P15482: Breadfruit Shredder and Grinder Brittany Griffin, Sam Huselstein, Alan Kryszak, Pat Connolly, Andrew Beckmann Agenda Quick Background - Updated Engineering Requirements - HOQ System Design - Functional Decomposition - Energy Flow - Benchmarking - Concept Generation System Design Selection - Selection Criteria - Concept Selection - Feasibility Analysis - Architecture Risk Assessment Updated Project Plan Quick Background ● ● ● ● Haiti Breadfruit FouFou Shredder and Grinder Customer Requirements Customer Requirements Engineering Requirements Engineering Requirements F1 = Contain Breadfruit F2 = Collect Processed Breadfruit F3 = Shred Breadfruit F4 = Grind Shreds Feasibility Question: How much flour can be made from one breadfruit? Assume: Breadfruit is 70% water by weight, peel and core weigh approximately 0.2lb, shreds are completely dry (100% water reduction) Analysis: 3 breadfruit = $10.00 1 breadfruit = $1.98 Therefore: 1 breadfruit = 1.67lb 1.67lb * 0.7 = 0.5lb of dried fruit 0.5lb – 0.2lb = 0.3lb One breadfruit yields approximately 0.3lb of flour. HOQ This format only allows 25 ER’s...we will need to reformat or eliminate some ER’s to make a complete HOQ. Functional Decomposition Critical! Shredder Decomposition Grinder Decomposition Energy Flow Benchmarking for Functions-Shred Ribbon Fry Cutter http://images.zesco.com/pimages/518/518-d-039.jpg Apple Peeler http://ecx.images-amazon.com/images/I/7185U2IiWPL._SL1500_.jpg Benchmarking for Functions-Shred Shredding Rollers Blade Array http://www.lenzingtechnik.com/fileadmin/_processed_/csm_grobhomogenisator_01_fc818f2f51.gif http://www.chefscatalog.com/img/products/285x285/99884_285.jpg Benchmarking for Functions-Shred Apple Peeler with Cutter http://en.wikipedia.org/wiki/Cam#mediaviewer/File:Nockenwelle_ani.gif http://tclauset.org/16_StGuides/ch13/picts/applepeeler.jpg Benchmarking to Function - Grind Roll Crushers http://www.scribd.com/doc/30156582/Chapter-6 Benchmarking Functions - Grinder Mortar and Pestle Hammer Mill http://i.ebayimg.com/00/s/NjUwWDY1MA==/z/DNoAAOxygPtS5q4j/$_35.JPG http://www.responsiblebusiness.eu/download/attachments/2588750/hammer+mill.jp g Benchmarking Functions - Human Power Bike Power Hand Crank http://www.lowtechmagazine.com/2011/05/pedal-powered-farms-and-factories.html http://www.prestowind.com/store/image/39og3/Hand_Crank_Generators_-_Wind_Generators__Survival_and_Emergency_Products_Crank-a-Watt_TM_Deluxe.jpg Concept Generation Concept Generation Concept Generation Selection Criteria ● ● ● ● ● ● ● Doesn’t use electricity Available in Haiti Easy to maintain/sharpen cutter Effort required to operate Easy to understand Within budget Peels and cores (bonus) Pugh Diagram Round 1 Datum Alan 1 Alan 2 Alan 3 Andrew 1 Andrew 2 Andrew 3 Sam 1 Sam 2 Sam 3 Brittany 1 Brittany 2 Pat 1 Pat 2 S + + S + - S + S + S + - S + S S - S S + + S S + S + + S + - S + S S - S + S + S - S S + + S S - S + S + S + - S S + + + S - S S + + S - S + - S S + + - Sum + 3 3 1 3 3 1 2 2 3 3 2 1 2 Sum S 2 3 3 4 2 3 3 4 3 3 3 1 2 Sum - 2 1 3 1 2 3 2 1 1 1 2 5 3 MET Does it use electricity? Avail. in Haiti: Shredder Avail. in Haiti: Grinder Easy to maintain & sharpen / / / / Effort to operate / Easy to understand / Within Budget / Peels & Cores (Bonus) / Feasibility Question: Will grinding rollers need to be replaced? Assume: Industrial rollers can be compared to style used by team, rollers used constantly for 3 months/year, Force from industrial motor > force generate from human power Analysis: Team goal: Product life of greater than 3 years. 