Alec Calhoun Eric Eiermann Patrick Neely Brett Burleigh

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 100 Ah of energy that may come from 1, 2, or 3 12 V DC power generation devices at any one time • 12 V DC, 5 A output receptacle • 120 V AC, 60 Hz, 5 A 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 charged Image courtesy of Sun. Force. Products. 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

• 1500 Watts / 12 Volts = 125 Amps for battery • Depth of Discharge – 50% a common standard to extend battery life • 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 Amp. Hours – 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: 12 V or 24 V 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

Square Wave Inverter • Hard to Find (Basically Obsolete) • Inefficient – 1 st 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

Modified Sine Wave 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.

Pure Sine Wave Inverter • Produces an Identical output to a Home’s Electrical Output • Can be used with any device or load • Most Complex and costly to build

• • 120 V AC, 60 Hz, 5 A Inverter 2 HEX Inverters 4 Resistors 1 Variable Resistor (Set to 1. 24 kΩ) • 1 NPN Transistor • 1 P-Channel MOSFET • 1 N-Channel MOSFET

• 12 V Regulator • Up to 5 A current • 3 TIP 2599 Power Transistors • 15 A Bridge • Capacitors as Filters

• Model: Atmel Atmega 168 -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 • 84 mm x 44 mm

Research and Design Parts Acquisition Prototyping and Construction Testing 90% 50% 10% 0% Overall 40%