Human Powered

Dustin Drake, Alfonso Liguori, Jeremy Smith

Florida Atlantic UniversityDepartment of Ocean and Mechanical Engineering

Modular SystemProviding Basic Needs for Developing Countries

Problem

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.

Human Powered Modular SystemCreate

Human Power Supply

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

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

ModulesWater Filtration

Electricity Generator

Irrigation Pump

Millstone

Reverse OsmosisPurifies water

Highly efficientRelatively low cost4 stages of filtration

Sediment filter Activated carbon filter RO membrane Activated carbon filter

Numerical AnalysisPower requirement:

P = Q*p(P: Power, Q: volumetric flow rate, p: pressure)

p = 100 psiQ = 19 gal/hr

P = 0.019 HP

UV PurificationDisables reproduction of bacteria and virusesRO system filters out

UV Numerical Analysis

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)

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

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