Evaluation of different turbine concepts for wind power

Eriksson, Sandra; Bernhoff, Hans; Leijon, Mats

doi:10.1016/j.rser.2006.05.017

Cited by 479 publications

(260 citation statements)

References 21 publications

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“…The oil crises in the late 70's and the need for an alternative source of energy brought new attention to renewable energy resources like wind. Different types of turbines including lift and drag types, vertical and horizontal axis turbines were designed and tested (Eriksson et al, 2008). Attempts were also made to the enhancement of wind turbine power generation.…”

Section: Forewordmentioning

confidence: 99%

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

2015

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Section: Forewordmentioning

confidence: 99%

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

2015

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“…Iida, Mizuno, and Fukudome (2004) predicts that the noise level of VAWTs is about 70 dB which is 10 dB lower than HAWTs. Second, the VAWT is insensitive to the wind direction (Eriksson, Bernhoff, & Leijon, 2008). Third, the VAWT has increased power output in skewed flows while the HAWT *Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of vortex dynamics in an H-rotor vertical axis wind turbine

Chen

Lian

2015

Engineering Applications of Computational Fluid Mechanics

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We study the vortex dynamics of a two-dimensional H-rotor wind turbine using a Navier-Stokes solver. The k-ε turbulence model with the wall function is used as the turbulence closure. A sliding mesh technique is employed to handle the blade rotation. The vortex-blade interaction is systematically investigated and its influence on the force generation is discussed. Our simulations show that the vortex-blade interaction largely depends on the solidity and tip speed ratio. We further study the impact of solidity on the turbine performance. Our simulations show that the peak torque per blade decreases with the solidity while the peak torque azimuthal angle increases with the solidity. Our simulations also show that the increase in the azimuthal angle is more significant at low tip speed ratios than at high tip speed ratios. The impact of blade thickness is studied. Our simulations show that a thicker airfoil has a higher torque coefficient than a thinner airfoil. However, because for the thinner airfoil its peak torque occurs at a high tip speed ratio, the thinner airfoil has an overall higher power coefficient than the thicker airfoil.

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“…They demonstrate the utility of this stage for next-generation photolithography or in other high precision motion control applications. 1074 S. Eriksson, H.Bernhoff, M.Leijon [7] made a comparative study of the horizontal axis wind turbine and two different concepts of vertical axis wind turbines; the Darrieus turbine and the H-rotor these three different wind turbines from the most important aspects including structural dynamics, control systems, maintenance, manufacturing and electrical equipment. A case study is presented where three different turbines are compared to each other.…”

Section: Dc-ac Conversion / Battery Charging Unit:-mentioning

confidence: 99%

Design and Fabrication of Maglev Wind Turbine.

Ghare¹,

Patil²,

Padgal³

et al. 2017

IJAR

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The traditional wind turbine need very high structures to allow room for their massive blades, hence Maglev Turbines are an ideal solution. It is estimated that renewable sources might contribute about 20%-50% to energy consumption in the later part of the 21st century. Maglev wind turbines have several advantages over conventional wind turbines. For instance, they're able to use winds with starting speeds as low as 1.5 meters per second (m/s). Also, they could operate in winds exceeding 40 m/s. At present the largest conventional wind turbines in the world produce only five megawatts of power. However, one large maglev wind turbine could generate one GW of clean power, enough to supply energy to 750,000 homes. The paper aims to make a systematic analysis of design and fabrication processes to find out optimum output from the Vertical Axis Maglev Wind Turbine and by also using solar panel for using the solar energy to generate electricity.Copy Right, IJAR, 2017,. All rights reserved. …………………………………………………………………………………………………….... Introduction:-Combining latest MagLev technology with PV (Solar) panels gives the best of both worlds for greater independence from costly grid electricity bills. From apartments to street lighting, hybrid systems are starting to bring consistent power to areas worldwide, MagLev turbines are an ideal solution to the traditional wind turbine, which need very high structures to allow room for their massive blades. MagLev technology (so called due to the 'magnetic levitation' friction free drive) has been around for a while as we know from the Magnetic Levitation high speed trains.Using MagLev technology in VAWT's (Vertical Axis Wind Turbine) means less moving parts, less maintenance, smaller profile and most importantly, very little wind to start working due to the lack of friction.The smaller more compact design of the VAWT, makes it ideal for home use as the unit and blades stand upright. Having magnetic levitation means the turbines weight is frictionless in operation allowing even a small breeze to turn it and produce power. The Excluss MagLev uses latest NdFeB (Neodymium) rare earth magnets which are 10x stronger than others, eliminating the need for any electromagnetic drive, making them friction and virtually maintenance free. Due to air/ground temperature difference, when the sun goes in ground wind instantly increases. So the Excluss hybrid system produces power day and NIGHT.

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Evaluation of different turbine concepts for wind power

Cited by 479 publications

References 21 publications

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

Effect of shroud on the performance of horizontal axis hydrokinetic turbines

Numerical investigation of vortex dynamics in an H-rotor vertical axis wind turbine

Design and Fabrication of Maglev Wind Turbine.

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