turbine.…”

Section: Introductionmentioning

confidence: 99%

Effect of Shroud Components on the Performance of a Small Horizontal Axis Wind Turbine

Abo Elyamin,

Bassily

2024

Journal of Advanced Engineering Trends

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“…El aprovechamiento de la energía del viento mediante turbinas eólicas presenta hoy en día una amplia variedad de opciones como lo son las turbinas tradicionales de eje vertical y horizontal, así como otras alternativas entre las que se pueden mencionar los postes oscilantes (El-Shahat, Hasan, & Wu, 2018); turbinas tipo tornillo (Jang, Kim, Hwang, Paek, Kim, & Baek, 2019); turbinas con una única superficie (Aouini, 2012); turbinas de eje horizontal que utilizan cilindros en vez de aspas (Richmond-Navarro, Calderon-Munoz, LeBoeuf, & Castillo, 2017); turbinas que aprovechan la convección debida a diferencias de temperatura (Watanabe, Fukutomi, Ohya, & Uchida, 2020), y turbinas con concentradores de flujo, las cuales alcanzan altos coeficientes de potencia (Keramat Siavash, Najafi, Tavakkoli Hashjin, Ghobadian, & Mahmoodi, 2020), pueden operar flotando en el agua (Zhu, Sueyoshi, Hu, & Yoshida, 2019), ofrecen beneficios de incremento de potencia en sistemas multirotor (Yuji, & Koichi, 2019) y aumentan la eficiencia aun en condiciones de baja velocidad de viento (Riyanto et al, 2019).…”

Section: Introductionunclassified

Efecto de un difusor tipo wind lens en flujo turbulento

2021

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El objetivo fue medir el efecto de un concentrador de flujo tipo wind lens en el caso de flujo turbulento. El estudio se realizó en el túnel de viento de capa límite del Instituto de Investigación en Mecánica Aplicada de la Universidad de Kyushu, Japón, entre marzo y mayo de 2019. Se utilizó un anemómetro de hilo caliente con un mecanismo móvil para realizar tres pruebas. Primero se mide la velocidad en el eje del túnel, sin la rejilla de turbulencia instalada. En segundo lugar, se coloca la rejilla y se mide la intensidad de turbulencia en el eje del túnel de viento. En tercer lugar, se determina el efecto del WL en la velocidad del viento incidente, a diferentes niveles de intensidad de turbulencia. La velocidad del viento en el túnel sin la rejilla de turbulencia es casi constante, alrededor de 9.6 m/s. Al colocar la rejilla se registró en el eje del túnel de viento una intensidad de turbulencia decreciente, desde un valor de 28.6 % a 500 mm de la rejilla, hasta un 5 % de intensidad de turbulencia a 3 100 mm de la rejilla. Cuando se midió el efecto del wind lens en flujo turbulento, se obtuvo un aumento del 20 % o más en la velocidad del viento. El wind lens demostró ser adecuado para turbinas eólicas que operan en flujo turbulento, acrecentó la velocidad del viento en todas las pruebas, generando un mayor aumento a mayor intensidad de turbulencia.

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The Performance of Shrouded Wind Turbine at Low Wind Speed Condition

Cited by 12 publications

References 12 publications

Performance evaluation of a downwind diffuser on vertical axis wind turbine

Performance evaluation of a downwind diffuser on vertical axis wind turbine

Effect of Shroud Components on the Performance of a Small Horizontal Axis Wind Turbine

Efecto de un difusor tipo wind lens en flujo turbulento

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