POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR THE CLIENT Kinkajou Microfilm Projector (projected 10,000+ units) THE NEED 5-15 Watt Off-Grid Power Supply lightweight portable durable environmentally conscious reliable cost effective ($25 target) 10:1 use to charge ratio Kinkajou’s targeted use in developing countries necessitates that power be provided independent of an electrical grid. It is representative of a range of low-power appliances that are too big for a hand-crank and too small to justify the cost of solar power. Extremely ambitious target cost of $25. Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR THE POWER REQUIREMENTS Voltage 12 V DC Current 1.0 A Min. continuous duty cycle 2 hrs Reliability 10,000 hrs MTBF The most common power source found in Mali, where the Kinkajou has been field tested, is a 12 V DC lead acid battery, typically used in car/truck or motorcycle applications. Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR INVESTIGATED POWER SUPPLIES & CONS 15 W Solar Panel Cost ($130 total) Bicycle powered generator Low reliability, overall size Hand crank 3:1 use to charge ratio Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR BICYCLING VERSUS ROWING Curve 1 – cycling Curve 2 – free rowing w/ fixed feet Curve 3 – forced rowing w/ fixed feet Curve 4 – free rowing w/ fixed seat Curve 5 – forced rowing w/ fixed seat The bicycle use human muscles in a near-optimum way. The curves for rowing lie considerably below the cycling curve for short durations but above it after less than one minute. Rowing endurance is less when the feet are fixed rather than free to move. Forced rowing is higher than free because of conservation of kinetic energy. Source: Bicycling Science, David Gordon Wilson Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR THE TYPICAL ROWING MACHINE Utilizes leg and arm power. Seat positioned slightly higher than feet. Feet fixed, seat free. Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR REDESIGNING THE TYPICAL ROWING MACHINE 85° 75° 65° For portability, frame of reference changed to seat. Various angles tested for ergonomics. foot positioning free fixed Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR THE PRELIMINARY DESIGN battery charge indicator retractable handle foot straps Talk about how it fulfills the needs. (back panel) power outlets lockable wheels Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A

POWER GENERATION IN DEVELOPING COUNTRIES KINKAJUICE : HUMAN POWERED GENERATOR THE PRELIMINARY DESIGN Do a diagram with arrows. not sure how it works so you can move stuff around. Keith Durand / Christine Lin / Smitha Raghunathan YELLOW TEAM A