Bicycle Harvesting Waste Energy: Bicycle Power Generation

MSD-I RIT-Systems Design ReviewWinter/Spring 2011-2012P12414

January 13, 2012Group # P12414

Guide Professor Brownell

Team Members• Daniel Tobin (ME)

▫ Project Manager

• Amina Purak (ISE)▫ Facilitator

• Aaron Sieczkarek (ME)▫ Chief Engineer

• Brenda Lisitano (ME)

• Zheng “Flora” Li (EE) GUIDE: Professor Brownell

Design Review Agenda•Project Background

▫Summary▫Constraints/Needs/Specifications

•Functional Analysis▫Functional Decomposition▫House of Quality

•Concept Development & Selection▫Pugh Square▫Systems Architecture

•Risk Assessment

Project Description Project Background: People in countries with inadequate infrastructure have an unmet need for electricity. A possible source for creating and storing power is a bicycle rotation energy harvesting system. This system could provide the energy required for light, communication or water treatment. This device converts kinetic energy to electrical energy for small electronic devices. Several available products satisfy the basic requirement of supplying power. However, these products operate constantly while the bicycle is in motion. Problem Statement: Our goal is to transform kinetic energy within a bicycle into an electric power source intended to charge a cell phone. Our creation is expected to be cheap to build, and easy to install, maintain and use. Objectives/Scope: 1. Charge cell phone or battery using a bicycle. 2. Design around the most affordable options. 3. Create an encasing that is durable enough to withstand debris and other environmental damage. 4. Design should require only the most basic tools, if any, to repair and maintain. 5. Design materials should be durable and easy to assemble. 6. Device adds minimal work to the rider. Deliverables: Cheap power source design for the benefit of many

people’s most basic electric needs. A lightweight, low cost, durable charging device

that can be attached to a variety of bicycles to fully charge a cell phone battery.

Documentation for proper assembly and manufacturing.

Test plan for development. Test results of designs. Documentation of actual cost. Opportunities for growth Poster detailing waste power collection for a bicycle.

Expected Project Benefits: A well-documented attempt at creating a

lightweight, inexpensive to manufacture, durable charging device that can be attached to a variety of bicycles to charge a cell phone battery.

A very low cost and efficient energy source that could benefit many people

Its use would allow those who do not have ready access to power to have a way to power communication devices and lights that assist in their lives.

Core Team Members: Amina Purak - Facilitator Daniel Tobin Aaron Sieczkarek Brenda Lisitano Zheng Li Tomas Gomes Strategy and Approach Assumptions and Constraints: 1. We only have 22 weeks of time from being assigned the project to having a functional prototype available. 2. We will have to search for low cost parts; Develop and analyze custom designs vs. existing materials intended to suite our purposes. Issues & Risks: Design specifications may need to be modified, as

the device is tested/designed to be reproducible. Design may not be able to meet cost specifications Additional experts and consultants may be needed to

supplement design and analysis skills of the team. Significant testing needs to be conducted to verify

solution.

Constraints• Harvest the energy from the momentum of the moving bicycle.

• The unit price should be affordable; the primary target is for developing countries.

• The design shall be ergonomic

• The product should be weather/water resistant.

• It is preferable to manufacture and assemble components in-house from raw materials where feasible.

• Project success will be based on how fast the technology could be reproduced or re-manufactured by individuals with low levels of training or exposure.Budget Estimate: Major cost items

anticipated. Product Benchmarking $150Prototype construction $350Testing $100TOTAL $600

Customer NeedsObjective: Power simple personal devices using energy

stored in the momentum of a bicycle

Importance Weight

Need # Customer Needs low = 1, moderate = 3, high = 9

Need 1 The device provides power to charge a cell phone or a rechargeable battery to power LED lighting

 10

Need 2 The device attaches to a wide variety of bicycle types

 6

Need 3 The device adds only a minimal increase in effort for the operator pedaling the bicycle, ideally none at all

 4

Need 4 The device uses standard connectors to personal electronic devices

 8

Need 5 The device is light weight  4Need 6 The device is inexpensive to purchase, install and

maintain 7

Need 7 The device is easy to install  5Need 8 The device is easy to operate  6Need 9 The device is easy to maintain  6

Need 10 The device resists environmental damage from dust, water, etc.

