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Contents
1. Filtering Solutions Conclusion This function specification lays out the requirements and capabilities that are to be expected from the Portable Filtering System We are currently developing and testing our filtering system and hope to have a final working product by December 15th 2010 13 References 1 2003 Ultraviolet Disinfection Retrieved October 12 2010 from Edstrom Web Site http www edstrom com DocLib M14178 pdf 2 2009 Bike Generator Generate Electricity While you Exercise Retrieved October 12th 2010 from Buzzle Web Site http www buzzle com articles bike generator generate electricity while you exercise html 3 Canadian General Standards Board CGSB 44 232 2002 Task Chairs for Office Work with Visual Display Terminals Ottawa Canadian General Standards Board 2002 4 Canadian Standards Association International CSA ISO 9241 5 00 Ergonomic Requirements For Office Work With Visual Display Terminals Standards Council of Canada 2000 142. 000 times more efficient than boiling the water because of many features UV is effective for all types of microorganisms UV is safe and not harmful for environment In addition UV has no impact on taste odor and color of the water To kill microorganisms the UV energy penetrates the cell and disrupts its DNA preventing reproduction Then after disinfecting the Water using UV the water can be used directly 6 1 General Requirements R55 B R56 B R57 C R58 C We will use UV bulbs radiate at 254 nm to be able to destruct all kind of Organisms uWs cm2 at 254 nanometer The container should be cleaned periodically When the UV bulb efficiency reduces to 60 the bulb should be replaced The bulbs will be isolated from water it will be in glass sleeve or it will be attached to a transparent container 6 2 Physical Requirement R59 B R60 C R61 C Before applying UV waves the water will pass through a filter to remove giardia spores and other larger organisms There will be cover for the container and warning sign on the container not to open the cover when UV bulbs on There will be a 4 mm thick viewing window on the container to check the bulbs s aquaQuick Filtering Solutions Electrical circuit requirement The electric circuit of the generated electricity shall be safe to protect the load and generator and safe for people There are some precautions to build a safe electric circui
3. B Two sturdy wheels shall be required for any road condition R2 B PFS shall be efficient to kill most bacteria R3 B Two large containers shall be required for carrying enough water at once R4 B The retail price of PFS shall be under CDN 200 R5 B PFS shall be constructed by hand crack generator gear system electrical circuit and water treatment module 3 2 Physical Requirements R6 C PFS shall have a maximum sum of height width and length less 250cm R7 C The diameter of wheel shall be no larger than 46cm R8 C PFS shall not exceed 15 kilograms not including the weight of water R9 B The wavelength of UV light shall be 254nm 3 3 Electrical Requirements R10 A The power of UV light bulb in water treatment module shall be 9W R11 A The output voltage from the generator shall be between OV and 20V R12 C The generator and battery shall be easily accessible for replacement R13 C The battery shall be operational for at least 6 years before requiring replacement R14 C The generator shall be operational for at least 8 years before requiring replacement R15 B PFS shall have a battery to charge the electricity from generator and then supply power to water treatment module 3 4 Mechanical Requirements R16 B PFS must not have sharp edges corners etc R17 C All parts of PFS shall be adjustable by tools for example screw driver R18 C The generator gear system and battery shall not be no
4. cir ii 2 Figure 2 Gear System and Generator Overview asia 3 Glossary User Developing Countries Rural Areas UV Any person pulling the PFS is the user of the PFS If the person pulling switches the user has switched as well If someone was to use any other means such as an animal to pull the PFS that would be considered the current user Any place where running water is not a norm and people have to walk to a source of water either man made or natural to acquire water Ultraviolet Light used to kill bacteria and filter the water aquaQuick Filtering Solutions Introduction The PFS is a filtering device for users specifically for people who have to walk large distances in order to access water The PFS allows the user greater ease while transporting the water due to being on wheels and also filters the water while it is being transported Being powered by its own motion it saves energy and is a perfect fit for developing countries This document provides the requirements for the PFS 1 1 SCOPE This document describes the functional requirements that every PFS unit will meet It will describe all features that will be found in the Proof Of Concept model and also detail the production device References to these specifications will be found in future documents and will also serve as guidelines while designing our working prototype 1 2 INTENDED AUDIENCE The guidelines and specifications detailed
