vertical axis wind turbine ppt

Ngày tải lên: 01/04/2014, 00:20

... single straight-blade vertical axis wind turbine The geometry of this simple model is shown in Figure 3; the blade is rotating in the counter-clockwise direction while the wind blows from left ... Stream-tube Model for Studying Vertical Axis Wind Turbines AIAA J of Propulsion and Power Vol 4, pp 370-378, 1988 [7] Manwell J.F., Mcgowan J.G and Rogers A.L Wind Energy Explained Wiley, 2009, ... the following expressions for induction factor a and power coefficient Cp for a single vertical axis wind turbine are obtained [7]: ISSN 2076-2895 (Print), ISSN 2076-2909 (Online) ©2012 International...

Ngày tải lên: 05/09/2013, 17:03

... atmospheric ice along a large wind turbine blade and analyses the ice distribution to identify the most affected areas due to icing Numerical setup The NREL MW wind turbine s blade radius used ... collision efficiency at three different sections of the wind turbine blade Figure Droplet collision efficiency at different sections of NREL MW wind turbine blade 3.2 Atmospheric ice accretion To study ... geometric parameters the ice accretion on the wind turbine blades can be minimized This could reduce the need for de- and anti-icing systems on the wind turbine blades installed in the cold regions...

Ngày tải lên: 05/09/2013, 14:58

... losses in wind turbine, ρ = air density in kg/m3, A = swept area in m2, Cp =power coefficient of wind turbine, V = wind speed in m/s Mechanical power of wind turbine is directly related to the wind ... MATLAB Modeling of wind turbine The turbine is a wind energy conversion system It consists of an induction generator and other electrical control power requirements The wind turbine is effected ... coefficient [9] λ=ωt×r/V (6) where: r = wind turbine rotor radius, V = wind speed, ωt = mechanical angular rotor speed of the wind turbines Initially, wind speed is not useful until it reach...

Ngày tải lên: 05/09/2013, 16:10

Ngày tải lên: 22/12/2013, 23:17

... + - - + ∆α i+1 Fig.7: Wind turbine output power without MPPT control method for low wind speed Fig gives the wind turbine output power without MPPT control method at low wind speed In this case, ... with MPPT control method at low wind speed The use of the MPPT converter imposes a low DC bus voltage to recover the wind energy at the low winds speeds Fig.8: Wind turbine output power with MPPT ... Fig.9 : Wind turbine output power without MPPT control method for high wind speed dopt ‹— di+2 yes ∆P/∆d>0 d ‹— d + ∆d N d ‹— d - ∆d Pi ‹― P i+1 Fig.10 : Wind turbine output power with MPPT control...

Ngày tải lên: 03/01/2014, 19:15

... in the MATLAB/Simulink® software environment A Wind turbine model The wind turbine extracts the wind aero dynamical power The model of the wind turbine uses several inputs to estimate precisely ... ‘Dynamic Behavior of a Class of Wind Turbine Generators during Random Wind Fluctuations’, IEEE Transactions on Power Apparatus and Systems, No June 1981 Z Lubosny Wind Turbine Operation in Electric ... Power coefficient curves for 2kW wind turbine model 10 20 30 40 50 Time [s] 60 70 80 90 100 Fig Typical wind profile The aero dynamical power is described by (1) Pwind = ρAν 3C p (λ, θ) Fig Non-inverting...

Ngày tải lên: 03/01/2014, 19:15

... conduction mode (DCM) So far, in the PHC of ac output, the energy is transferred from dc source (i.e Wind Turbine) to ac grid through the alternations of Mode and Mode Mode 3: Negative half cycle (NHC) ... charged from a dc source (i.e Fig Buck-boost inverter operation in the continuous current mode Wind Turbine) and discharged to a grid through a low pass filter The inductor current can be discontinuous ... of the buck-boost inverter under the open loop feedforward compensation control 229 design for wind turbine systems and other distributed generators The two coupled inductors L1 and L2 have the...

Ngày tải lên: 03/01/2014, 19:16

... standard deviation of unsteady pressure, respectively B/D=1 B/D=1 with S.P Wind Wind po1 po1… B/D=5 Splitter Plate (S.P) Wind po1 po1… po1 po1… Fig Experimental models and pressure tap layouts It ... pressure, J .Wind Eng Ind.Aerodyn., 54-55 (1995) 369 [9] H Kikuchi, Y Tamura, H Ueda, K Hibi, Dynamic wind pressure acting on a tall building model – proper orthogonal decomposition, J Wind Eng Ind ... orthogonal decomposition of random wind pressure field, J Fluid Struct., 13 (1999), 1069 [11] Shinozuka, M., Yun, C.M., Seya, H., Stochastic methods in wind engineering, J Wind Eng Ind Aerodyn., 36 (1990)...

Ngày tải lên: 13/02/2014, 03:20

... A: Wind Turbines – Introduction to Wind Energy AA-1 AA.1 Origin of the Wind AA-3 AA.2 Variability of the Wind AA-3 AA.3 Power in the Wind AA-7 AA.4 Wind ... follows More information on wind turbines may be found in the appendices, particularly in Appendix A 2.1 Wind Turbine Anatomy and Operation Wind turbines utilize the wind, which originates from ... the wind available to a wind turbine is related to the cube of the wind speed and the square of the radius of the rotor Not all the available power in the wind can be captured by a wind turbine, ...

Ngày tải lên: 09/03/2014, 00:20

... (wind = m/s) 20) Lifetime 21) Is the machine self-starting Yes 22) Use of an asynchronous generator Yes 23) Yaw control system 24) Upwind or downwind Wind vane 2 10 Wind speed (m/s) Downwind turbine ... (wind = m/s) 20) Lifetime 21) Is the machine self-starting 22) Use of an asynchronous generator 23) Yaw control system 24) Upwind or downwind Yes 18 12 10 No Wind vane Upwind turbine 11 13 Wind ... power Unit Wind speed (m/s) Power (W) 10 50 0,6 kW 2) Rated wind speed 10 m/s 3) Cut-in wind speed m/s None m/s No limit Km/h 37 kg m 10 m 11 4) Cut-out wind speed 5) Maximum wind speed the turbine...

Ngày tải lên: 24/03/2014, 05:20

Ngày tải lên: 25/03/2014, 05:22

... pattern of the deployment of wind turbines at the Cape Wind wind farm project According to computer simulations, the 130 400-foot, 300-ton steel monopiles that will hold the turbines will be situated ... Sagrillo, M 2004 Aesthetics issues and residential wind turbines American Wind Energy Association’s Wind Energy Technical Info Suzuki, D 2005.The beauty of wind farms New Scientist 16 April 2005 Taylor, ... think wind turbines are ugly I think smokestacks, smog, acid rain, coal-fired power plants and climate change are ugly I think wind farms are beautiful They harness the power of the 78 wind to...

Ngày tải lên: 30/03/2014, 16:20

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Ngày tải lên: 20/06/2014, 01:20