Team MulberryAndrew Smith, Joseph Entler, Bill Miller

Project Proposal Overview

• PV array at Phoenix International Airport• Goal: Using savings from current array:– Reduce grid consumption by adding arrays– Minimize additional space required by additional

arrays– Set a 20 year plan to install arrays• Have 100% of power consumption at airport come from

solar arrays

Location Specifics

• Phoenix, Arizona• Coordinates– 33 degrees 26’ 03 N– 112 degrees 00’ 42 W

• Largest Airport in Southwest– 9th largest in United States

Weather

• Near ideal climate for solar power• High Irradiance

• 85% of Sunshine annually– 211 days of clear skies

• Between 10 and 14.5 hours • Clear skies 86% of the time

Weather (cont.)

Solar Data

• Direct Nominal- Annual– 2518.6 kWh/m2

• Global Horizontal- Annual– 2117.0 kWh/m2

PV Technology (SunPower E20 Series)

• SunPower SPR-435NE-WHT-D• 21.06% Efficiency• 1 x 2.067 meters• Roughly 392 strings of 6 panels

Inverter Technology (Satcon Equinox)

• Satcon Technology Corporation• 2 x EQX0500US480T 480V [CEC 2012]

Environmental Considerations

• Environmental Impact– Aircraft Emissions

• 165,319 lbs CO2/A320 aircraft(full tank)

• 2.09 x 108 lbs CO2/A320 aircraft (full tank)• 7.64 x 1010 lbs CO2/year (full tank)

– Solar Offset Emissions• 1.2 lbs CO2 / kWh

• No noticeable impacts with solar when we compare to alternatives

Long Term Goals

• Use the 4.7 million that will be saved from the 2008 array project to build additional arrays

• Offset the emissions of the year round aircraft traffic for the future and improve air quality

• Have a sustainable energy source that would lower annual energy costs

• Provide a project that can be reproduced at similar locations

Building Specifics

• Roof of Airport Hangers/Terminals• Horizontal plane• Little to no shade • Large area to build on (Est. 20,000 m2)

Array Details• Current Array

– 5.4 MW high efficiency– 16,000 solar panels

– Offsets 1000 cars per year of emissions• Array size to be repeated

– 1.9 MW high efficiency– 4861.6 square meters

– 2352 solar panels

System Cost

• Each Array project cost– 4,239,287.29

• Additional project will be based off of savings from previous projects– Increasing in size and payback each year

Life Cycle Analysis

• $556,199.51 NPV/LCS at year 20

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

$5,000,000.00

$4,000,000.00

$3,000,000.00

$2,000,000.00

$1,000,000.00

$0.00

$1,000,000.00

$2,000,000.00

$3,000,000.00 Cash Flow in PV$ Solar Savings

LCS: $124

3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

$5,000,000.00

$4,000,000.00

$3,000,000.00

$2,000,000.00

$1,000,000.00

$0.00

$1,000,000.00

Cumulative Solar Savings

Payback

• Array #1 – $4,239,287.29– 5.5 years

• Array 2-10– Payback would dramatically decrease with added

arrays

Financial Overview

• $4,239,287.29• Analysis Period: 20 years• Discount Rate: 3%• Inflation rate: 2%• Nominal discount rate: 5.06%• Federal Income : 35%/year• State Income: 6.7%/year• Sales tax: 0% (Incentive)• Insurance: 0.5%

• Incentives• $0.04/kWh (PTC)• 30% (Fed ITC)• 10% (State ITC)• $1.75/W (CBI)• $0.14/kWh (PTI)

Conclusion

• It makes financial and environmental sense to proceed with project

• Payback is within a feasible period (5.5 years)• This project fits into the city’s priorities of increasing sustainable energy while savings

money• Allows for savings to be spent on more array

or sustainable projects