5. here within are for use by all members of AquaQuick It will serve as a go to whenever any member is unsure of the direction his part of the project is to go in During testing and debugging this document will make sure the performance and features are in keeping with what we set out to do 1 3 CLASSIFICATION To help better organize this document the following scheme is used to classify our specifications RX Y Functional Specification X denotes the specification number and Y assigns to it a priority The priorities can be A Proof Of Concept only B Proof Of Concept and Final production system C Final production system only aquaQuick Filtering Solutions System Overview This section covers the general requirements of our PFS The specific subsystems are covered in later sections 2 1 SYSTEM OVERVIEW Figure 2 1 shows the basic overview of how our system Pours water through Mesh Filters larger impurities Our Proof Of Concept model will be a fully functional device but will have a motor driving the wheels to simulate the distance traveled by the user in the real world Once the user pours unfiltered water into the container it first encounters the mesh on the mouth of the container that Starts walking Wheels Rotate catches any large impurities After the container is completely filled the user seals the top and starts walking in the Proof Of Concept model this entails switching on the
6. October 14 2010 Dr Andrew Rawicz School of Engineering Science Simon Fraser University 8888 University Drive Burnaby British Columbia V5A 156 Re Functional Specification for the Portable Filtering System Dear Dr Rawicz The document presented here outlines the functional specifications for our Portable Filtering System PFS We are aiming to design a reusable durable and easy to use solution to the ever present problem of clean water in rural areas of developing countries By creating a self powered portable filter we feel that we will if not accomplish our goal definitely take a huge step in the right direction The functional specifications described here within provide details of our functionality as well as details of its high level performance Additionally this document will serve as a route marker for our team during our development and testing phases to ensure that levels of performance and final user features are in keeping with our original vision The AquaQuick team which is comprised of Vaibhav Mal Shivam Mathur Adam Tanabouz and Jie Gu can be contacted via the email address or phone number listed below and are more than happy to answer any questions you may have Regards Nibhar Mal Vaibhav Mal President and CEO Email vvmOsfu ca Phone 778 389 9401 AquaQuick Solutions aquaQuick Filtering Solutions Functional Specification for Portable Filtering System Project Team Vaibhav Mal Shiv
7. adequate RPMs are delivered to the motor so that enough power is generated independent of the users walking speed Apart from the aforementioned features every PFS posses a robust and sturdy construction so as to withstand the less developed and sometimes non existent roads that might be encountered in developing areas Since longevity is of paramount importance we will require our unit to pass rigorous reliability testing at every stage to increase the reliability of the final product as much as possible Since our main goal is to provide healthy clean water the water the PFS will deliver will meet the standards set by Health Canada aquaQuick Filtering Solutions Table of Contents Contents list OF FIGURES y A a ees v O A TAE E v tOdO Mii A AA AAA 1 System OVERVIEW ini di iii 2 Overall System REQUIEM ii operat edhe een a eee es 4 The Generator tia ont 7 Transmission Moda 8 Water Treatment Module cicesceescsesssncavtsoosnvanevansvesdevies i Eea EE aNEKSi 9 Electrical circuit requirement ii A ae 10 Documentation and Manuals ccsccecceecceeeeceeeeeeeeeeeeeeneeeacecaeceaecaeceaeeeeeseeeeseeaeeaeseeseeeeseeeeeaeeeaeeaeeeaeeeaeees 11 A ic eaters cre Sie ede ele cept ee ete octet sino eee Pe ee 11 CONCOS ORNS sess testes ces canastos lie cician talados oia 13 Referentes oireeni oy udeu evaded ENE EEO EE A RAEAN N NENEA E EATEN NEY 14 aquaQuick Filtering Solutions List of Figures Fip te 1 System Overview esa
8. am Mathur Jie Gu Adam Tanbouz Contact Person Vaibhav Mal vvm sfu ca Submitted to Dr Andrew Rawicz ENSC 440 Michael Sjoerdsma ENSC 305 Issued Date October 14th 2010 aquaQuick Filtering Solutions Executive Summary Water it is all around us Two thirds of our planet is covered by it Seventy percent of our own bodies are made up of water Almost all living creatures require water to survive including humans who also use it for various other purposes including cleaning bathing cooking etc to name a few Given this it is seems almost unbelievable that there are people who have to walk miles every day just so they can have access to water that is not even suitable for their consumption With the AquaQuick Portable Filtering System PFS the user will not only be able to transport the water with much more ease the water will also be filtered during the transportation using the inbuilt self powered filtering system The PES is intended to be a durable reusable and sustainable solution to the problem of clean water Keeping the rural developing target audience in mind we will also aim to make it as easy to use as possible without requiring any special assembly or know how Our Proof Of Concept model will consist of the following features A physical mesh filter to catch the bigger impurities and particles A self powered UV light based filtering system to kill other bacteria viruses A gear system to ensure
