Vertical Axis Wind Turbine

on

 Vertical Axis Wind Turbine

Prof. D. P. Narsale (dpnarsale@coe.sveri.ac.in)

Assistant Professor, E&TC Department,

SVERI's COE, Pandharpur

     1.    Introduction

Wind energy is a renewable resource of energy thus, Windmill is being used from a long time to generate the electricity and they are mainly located in the coastal areas where the wind speed is very high. But can you think to locate the wind turbine on high ways. Vertical axis wind turbine that generates electricity from wind energy.It also has solar panel to capture extra energy from sunlight. It is designed to capture the energy created by modern cities like wind created from passing vehicles. 


 2.     Design and Constriction

The aerodynamic shape is formed with a rear side(convex shape) is much more curved than the front side(concave shape) facing the wind.VAWTs are a type of wind turbine where the main rotor shaft is set transverse to the wind (but not necessarily vertically) while the main components are located at the base of the turbine. Vertical axis turbines are powered by wind coming from all 360 degrees, and even some turbines are powered when the wind blows from top to bottom.

The Savonius rotor is an extremely simple vertical-axis device that works entirely because of the thrust force of wind. The basic equipment is a drum cut into two halves vertically. The two parts are attached to the two opposite sides of a vertical shaft. As the wind blowing into the structure meets with two dissimilar surfaces-one convex and the other concave-the forces exerted on the two surfaces are different, which gives the rotor a torque. By providing a certain amount of overlap between the two drums, the torque can be increased. This is because the wind blowing into the concave surface turns around and gives a push to the inner surface of the other drum, partly cancelling the wind thrust on the convex side. It has been found that an overlap of about one-third the drum diameter gives the optimum result. The Savonius rotor is inexpensive and simple, and the material required for it is generally available in any rural area, enabling onsite construction of such windmills. However, its utility is limited to pumping water because of its relatively low efficiency. 


 

     3.     Working

This turbine uses the wind pressure generated by the fast-moving vehicles on roads such as big trucks and busses helps most to rotate its blade. It is designed with vertical long blades such that it can use the maximum amount of wind energy. Vertical wind turbine covers the lesser area on the ground. Solar Panel is also fixed at the top of the turbine to generate extra electricity. This device can produce 1 kilowatt of electricity per hour.

      4.     Applications

  • The vertical wind turbine also has some inbuilt sensors like carbon footprint sensor which is used to sense the amount of CO2 level in the atmosphere, it can also detect earthquake and IOT platform, and these are given to ensure the comfort level of the city.
  • These vertical wind turbines can be installed near park. These are mainly designed to be located at the roadside and beside railway tracks so that it can generate the maximum amount of electricity by the wind energy getting from the moving vehicles.
  • VAWTs can be grouped more closely in wind farms, increasing the generated power per unit of land area.
  • VAWTs can be installed on HAWT wind farm below the existing HAWTs; this can supplement the power output of the existing farm

      5.     Advantages

  • Strong supporting tower is not needed because generator, gearbox and other components are placed on the ground.
  • Low production cost as compared to horizontal axis wind turbines.
  • Easy installation as compared to other wind turbine.
  • Easy to transport from one place to other.
  • Low maintenance costs.
  • They can be installed in urban areas.

        6.      References

  •  Buchner, A-J.; Soria, J.; Honnery, D.; Smits, A.J. (2018). "Dynamic stall in vertical axis wind turbines: Scaling and topological considerations". Journal of Fluid Mechanics. Vol1, 746–66.
  • P.Karthikeyan, P.Dineshkumar,. (2019). “Design and Development of ENLIL Turbine for Highways Electrification ". International Journal of Advanced Research in Electronics and Instrumentation Engineering, Vol. 8, 1232-1235.
  • Peter  J.  Schubel  and  Richard  J.  Crossley, (2012)  "Wind  Turbine  Blade  Design, Energies," Vol 5 3425-3449


  •  Javier Castillo,(2011),” Small-scale Vertical Axis Wind Turbine Design”. Bachelor’s Thesis, December, Degree program in Aeronautical Engineering, Tampereenammattikorkeakoulu Tampere University of Applied Sciences, Vol 6, 455-459.
  • Navin Kumar Kohli and EshanAhuja, (2011) “Performance Prediction in HAWT Wind Power Turbine”, International Journal of Mechanical Engineering & Technology (IJMET), Vol 2, 0976 – 6359.

 

 

 

 

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