Abstract
AbstractThe aerodynamic performance of three different configurations of vertical axis wind turbines (VAWT), namely: (a) conventional Darrieus troposkein VAWT (based on turbines designed by Sandia National Laboratories), (b) novel 50% STS‐VAWT (50% shifted‐troposkein‐shaped STS‐VAWT), and (c) novel 100% STS‐VAWT were investigated numerically. An in‐house code, which combined the blade element theory (BET) and the vortex filament method (VFM), was used. The main purpose of this work was to develop an aerodynamic code to predict the performance of conventional VAWT as well as assess the novel 50% and 100% STS‐VAWT configurations. Simulation results (power coefficients) were verified and then validated against experimental data available from the literature (2‐, 5‐, and 17‐m conventional troposkein VAWT measured by Sandia National Laboratories). Additional numerical results showed that the 50% STS‐VAWT outperformed both the conventional VAWT and the 100% STS‐VAWT by up to 14% (peak power), within the range of rotation and turbine sizes that were investigated in the present work.
Highlights
World energy generation should increase ~28% by 2040,1 when the contribution from renewable sources would increase to at least 31% of the total energy production, mainly from wind and solar power generation expansions
This paper describes the performance comparisons between the novel configuration design (STS‐Vertical axis wind turbines (VAWT)) configurations and the conventional design of troposkein VAWT
Simulation predictions of the performance (CP − ) of the three conventional VAWT configurations (2, 5, 17‐m) were validated against test data from the Sandia National Laboratories found in the literature 20-22 as well as other aerodynamic code results.[7,24]
Summary
World energy generation (including renewable and nonrenewable sources) should increase ~28% by 2040,1 when the contribution from renewable sources (wind, solar, hydropower, geothermal, and others) would increase to at least 31% of the total energy production, mainly from wind and solar power generation expansions. Wind energy (including offshore applications) is currently responsible for more than 40% of the total renewable energy growth. Horizontal axis wind turbines (HAWTs), which need to stand on massive concrete or steel towers, exhibited a number of drawbacks for deep‐water offshore applications if anchored to depths >40 m.2-5. Vertical axis wind turbines (VAWT), on the other hand, could potentially be installed offshore 6 (mainly in deeper waters using floating platforms, eg, DEEPWIND.EU project). The troposkein design has curved blades (similar to an egg beater). Darrieus in 1931.7 the troposkein rotor‐based design was the most sophisticated turbine among several other VAWT designs, it has not been widely explored
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