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# Renewable energy course#02

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### Renewable energy course#02

1. 1. 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
2. 2. 19 18 21 22 24 23 20
3. 3. 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
4. 4. 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 ]
5. 5. Doubly-Fed Induction Generator Off-The-Grid
6. 6. 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
7. 7. 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