A preliminary insight into the possibility of utilising the aerodynamics of moving bodies to generate electricity.

1. Presented By: Kundan Chakraborty (14200712032)
Department of Mechanical Engineering
Batch: 2012-2016
Meghnad Saha Institute of Technology
Subject: Design of Mechanical System (ME 881)

2.  CONTENTS
 Introduction
 Working principle of Wind Turbine
 Calculations
 Wind in moving trains
 Our project
 Scope
 Conclusion

3.  INTRODUCTION
• Wind energy is created when the atmosphere is heated unevenly by
the Sun, some patches of air become warmer than others.
• A wind turbine extracts energy from moving air by slowing the wind
down, and transferring this energy into a spinning shaft.
(Translational K.E. Rotational K.E.)
• Wind turbines can be used anywhere, only the wind speed has to be
optimal to make the turbine work.

4.  WORKING PRINCIPLE
• When the train moves with an average speed , the wind turbine attached to it
also rotates. The turbine should be placed in such a way that the wind strikes
the blades. This gives the turbine a rotational movement.
• The turbine is placed along the path of the wind flow (mounted on the train)
then the blade rotates and energy is generated.
• When the train moves, the turbine rotates and this rotational energy can be
converted into electrical energy which provides power to the various loads such
as fans and lights etc.
• We can also store the excess charge in battery which can be used for further
use.

5. CALCULATIONS
Power Generated:
P = 0.5*⍴*V3*A
P = Power (W)
⍴ = Density of air (kg/m3)
V = Wind speed (m/s)
A = Effective area of turbine blades (m2)

6. CALCULATIONS
Generator Size:
A = (cf)*(gs)*(8760)
A (kwh) = Annual energy production (kwh/yr)
cf=Capacity factor (efficiency factor)
gs=Generator size (rated power,kw)

7. WIND IN MOVING TRAINS
 When a moving object moves through an elastic fluid, it displaces the fluid
surrounding it.
 Displaced fluid tends to re-occupy the void created after the object moves
away from its position.
 Due to high velocity of trains, this effect is prominent.
 The force generated by these winds can be utilised without affecting much
the aerodynamics of the train, i.e., increasing the drag.

9. OUR PROJECT
• After a detailed study of the readings obtained from about 20 fast and slow trains
we came to a conclusion that on an average a single turbine is capable of generating
6 – 7 V (1.8 - 2.5mA) for a fast train and 5 – 6 V ( 0.5 - 1.5 mA) for a slow train.
• This may seem small, but further improvements to the design of turbine blades and
the generator can increase the power generated effectively.
• Array of equidistant turbines mounted on the train can also increase the power
generated.

10.  SCOPE
• Implementation of this project can abundantly decrease the
electricity requirement of trains.
• Generated electricity can be used to run components inside
the compartments.
• Mobile devices can be charged easily.
• Further research possible.

11.  CONCLUSION
• India is a land of unlimited potential.
• Wind energy is a great source to fulfil India’s energy needs
as well as develop its economy.
• Huge amount of capital investment required for R&D and
implementation.
• Research and development centres should be opened for
further enhancement.
• Metro networks can be a great source of wind power.

12. COPYRIGHT POLICY
No part of this project, except for layout can be copied and used for
any purpose whatsoever, without the absolute permission of the
author. For using this file for education purposes contact the author
@chakrabortykundan1110@gmail.com.
Please mention your interest and intentions while correspondence.

13. DISCLAIMER
It is to hereby declare that some parts of this
project has been benefitted by inputs from
various sources on the Internet. It is highly
appreciated from the author’s end. If it is found
by anyone, that this project contains inputs
from his/her works, please feel free to convey
your feelings to the author
@chakrabortykundan1110@gmail.com.
Please provide valid proof of your related work
along with your correspondence. This project is
solely a personal venture. Anyone interested to
work together in this project is heartily
welcome.
The author appreciates cooperation from
anyone willing to contribute to this project.