Doc-20190308-wa0000.pptx

DHANALAKSHMI SRINIVASAN COLLEGE OF ENGINEERING AND TECHNOLOGY

EXPERIMENTAL INVESTIGATION OF DUCTED HELICAL FLOW IN WIND TURBINE BATCH MEMBERS: ASHOK KUMAR.S GUNAVATHI HABIL AHAMED HUSAIN.V RAJESH.M

(310515101006) (310515101008) (310515101009) (310515101017) GUIDED BY: ASST PROF: D.HARI, ME.

ABSTRACT: The design of wind turbine blade for low wind speed area is historically experimented by many researchers and give us different results with nearly same parameters. Also augmentation of wind turbine improves power generation capacity in magnified manner. This paper deals with the fabrication of and investigation of augmented wind turbine specially prepared with helical flow path. The experimentation is done with combination of different parameters such as wind speed, Pitch distance and angle of attack of wind flow.

INTRODUCTION  A Wind Turbine is a device that converts the wind kinetic energy into electrical energy.  Wind turbine vary vastly in size, Shape and orientation.  Wind power was probably used in Persia(present day Iran) about 500-900AD . The first known practical wind power plant were build in Sistan, an Eastern province of Iran.  These “Panemone” were vertical axle wind mills, which had long vertical drive shaft with rectangle blade.

 wind power 1st appeared in Europe during the middle ages The 1st historical records of their use in England date to the 11th or 12th centuries.  An average on shore wind turbine with a capacity of 2.5-3MV can produce more than 6 million KWh in a year.  The ducted wind turbine was first introduced by Lilley and Rainbird with the earliest experimental research performed by Foremen et al.

Existing system:  Ducted wind turbines(DWT’s), in comparison to open turbines increase the power obtained by a fixed sized rotor by increasing the momentum through the rotor.  The simple duct was kept to increase the velocity of the wind

LITERATURE REVIEW AUTHOR NAME

TITLE

TECHNOLOGY USED

CONCLUSION

1

Peace-Maker Masukume, Golden Makaka, and David Tinarwo

Technological analysis of Ducted Wind Turbines and Their Slow Acceptance on the Market

Ducted wind turbine produce electricity and saved in batteries for later use with inveters

The turbine produces electricity at lower costs than bare wind turbines

2

Ravon Venters, Brian T.Helenbrook, and Kenneth Visser

Ducted Wind Turbine Optimization

Positioning the duct at the optimal orientation has a significant impact on achivable performance. The cross section duct was an Eppler 423 airfoil

The thrust coefficent of the rotor of the DWT is lower than of open rotor. This suggest that DWAT rotor must differ from what is used for comparable HWAT

S.NO

Proposed system:  The helical flow path in an augmented wind turbine we introduce a helical flow path in an turbine.  The helical flow path thus increases the momentum of a blade and increases the swirl of the flow.

ADVNTAGE OF PROPOSED SYSTEM:  The swirl path increases the vortex of the wind.  The vortex increase the turbulence it is possible to increase the power.  Thus this system helps in production of renewable energy.

APPLICATIONS:  Reduces the cost than the normal horizontal wind turbine.  It can be easily placed on the roof of homes.  It reduced the electricity bills.

MEATHODOLOGY: WIND TURBINE DUCT MODEL & PARAMETER:  The designing of duct and manufacturing convergent duct, a duct has been designed using CATIA and fabricated using composite material and epoxy resin.  A model of a duct is designed in CATIA and analyzed in ANSYS how the velocity of the air is increased is calculated using software and done experimentally.  Designing the model and analyzing helps us how effectively our design will be in real time process, thus increase our model efficiency.

Blade Design: Airfoil selection: Initially some assumptions such as tip ratio, Number of Blades, Airfoil, etc. SG604X series airfoil has been selected. Station

Pos(m)

Chord(m)

Twist(deg)

Airfoil

1

0

0.065

9

SG6040

2

0.125

0.055

6.75

SG6041

3

0.220

0.045

5.4

SG6042

4

0.475

0.027

0.45

SG6042

5

0.500

0.025

0.00

SG6043

Blade designed in catia v5

HUB DESIGN:

DIA:16 cm and Thickness: 2 cm.

Generator Specifications:     

RPM: 300-3000, AMP: 4amp, VOLTAGE: 24V, POWER: 140Watts, TORQUE: Low Torque.

FLOW ANALYSIS:

 Thus the above flow analysis shows how the velocity of the wind increases from its initial value.  The velocity has been increased while implementing a ducted convergent nozzle design in a turbine.  This helps in increasing the efficiency of the turbine over the available wind energy effectively.  Adding a helical path it increases the swirl of the wind thus ot increases the RPM of the shaft.

SCOPE:  Cuts off the electricity bills.  Easy design.  low cost.  Reduces man power.  Low maintenance cost.  Easy mounted in the roofs of the buildings.

REFERENCE: .Heard J.W. van Bussell et al, "An Assessment of the performance of diffuser Augmented wind turbine (DAWT's)", proceedings of the 3rd ASME/JSME Joint fluid engineering conference,July 18-23,1999, San Francisco, California .OzerIgra, “Reseach and Development for Shrouded Wind Turbine” , Energy Cont. &Momt Vol.21.pp.13 to 48 .1981 .Barry, L. Gilbert, “Fluid Dynamics of Diffuser-Augmented Wind Turbine” , Journal of Energy , 368-375, Vol.2, No.6.  Michael S. Selig, “Summary of low speed Airfoil Data – V3”,SoarTech publication, Virginia Bech, Virginia.  .Nicolette ArnaldaCencelli, “Aerodynamic Optimization of SmallScale Wind Turbine Blade For Low Wind Speed Conditions’’, Thesis, University of Stellenbosch, December 2006.

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