 8

( Need 11 The device works well on rough roads  8Need 12 The device protects user safety  8Need 13 The device is a stylish accessory to the bicycle 3

SpecificationsSpecifications Units Ideal MarginalOutput voltage VDC    Power output W >5 >2Energy Conversion Efficiency %    

Maximum charging rate range (depends on battery) J/s    

Estimated biking time to generate power 1 W-hr (if the device does not generate continuously) hrs <0.5 <1Maximum increased effort for bicyclist % 0 <3

Variation in bicycle dimensions (actual specs will depend on design of generating system, "wheel sizes range" for example)      

Uses standard connectors to interface with cell phone or battery charger for LEDs binary Yes YesWeight kg <1 <3Number of people required to install device people 1 2Number of tools required to install device   <2 <5Time required for set up (each use) min <10 <20Time to train operator to use device min <10 <30Minimum operating temperature degrees C <0 <5Maximum operating temperature degrees C >45 >40

Increased temperature to bicycle parts (rim, gears, ??)      Manufactured Cost (lots of 100) $ <20 <40Installation Cost $ 0 <5Wires resist pulling forces N    Electronics protected from rain/splashing binary yes yesResists damage from impacts/crashes N    

People rating the device at 4 or above on a scale of 1-5 for "aesthetically appealing" % 70 50

Supply Power

Generate Power

Support Physical System

Protect System

Attach UI

Attach Power System

Attach Personal Electronics

Convert Mechanical E. to Electrical E.

Transfer Electrical/Move to Storage Control Power

Store Power

Condition Power

Regulate Power

Distribute Power

Monitor Power

Protect User

Protect Hardware

Protect from electrical shock

Protect from physical harm

Protect from user damage

Protect from environmental damage

Protect from Impact

Protect from Installation Error

Protect from Operating Error

Protect from Impact

Protect from Temperature

Protect from Water

Protect from Vibration

Protect from Particulates

Harvesting Bicycle Rotational EnergyFunctional DecompositionRevision 212/14/2011DBT

Sell Product

Make adaptable

Make Portable

Make aesthetically pleasing

Make Lightweight

Make affordable  Reference Page 5

House of Quality

Reference Page 6

Pugh Square Analysis•Concept Selection and Brainstorming•Datum (Based of of MIT Model)

http://designother90.org/cities/solutions/bicycle-phone-charger

Store Power

Convert Energy

Condition Power

Regulate Power

Distribute Power

Monitor Power

Protect UserFrom Electrical Shock

Protect DeviceFrom Impact

Attach Power System

Attach UI

Attach Personal Electronics

Protect UserFrom Physical Harm

Protect DeviceFrom 

Installation Error

Protect DeviceFrom 

Operating Error

Protect from 

Particulates

Protect from Water

Protect from Temperature

Protect from 

Vibration

Functional or Physical Elements

Flow of forces or energy

Flow of m

aterial

Flow of signals or data

Bicycle Energy Harvesting System Schematic

Store Power

Convert Energy

Condition Power

Regulate Power

Distribute Power

Monitor Power

Protect UserFrom Electrical Shock

Protect DeviceFrom Impact

Attach Power System

Attach UI

Attach Personal Electronics

Protect UserFrom Physical Harm

Protect DeviceFrom 

Installation Error

Protect DeviceFrom 

Operating Error

Protect from 

Particulates

Protect from Water

Protect from Temperature

Protect from 

Vibration

Cluster Elements into ChunksEnclosure

Attachments

Logic Board

User Interface

Rechargeable Batteries

Generator

Manual or Instructions

Functional or Physical Elements

Chunks

Risk Assessment

Risk Assessment cont…

Risk Assessment cont…

Questions/Discussion?