Typicla Power Pattern of a Winter Day in Colorado

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Hour of the Day

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wer

(MW

)Smart Grid Concept

Wind

Load

Coal

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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

Single Stream Tube Model

• The angle of attack in this model, under the assumption of zero degree tilt angle ( = 0) is given by = = tan-1 [ (1-a) cos (+/2) / { + (1-a) sin (+/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

2

• 1 / (1-a) = 1 + (Bc/16R) o [{y + sin (+/2)}2 + cos2(+/2)] CL() cos [(+/2) +] d

where y = /(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 2

P = (uBA/4) o vr2 [CL() sin - CD() cos ] d

• wherevr

2 = v2 [{ + (1-a) sin (+/2)}2 + {(1-a) cos (+/2)}2]

Doubly-Fed Induction Generator

Off-The-Grid

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

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