2 Manufacturers contacted through phone. Rollers in mills must be replaced after several years in industrial applications Since our application will only have heavy usage for 3 months every year and with less force than used in industrial applications, it is safe to assume the rollers used in our design will not need to be replaced during the lifetime of the product. Feasibility Question: Will the grinder used in Pat 2 be cost effective? Assume: Grinder type already exists, online specifications are accurate Analysis: Country living grain mill Material: high carbon steel burrs – should not need to be replaced Advantages: • Will not gum up if shreds are too moist • Adjustable coarseness • Easier than stone grinders Disadvantages: • Will not grind as fine as ceramic grinders • Slow and tiring when done by hand ** not as heavily weighted Cost for new set of grinders: $91.47 Feasible: This is a feasible design, however, would be more costly than other options www.onlygrainmills.com/country-living-grain-mill/ www.einkorn.com/grinding-einkorn/ Feasibility Analysis ● How much force is required to grind dried breadfruit? ● Once a particle size is selected we can estimate the grind roller capacity and the force needed to crush the particles. https://html1-f.scribdassets.com/18nnuf2o1sjeg0m/images/3-9d3751ac00.png Pugh Diagram Round 2 MET Alan 1 Alan 2 Andrew 1 Andrew 2 Sam 1 Sam 2 Sam 3 Brittany 1 Brittany 2 Pat 2 Does it use electricity? Avail. in Haiti: Shredder Avail. in Haiti: Grinder Easy to maintain & sharpen / S S S S S S S S Datum S / + + + + S S + S Datum S / S + S S S S + S Datum S / + + + + S + + S Datum S Effort to operate / - - + - + + - + Datum + Easy to understand / S - S S - S S S Datum S Within Budget / + S S S S - S S Datum - Peels & Cores (Bonus) / S S + S S S S S Datum S Sum + 3 3 4 2 1 2 3 1 Datum 1 Sum S 4 3 4 5 6 5 4 7 Datum 6 Sum - 1 2 0 1 1 1 1 0 Datum 1 Pugh Diagram Round 3 Andrew 2 Sam 2 Sam 3 Team 1 Team 2 APPLE PEELER w/ RIBBON FRY Hand Trimming Crank. Pedal mechanism AND POWERED ROLLERS; ROLLERS HANDCRANK Does it use electricity? Avail. in Haiti: Shredder Avail. in Haiti: Grinder Easy to maintain & sharpen / S DATUM S S S / + DATUM + + + / S DATUM + S S / S DATUM + + + Effort to operate / - DATUM - - - Easy to understand / S DATUM S S S Relative MSD cost / S DATUM + + + Peels & Cores (Bonus) / S DATUM + + S Sum + 1 DATUM 5 4 3 Sum S 6 DATUM 2 3 4 Sum - 1 DATUM 1 1 1 Selected Concepts Architecture Team 1: Apple peeler with trimming mechanism and grinding rollers MSD team Hand crank Overall machine structure Haitian farmers Haitian farmers Shredder Container Grinder Container Quality test Architecture Sam 2: Shredding rollers and Grinding rollers MSD team Haitian farmers Haitian farmers Shredder Container Bike power Grinder Container Quality test Overall machine structure TRIZ ● Mechanical mortar and pestle Benchmarking: ● Highly technical design ● Uses motors ● High quality (expensive) materials Quick Feasibility: ● Difficult to make tolerances needed ● Difficult to scale to larger size ● Materials most likely will not be available in Haiti ● Design would be robust and would need to be prototyped to determine if flour quality grain sizes are plausible. http://www.retsch.com/uploads/sl/23747f6755854fd697495c7a8201dd93.jpg Risk Assessment Risk Assessment Updated Project Plan What could we learn from a trip to Haiti? ● Possible market value of our product ● Most/Least popular aspects about our design ● What type of environment our product will spend a majority of its life ● What materials are actually available in Haitian markets Questions? • Do you have any design concerns?