12. Typicla Power Pattern of a Winter Day in Colorado
0
100
200
300
400
500
600
700
800
900
0 5 10 15 20 25 30
Hour of the Day
Power(MW)
Smart Grid Concept
Wind
Load
Coal
52. Performance Prediction theories for Vertical Axis
Wind Turbines
i) Self Developed Theory
ii) Single Stream Tube Theory
iii) Multiple Stream Tube Theory
iv) Fixed Wake Theory
53. Single Stream Tube Model
• The angle of attack in this model, under the assumption of zero degree tilt
angle (φ = 0) is given by
θ = α = tan-1 [ (1-a) cos (β+π/2) / {λ + (1-a) sin (β+π/2)}]
• The value of the induction factor a is inferred numerically through the
iterative solution of the following equation in the allowed range of a
2π
• 1 / (1-a) = 1 + (Bc/16πR) ∫o [{y + sin (β+π/2)}2 +
cos2(β+π/2)] CL(θ) cos [(β+π/2) +θ] dβ
where y = λ/(1-a), B is the number of blades used, c is the chord length
of the airfoil and R is the radius of the circulation span.
• This scheme suggests an average power of
2π
P = (uBAρ/4π) ∫o vr
2
[CL(θ) sin θ - CD(θ) cos θ ] dβ
• where
vr
2
= v2
[{λ + (1-a) sin (β+π/2)}2
+ {(1-a) cos (β+π/2)}2
]
72. Fields to be Mastered
* Fluid Dynamics
* Structural Mechanics
* Materials Sciences
* Electro – Generator Science & Technology
* Numerical Analysis & CFD
* Computer Programming, Modeling & Simulation
* Wind Data Analysis & Profile Estimation
* Marketing & Cost Analysis
* Legislative Requirements
* Computer Interfacing / Automation
* Energy Storage Devices & Mechanisms ( Batteries,
Fuel Cells, Electrolysis, Air Compression etc. )
Making any meaningful contributions in this area requires
extraordinary resolve, persistence and perseverance, due to
the vast spectrum of disciplines that need to be
comprehended, perfected and interconnected
73.
74.
75. Patent
No.
Title Status
141192 A Single Vacuum Tube Based Solar
Cooker
Granted
246 / 2011 A Process for Making Low Cost Wind
Turbine Electric Generators
Under
Process
472 / 2011 A Mould Free Process for Making Ultra
Light Weight Wind Turbine Blades
Under
Process
515 / 2011 A Self Starting High Speed Vertical Axis
Wind Turbine with Distributed Blade
Sections
Under
Process
538 / 2011 A Gravity Driven Sun Tracking System
for Solar Cookers
Under
Process
567 / 2011 A Direct Drive Electric Generator for
Vertical Axis Wind Turbines
Under
Process
589 / 2011 The Juggler’s Drum Knee Separator Under
Process
620 / 2011 A Fridge without Power Under
Process
