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Human Powered
Dustin Drake, Alfonso Liguori, Jeremy Smith
Florida Atlantic UniversityDepartment of Ocean and Mechanical Engineering
Modular SystemProviding Basic Needs for Developing Countries
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Problem
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Global Water CrisisOne billion people do not have
access to clean drinking water.
3.6 million people die each year from water-related diseases.
98% of water-related deaths occur in the developing world.
A person can only live for a few days without water.
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Human Powered Modular SystemCreate
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Human Power Supply
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Human Power SupplyFor long duration / low intensity operations
Human input = 0.1 hp Very sustainable for a healthy person Short duration / low intensity operations will not
overly tire the operator
For Short duration / high intensity operations Human input = 0.2 hp Sustainable for durations less than 3 hours Will leave the operator very tired after extended
operation
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Human Input MechanismGoals
Must comfortably seat a human for extended durations
Highly efficient transfer of mechanical energy
Design Criteria Portable Rigid Construction Multiple gear ratios
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ModulesWater Filtration
Electricity Generator
Irrigation Pump
Millstone
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Reverse OsmosisPurifies water
Highly efficientRelatively low cost4 stages of filtration
Sediment filter Activated carbon filter RO membrane Activated carbon filter
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Numerical AnalysisPower requirement:
P = Q*p(P: Power, Q: volumetric flow rate, p: pressure)
p = 100 psiQ = 19 gal/hr
P = 0.019 HP
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UV PurificationDisables reproduction of bacteria and virusesRO system filters out
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UV Numerical Analysis
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Electrical Generation ModuleGoal
Charge various types of batteries up to 12V Provide a source of low current DC electricity for
high efficiency light sources (LED based)
Design Criteria Human input = 0.2 hp Expected efficiency = 30% Expected output = 4 Amps (for 12V)
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Irrigation ModuleGoal
Obtain unfiltered water from a remote source. Flow enough water to irrigate a small field
Design Criteria Flow Rate, Q = 5 GPM Well Depth = 100 ft Human Input = 0.18 hp Reliable Long pump life Simple to maintain
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Grist Mill ModuleGoal
Use human input to grind grain
Design Goals Must accept various types of grain Must be able to provide different levels of grind
fineness Fine grinds to produce flower Coarse grinds to provide cornmeal
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