SOLAR POWER SYSTEM FEASIBILITY STUDY,AND REPORT FOR A MUSEUM

Presented byAbiola AdesekoHamid Mohseni

Sandeep TripuraneniCharan Reddy

OVERVIEW

• Introduction• Background of study• Technical Analysis• Financial Analysis• Recommendation

INTRODUCTION

Figure 1: present state of the Museum rooftop in Boston.[1][1] Google Earth

GOALS OF THE REPORT

• To research and report the feasibility and associated benefit for the museum installing PV system.

• To determine the best location for installation• To determine the cost associated for the

museum by installing a PV system to meet 25 percent of energy need.

SITE BASIC PARAMETERS

Parameters

Project type Commercial

Town located Boston

State located Massachusetts

Latitude 42.32

Longitude -75W

Dry temperature 10.3

Elevation from sea level 151 ft

Roof Access Location Stairwell

Buildings number of stories Three

OWNER’S RATIONALE

• To save cost by reducing energy consumption• To promote renewable energy among

the museum audience• To have a renewable source of

energy.

BUDGET

• 50% of the project will be loan collected from a financing agent (Bank) and the museum will supply the remaining cost• The total amount put forth was

approximately 300,000 dollars

SERVICING UTILITY

• Purchase it energy from National Grid• Rate of 0.15 dollars per kilowatt hour• Annual energy consumed is estimated as • Under the rate Large General, Time of Use

(TOU), (SC-3A) “when the monthly demand exceeded 2000 kilowatt in any two consecutive for 12 months.[www.nationalgrid.com/rate of charges]

TECHNICAL ANALYSIS

• Site characterization• Recommended system size due to site

constraints• System overview• 1-line diagram• Datasheets of module and inverters• Interconnection points.

SITE CHARACTERIZATION

Figure 2: monthly irradiance of Boston in kW/m2/h[2][2] Wikipedia.com/Boston/radiation.

SHADING CONSIDERATION OF SITE

Figure 3: Shows the sun path with no shading [3] [3] Pvsyst Stimulation software.

ROOF ORIENTATION AND SHAPE

Build orientation

Roof orientation true south

Roof azimuth 180

Roof type Structural concrete

Total roof area 34617 ft2

Shading factor Shade-free

Total roof area 2506 ft2

Roof mount equipment and object Heating ventilations, and air conditioning

Roof top utilities Water line and Electricity

Roof surface flat

Table 2: Showing the basic characteristics of the roof.

RECOMMENDED SYSTEM SIZE

• Due to availability of roof-mount utilities, there wasn't enough roof on the museum for our installation, we recommended a system size of 65kWp

14

USABLE AREA

System Overview

Figure 4: Average amount of energy produce by 65kWp [4][4] SAM (System Advisor Model

16

SIMULATION WITH DIALUX SOFTWARE

17

SIMULATION WITH DIALUX SOFTWARE

1-LINE ELECTRICAL DIAGRAM

SCHEDULE OF COMPONENTComponents Components Manufacturer Quantity

Solar PV modules JinkoSolar, 290Wp220

Combiners boxes Solarbos 2

DC-disconnect Solarbos 2

Inverter Solectria 60kW 1

AC-disconnect Sunny D,HU364RB 200A 600V, 3-

Pole

1

Racking system Polar Bear 111 220

DATASHEETS FOR MODULE AND INVERTER

Figure 5: Shows module data sheet

INVERTER’S DATASHEETSpecifications PVI 60KW

DC Input

Absolute Maximum Input Voltage 600 VDC

MPPT Input Voltage Range 300-500 VDC

MPPT Input Voltage Range-Low Voltage Option 285-500 VDC

Maximum Operating Input Current 211 A

Maximum Operating Input Current-Low Voltage Option 222 A

Strike Voltage 400 V

Strike Voltage-Low Voltage Option 380 V

AC Output

Nominal Output Voltage 480VAC

AC Voltage Range(Standard) -12%/+10%

Continuous Output Power 60 kW

Continuous output current 480 VAC 72 A

Max. Back feed Current 0 A

Nominal Output Frequency 60 Hz

Output Frequency Range 57.0-60.5 Hz

Power Factor 1.0

Total Harmonic Distortion(THD) <3%

FINANCIAL ANALYSIS

• Installation cost• Hard cost• Soft cost• Available intensive• Net system cost

FINANCIAL ANALYSIS

• Hard Costs(All components costs)

Overall hard costs = 2.20 $/wTotal hard costs for the system = $ 143, 000

Hard Costs

$ 1 per watt

$ 0.68 per watt

$ 0.52 per watt

Hard Costs

Panel costs

Inverte costs

BoS

• Soft Costs:Normally these include permits, labour costs, cost

to design the system , customer acquisition.

Overall soft costs : 2.30 $/w Total soft costs for the system: $ 149,500

Soft Costs

pi and marketingLaborOverhead

$ 0.9 per watt

$ 0.7 per watt

$ 0.7 per watt

• Total system cost = $ 292, 500

Cost per Watt

Hard CostsSoft Costs

Applicable Incentives:-

Federal Tax Incentives:

-Business Energy Investment

Tax Credit(ITC): 30%($ 87,750)Net system cost: $ 204,750 Other types of incentives:-

SREC’s: 85 (for annual energy production of 85,921 kWh)

SREC auction value: $ 274

Income due to SREC’s:$ 23,290

Modified Accelerated Cost Recovery System (MACRS):-

Assigned property class- 5 YearsYear Accepted

Depreciation Rate

Tax Deduction Cash Benefit of

Depreciation1st Yr 20% $ 49,725 $ 17,403.752nd Yr 32% $ 79,560 $ 27,8463rd Yr 19.2% $ 47,736 $ 16,707.64th Yr 11.5% $ 28,591.87 $ 10,007.155th Yr 11.5% $ 28,591.87 $ 10,007.156th Yr 5.8% $ 14,420.25 $ 5,047.08

• Operation & Maintenance Costs: 0.25%($ 732)• Avoided Energy: unit energy cost* Annual energy

produce

For 1st Year- $ 13,747.36

NET PRESENT VALUE(NPV) MODEL

DIFFERENT SCENARIOS

• Scenario 1: (Conservative)

Simple Pay Back 15.9 years

Cash flow over loan term

$ 41,987.06

NPV -$5,872.19

• Scenario 2: (Likely)

Simple Pay Back 5.6 years

Cash flow over loan term

$ 270,936.45

NPV $ 199,956.18

• Scenario 3: (Optimistic)

Simple Pay Back 5.3 years

Cash flow over loan term

$ 292,661.58

NPV $ 234,511.31

Conclusion

• Museum has potential to produce 25% energy from PV system which can be achieved by installing the proposed 65kW PV system.

Questions?