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Energy harvesting through footsteps

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Energy harvesting through footsteps

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Presentation on a concept of "energy harvesting through footsteps" made as part of a project on alternate energy at Noorul Islam University

Presentation on a concept of "energy harvesting through footsteps" made as part of a project on alternate energy at Noorul Islam University

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Energy harvesting through footsteps

  1. 1. Energy Harvesting Through Footsteps Project Guide: Prof.T.Judson Durai Team Members:Saran S.D, Sankar R.S, Sharon.M,Sherin Johnson Department of Mechanical Engineering Noorul Islam University 1
  2. 2. Energy Harvesting Through Footsteps “A rack and pinion based device to convert the footsteps of the user into useful energy” 2
  3. 3. Project Objectives  To form an effective energy harvesting concept  To form a practically applicable system to demonstrate the energy harvesting concept  To design and fabricate the system  To test the system under various models  To find applications for the system  To explore further scope 3
  4. 4. The Need Fast depleting natural resources  Coal is projected to enter production decline by 2030  Over dependence on coal based and other conventional methods for power generation  87.55% of India’s power production is based on non-renewable resources  60% of India’s total power production is coal based Lack of adequate power supply  Despite being the third largest power producing nation,300 million Indians lack access to electricity 4
  5. 5. Energy Harvesting  The process by which energy is derived from external sources, captured, and stored.  The input is not deliberately created for the purpose of power generation.  Taps energy that otherwise would’ve gone wasted.  Usually produces low outputs, suitable for small applications 5
  6. 6. Energy Harvesting Through Footsteps-Working Principle • Faraday’s Law: “As long as there is a change in magnetic flux linked with the coil, an EMF is induced” 6
  7. 7. Components  Spring based suspensor  Rack and Pinion  DC Generator (Magnet & Coil)  Rechargeable Battery  Inverter 7
  8. 8. Basic Design  Step mounted on spring based suspensor.  Suspensor connected to vertical rack.  Rack connected to pinion ,whose axis is connected to a generator.  Generator is linked to a rechargeable battery.  Battery is connected to a inverter. 8
  9. 9. 9
  10. 10. Working  User walks through the step.  Footstep activates the rack and pinion .  Generator connected to the axis of the pinion is activated.  An EMF is generated according to Faraday’s law.  Electric power generated is stored in the rechargeable battery.  Inverter module gives AC output . 10
  11. 11. Footsteps Rack & Pinion Magnet & Coil Rechargeable Battery Inverter Block Diagram 11
  12. 12. Selection of Components  Rack and Pinion  Rack and Pinion made of plastic  Rack has a length of 13 CM and has 65 teeth  Pinion has a diameter of 1.7 CM and has 15 teeth  Rack and Pinion sourced from a DVD drive  Selection helped save cost and weight 12
  13. 13. Rack 13
  14. 14. Pinion 14
  15. 15. Selection of Components  Suspensor  Spring based suspensor  Two springs of 5 CM length, 50 turns are used  Springs attached to the plate containing the rack and a plate below the rack.  Connections made using copper harness  Generator  A simple generator of 12 V output is attached to pinion.  Output of the generator given to rechargeable batteries 15
  16. 16. Suspensor 16
  17. 17. Generator 17
  18. 18. Rechargeable Battery  Two lead acid batteries of dimensions 9.2x9.7x6.7 CM used.  Each battery having output 6V-3.5A, combined output of 12V-3.5A . 18
  19. 19. Inverter  Inverter used has two transistors  Pulse Width Modulation Generator coordinates input to transistor  Transistor supplies input to coils  Coils convert DC from battery to AC 19
  20. 20. Design 20
  21. 21. Design Requirements  System must demonstrate power harvesting  System should withstand weight  System must be portable  System must have real time indication of power harvesting  System should demonstrate practical applications 21
  22. 22. Steps in Designing  Design of support base  Design of Footstep  Design of Supports  Design of demonstration circuit 22
  23. 23. Design of Support Base  Support Base designed to hold the weight of the setup, and add stability.  Flat surface with two protruding ends to act as stand  Dimension of 45.1x30x3.2 CM 23
  24. 24. Design of Footstep  Footstep designed to be retractable  One side of the footstep is fixed, other end being loose  Dimension of 18x5 CM 24
  25. 25. Design of Supports  Supports are designed in the shape of U  Two supports will be used to hold the steps  Dimensions 34.5x2 CM 25
  26. 26. Design of Demonstration Circuit  Designed to show the practical application of the system  Consists of generator, inverter and a household lamp  Circuit is triggered using a key 26
  27. 27. Fabrication 27
  28. 28. Steps in Fabrication  Fabrication of support base  Fabrication of footsteps  Fabrication of supports 28
  29. 29. Fabrication of support base  Support base was fabricated out of wood  Wood was sawed off, and polished  Stands were nailed into the wood 29
  30. 30. Fabrication of Footsteps  Footsteps are fabricated using sheet metal  Sheet metal is cut and bend into the shape of steps  This sheet metal was screwed into metal supports 30
  31. 31. Fabrication of Supports  Supports are made from cast iron  Cast iron was cut using hack saw and later welded together  The cast iron was bend to form curves 31
  32. 32. Final Model 32
  33. 33. Testing 33
  34. 34. Objective of Testing  To assess the performance of the system based on the response.  Test Models Used:  Testing with different weights  Testing with different rate of weight application 34
  35. 35. Testing with Different Weights  To assess the performance of the system under different weights  Weights of 1 Kg ,5 Kg and 10 Kg were used  In all cases, consistent output of 12 V was obtained Sl No Input Weight (in KG) Output (in Volt) 1. 1 12 2. 5 12 3. 10 12 35
  36. 36. Testing with Different Rates of Weights  Intended to test the performance under different rates of weight  Tests were carried out at the rates 1, 5 and 10 steps per minute  In all cases, an output of 12 V was obtained Sl No Rate of Footsteps (No.of times per minute) Output (In Volt) 1. 1 12 2. 5 12 3. 10 12 36
  37. 37. Observation  Consistent output is obtained under application of different weights and different rates  The model can be employed at used under varying load conditions and at varying rates of load. 37
  38. 38. Applications  Energy Generating Staircase  Self Illuminating Pathways  Burglar Alarms 38
  39. 39. Energy Generating Staircase  Multiple energy harvesting systems can be applied in staircases to obtain a greater amount of energy  Can be used in shopping malls, railway stations etc 39
  40. 40. Self-Illuminating Pathways  Pathways that light up when user steps on it  Suitable for application in homes 40
  41. 41. Burglar Alarms  System can be hidden under carpets next to windows, doors etc  Burglar alarms can be connected to the system, which will be triggered upon unauthorized entry 41
  42. 42. Scope of The Project  Fabrication of more rigid system  Fabrication of supports with lighter and stronger materials  Multiple systems can be installed under staircases to harvest more power  Real time testing can be carried out instead of using weights 42
  43. 43. Conclusion  The rack and pinion based power harvesting system is found to be effective  The system is cost effective and light in weight  The system has a variety of applications  The system harvest enough power for practical applications, without significant input  The system has large future scope 43
  44. 44. Thank You 44

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