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Sketch Model Review Purple B

Sketch Model Review Purple B. +. Need Statements. A low-cost, practical irrigation system to facilitate the growth of agriculture. An inexpensive power source for rural farmers. Product Concepts. Water pump Draws water up from well Pressurizes water for irrigation Bicycle Power Source

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Sketch Model Review Purple B

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  1. Sketch Model ReviewPurple B +

  2. Need Statements A low-cost, practical irrigation system to facilitate the growth of agriculture. An inexpensive power source for rural farmers.

  3. Product Concepts • Water pump • Draws water up from well • Pressurizes water for irrigation • Bicycle Power Source • Power transmission from bicycle to gear train • Potential for modular attachments • Fly wheel stores energy

  4. Competition • Variety of pumps already exist • Hand pumps • Foot pumps • ApproTEC – MoneyMaker foot pump • Markets to East African nations • 38,000 pumps sold • No bicycle-powered pumps marketed to developing country farmers

  5. Customer Data - India • Population – 1.09B people ~110M agricultural workers ~100M bicycles • Economic Impact • GDP per capita = $3100 • agriculture accounts for 22% of GDP • 58% of population depends on agriculture for livelihood • Weather • Reduces risks from droughts and monsoon flooding • Political • Indian PM recently stressed need to improve irrigation (September 27, 2005 - news.yahoo.com)

  6. Market Growth • Growing demand for irrigation in India • As of 2000, only 43% of food-grain growing land was fully irrigated • India is only one case study – many others countries could benefit. www.indiaagristat.com

  7. Critical Module #2: Bicycle Power Transmission • FEATURES • Fits most any bicycle • Gear train transmits energy to modular attachments • Weighted flywheel increases system momentum and stores energy • WHAT WE LEARNED • Stability is an issue • Power transmission system? • Adjustability

  8. Future Work • Pump • Explore other pump styles • Wheel/Power Train Interface • Connection between rear wheel and gears train • Flywheel • Bicycle Stand • stability

  9. Questions?

  10. Factoids • 150W 12gallons/min @ 60ft head • Assume 75% Efficiency 9 gallons/min • Need 200 Strokes w/ Piston Diameter 2.5” • Pedal Ratio 4:1 50RPM • 316N to pull 10m • Piston Lever/Crank Lever Ratio = 10:1 • Piston/Pedal Gear Ratio = 4:1 • Need 123N at Pedal • Force=123N, Distance = .5m • W=50J/s • 2 Pedals 100W Needed

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