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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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