Alec Calhoun, Eric Eiermann, Patrick Neely, Brett Burleigh

Group 5

• Let’s Make Green Power More Practical– Hurricane / Natural Disasters

– Emergency Power

– Portable Power / Remote Power

• Ultimately:– Ease of Use to bring Green Power to the masses!

• Flexibility / Portability:– Multiple Input Types, Multiple Output Types

– Inputs are interchangeable

– Portability for Remote Power applications

• Familiarity:– Common interfaces that the public has seen before

– Provide the most commonly used output voltages

• Efficiency:– Small amounts of power being generated

– Indication to user. Not efficient to keep charging a full battery.

• Store a total of 100Ah of energy that may come from 1, 2, or 3 12V DC power generation devices at any one time

• 12V DC, 5A output receptacle• 120V AC, 60Hz, 5A output receptacle• The Green Box shall be less than 60 cubic feet in

size, and weigh less than 170 lbs• Wheels and handles shall be incorporated

• Solar, Wind and Human Power

• Interchangeable– User selects desired method(s) of power generation

– Adaptable for various locations, climates and seasons

• Portable– Lightweight

– Small footprint

Model: SUN-100 (M)• Advantages:

– Monocrystalline Silicon construction– Size (L x W x D): 42-1/2” x 31-3/8” x 1-3/8”– Weight: 30 lbs.– Cost: $2.78 per Watt

Image courtesy of Sunelec.com

Model: SUN-100 (M)• Electrical

Characteristics:– VOC = 23.60 V– ISC = 6.30 A– VMP = 18.10 V– IMP = 5.53 A– 100 Watts of Maximum

Power

Southwest Windpower Air-X Turbine• Advantages

– Size (L x W x H): 27” x 15” x 9”

– Weight: 17 lbs.

– Durability: 110 mph survival wind speed

– Fully Integrated Regulator Included

• Provides automatic shutdown when

battery is fully chargedImage courtesy of

SunForceProducts.com

Southwest Windpower Air-X Turbine• Electrical Characteristics

– 12 VDC output– 8 mph start-up wind speed– Rated for 400 watts at 28 mph

AMETEK PMDC Motor• Advantages:

– Low RPM for desired voltage

– Weight: 7 lbs.

– Cost: $170

Human Power Mechanism• Fabricated from an old bicycle

• Final build to be compact and portable

AMETEK PMDC Motor• Electrical Characteristics:

– Rated for 38 V at 1100 rpm

• 14.5 V at approximately 420 rpm*

– Current rating: 12 Amps

(*)Note: rpmnew = Vdesired * rpmrated/Vrated

• Testing of each input to be performed using a digital multimeter– Testing to be performed on site– Voltage and current

• Inputs to then be used as part of testing plan for the charging system

• Power Storage Requirements– Store all the power generated in a single day

• Full Charge & Discharge Cycle = Maximum Efficiency

– Able to be charged quickly• To harness all available power

– Need to calculate the size of battery• Reduce cost

• Maximize Efficiency

• Maximum Power Production

• Realistic/Average Power Production

• Depth of Discharge – 50% a common standard to

extend battery life

• 1500 Watts / 12 Volts = 125 Amps for battery

•Lead Acid Batteries store a great deal of energy, but which one?

• 3 Types of Lead Acid Batteries

- Starting• Large Current, but only for Short Duration• Would only last 30 days in our application

- Marine•Thicker Plates•Durable, but still inferior

- Deep Cycle•Thickest Plates •Most durable of all Lead Acid Batteries

• 3 Types of Deep Cycle Batteries

- Flooded, “Wet”• Battery Acid / Fumes can escape into consumers home• Cannot be shipped UPS, USPS, and others

- Gel Cell• Heaviest• Most Expensive

- Absorbed Glass Mat• Fast Recharge• Will not spill acid, even if cracked• Slow Self-Discharge Rate • Most popular Choice in Alternative Energy

• Specifications:– Voltage: 12 Volts– Rating: 100 AmpHours– Dimensions:

14 x 10 x 8 inches– Weight: 74 Pounds– Cost (New): $280

• The AGM battery must be charged by a strict algorithm

• A sophisticated charge controller must be used– To prevent damage– To prolong life

• Model: Xantrex C-35– Voltage: 12V or 24V– Max Current: 35 amps – Weight: 2.5 Pounds– Size: 8 x 5 x 2 Inches– Cost: $100 Each (*Need 3)– Features:

• Microprocessor Control• Pulse Width Modulation• AGM Compatible • Solar & Load Diversion Modes

• Hard to Find (Basically Obsolete)

• Inefficient– 1st Harmonic results in high Total Harmonic Distortion (THD)

• Inductive Loads shouldn’t be operated with Square Wave Supply because of Abrupt Changes in waveform.– Can damage load, therefore damaging inverter

• Next Step in Efficiency

• Reduces Total Harmonic Distortion

• Clearer Signals from Inverter

• Building this type will require more and costlier parts

• Still not best choice for desired loads.

• Produces an Identical output to a Home’s Electrical Output

• Can be used with any device or load

• Most Complex and costly to build

• 120V AC, 60Hz, 5A Inverter• 2 HEX Inverters• 4 Resistors• 1 Variable Resistor (Set to

1.24kΩ)• 1 NPN Transistor• 1 P-Channel MOSFET• 1 N-Channel MOSFET

• 12 V Regulator• Up to 5A current• 3 TIP 2599 Power

Transistors• 15A Bridge• Capacitors as Filters

•Model: Atmel Atmega168-AVR enhanced RISC architecture-20 MIPS @ 20 MHz-16 KB Flash Memory-10,000 Write/Erase Cycles-23 Programmable I/O lines-32 8-Bit Registers

• Batron 2-Line Alphanumeric LCD

• 16 x 2 Character Display• Operating range:

0 -> 50° C• 84mm x 44mm

Research and Design 90%

Parts Acquisition 50%

Prototyping and Construction 10%

Testing 0%

Overall 40%