9. conditions 4 2 Electrical Requirements R48 B R49 B R50 B The wattage of the permanent magnet DC motor shall be higher than the wattage needed for UV bulbs for safety 12 v DC 80 watt permanent magnet motor will be used to generate 11 V to 13 V to charge a lead acid deep cycle battery and to feed the 12 V bulbs Maximum current should not exceed 6 A the nominal rate of 80 watt 12 volt DC motor aquaQuick Filtering Solutions Transmission Module The gearing of the product is to transmit the rotation of the wheels to the rotor of the generator Also it is so important to increase the RPM of the generator to the required rotation speed By changing the diameter ratio of gears we can change the generator speed which will increase the amount of the generated voltage and current 5 1 General requirements R51 B The diameter ratio of gears will be calculated according to the required RPM of the generator and will be between 11 to 13 voltages R52 B Average speed of the wheels is an important factor to calculate the diameter ratio of gears 5 2 Physical requirement R53 B Gears will be fixed between the wheels shaft and the generator R54 B Gears module will consist of 3 gears The rotation will be transferred from wheel shaft gear to generator gear through a third gear lt aquaQuick Filtering Solutions Water Treatment Module Ultra violate bulbs will be used to disinfect water UV is 20
10. ight up Sand Filter Testing This is the first component where water is filtered initially to filter the larger impurities in water This will be done by physically passing relatively dirty water and visually inspecting the water on the other side for clarity 9 2 Integrated Testing In addition to the testing of individual components a recursive integration testing will be done after completion of assembly A complete simulation of the product will be done to ensure product does what it is intended to Each complete system with wheels will be simulated on a belt while the top is held so only the wheels rotate Firstly impure water will be tested using a water testing device to ensure bacteria are present in water Water will be poured into the containers through the sand filter and will be visually inspected that larger impurities are removed Once the container is filled the belt will start rotating the wheels which will go through the generator and charge the battery Within minutes all the UV bulbs will be visually inspected to see if they are lit up After the cart has travelled enough distance calculated using wheel s RPMs and time water will be tested using the same water testing device to ensure that bacteria and other microorganisms have been killed In addition we will also do sub component testing of the generator and the battery to ensure they work together and are producing the expected energy 12 aquaQuick
11. ments R38 B PFS shall be able to kill over 90 bacteria in water R39 B PFS shall be able to transport water in most road conditions R40 B The total time of water treatment shall be no longer than 1 hour 3 10 Usability Requirements R41 C Each component of PFS shall be changeable and upgradeable by majority R42 B The UV light from water treatment module shall not affect the taste of water R43 B The water container shall be rust proof lt aquaQuick Filtering Solutions The Generator The generator provides the power required to feed the ultra violet bulbs The mechanical energy of the wheels will be used to rotate the rotor of the generator through the gear module A permanent magnet DC motor will be used as a generator The voltage and power of the generator should be enough to feed the UV bulbs with the current needed The cart will be dragged by hand which makes the RPM of the wheels relatively slow So the generator is chosen carefully to generate the required voltage at low RPM 4 1 Safety Requirements R44 B R45 B R46 C R47 B RPMs of the generator should not take the generated output above the c current limit in order not to overheat the generator RPM shall not generate voltage more than 12 DC voltage in order to not shorten battety life Motor should be well placed to be protected from outdoor conditions Wiring connector of the motor should be insulated and protected from weather
12. t to protect the generator the load and the user 7 1 General Requirements R62 B R63 C R64 B All electrical components will be complying with IEEE standard All components should be protected from outdoor weather condition The thickness of wires shall be longer than needed for more safety in case of high current 7 2 Electrical Requirements R65 B R66 B R67 C R68 B R69 C 12V 33AH Deep Cycle Sealed Battery will be used to store the energy and to stabilize the Dc voltage supplied to the UV bulbs Blocking diode shall be used rated for 6A to prevent reverse current from flowing back into the generator from the battery Charger controller will be used to protect the load and battery from overcharging when the wheels rotation increased 1 5 A Fuse should be used to protect the battery from high current There should be a switch for the circuit to isolate the load from the circuit 10 s aquaQuick Filtering Solutions Documentation and Manuals R70 B The detailed user documentation should consist of a user manual as well as a setup guide R71 B Both the user manual and the setup guide will be available on the company website R72 B All documentation shall be available in different languages and will be translated into new ones as required R73 B All documentation will be written while keeping our audience in mind and will have minimum technical details R74 B The manual will ha
13. ticeable saquaQuick Filtering Solutions 3 5 Environmental Requirements R19 B R20 B R21 B R22 B PFS shall be able to operate at temperatures between 0 degrees Celsius and 60 degrees Celsius PFS shall be able to operate at humidity between 10 and 80 PFS shall be able to operate at altitude up to 2500m PFS shall be used both outdoors and indoors 3 6 Standards PFS shall conform to CGSB 44 232 2002 standards Ref 1 PFS shall conform to ANSI standards PFS shall conform to CSA ISO 9241 5 00 Ref 2 PFS shall conform to BIFMA standards PES shall conform to IEC 61000 3 7 Reliability and Durability R28 B R29 B R30 C R31 B R32 B PFS shall be able to work properly day by day PFS shall be resistant to mechanical crash damage caused by users PFS shall be serviceable by majority The life hours of UV light bulb in water treatment module shall be no less than 10000 hrs The life hours of wheels in gear system shall be no less than 10000000 hrs 3 8 Safety Requirements R33 B R34 B R35 C R36 B R37 C PFS shall be no bodily harm to the users PES shall not be inflammable and explosive The electronic components and ports shall be enclosed PFS shall be no negative effect to the quality of water PFS shall be able to detect electrical failure and the system will alarm once there is an error lt aquaQuick Filtering Solutions 3 9 Performance Require
14. ve minimal text and will be focused on pictures to convey the message System Test Plan This section will describe the testing process that each device will go under to prove that it meets the specifications In addition to visually inspecting each component folowing additional tests will be done 9 1 Component Testing Before integrating individual components to the system each component will be individually tested to ensure that it is not faulty or damaged Generator Test The generator used to convert mechanical energy to electrical energy will be tested by manually rotating the mechanical side and measuring the voltage using digital millimeter to ensure the expected voltage output is produced Battery Test Each battery will be tested by being plugged into the outlet and let it charge fully Once it is charged the time it took will be compared the expected time We will then use the digital millimeter to ensure the expected output is produced Wheels and Gear test Before integrating the gear system and the wheels to the system we will ensure the gear ratio is within the expected limits This will be done using a Tachometer to measure RPMs on the small gear and the RPMs of the wheel and calculate the ratio 11 s aquaQuick Filtering Solutions UV Bulbs Each UV bulb will be tested individually This will be done by simply putting the bulb in a simple circuit with a 9V source and visually ensure that the bulb will l
15. wheels The wheels are attached to a motor through a Powers Generator and Charges series of wheels Figure 2 2 to ensure that adequate RPMs dd are achieved independent of the speed of the walker this can be simulated by increasing or decreasing the speed of the wheels The rotation then powers a motor that in turn Heats up the call and Boils powers on a series of bulbs that emit UV light that kills all Water bacteria and viruses present in the water Filtered Water Figure 2 1 System Overview Once the user has reached its destination clean water can be easily obtained through a conveniently located tap at the bottom of the container aquaQuick Filtering Solutions The following figure 2 1 shows how our gear system will work in order to achieve higher RPMs at driven gear G2 utilizing concept of gear ratio The permanent magnet motor works as a generator to convert mechanical energy into electrical and will charge a battery for later use by the UV bulbs Generator al Figure 2 2 Gear System and Generator Overview Since our product performs only one basic function i e filtering we will not have well defined development phases We will first focus on getting the filter to perform as we require it to and then the rest of the time will be spent on making the device as user friendly and durable as possible aquaQuick Filtering Solutions Overall System Requirements 3 1 General Requirements R1
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