Ee479 -renewable_system_designs,_inc_-_final

1. Renewable System Designs
Preliminary Proposal for:
Mountain View
Electric Association, Inc.
Proposal Architects:
Marlene Hebner
Loren Schwappach
Chris Williamson
Anthony Santistevan
December 2010

2. Agenda
Topic Presenter
 Introduction & Project Overview Loren Schwappach
 Initial Findings Marlene Hebner
 Plans and Financing Marlene Hebner
 Project Milestones & One-line Diagram Anthony Santistevan
 Permitting and Environmental Baseline Anthony Santistevan
 Project Phasing Marlene Hebner
 Wind Power Availability Research Loren Schwappach
 Site Layout Diagrams Loren Schwappach
 Turbine Selection Criteria Chris Williamson
 Selected Turbine Features Chris Williamson
 Project Timeline & Gantt Chart Anthony Santistevan
 Construction Plan Loren Schwappach
 Supporting Documentation Chris Williamson

3. Introduction
• As an American owned Limited liability company (LLC) Renewable
Systems Design (RSD) has a proven reputation for engineering state of
the art, cost effective renewable energy solutions across the globe.
• Located in downtown Colorado Springs, Renewable Systems
Design has over 12 staff electrical engineers, 22 skilled turbine
technicians, and a large diverse labor force making RSD the #1
renewable energy design firm in the west.
• RSD designs provides large and small scale renewable energy
solutions while controlling operational costs, and enabling owners to
secure low-cost electricity for the future.

4. Project Overview
• Mountain View Electric Association, Inc. is expanding capabilities
in renewable energy generation and has partnered with the Colorado
Department of Energy for installation of a 1 sq. mile Wind Farm Lot
located on MVEA property at 38° 57’N, 104° 39’W.
• Renewable Systems Design (RSD) has been contracted to perform
a feasibility report / preliminary proposal for MVEA for the said
development, construction and future maintenance of the MVEA wind
farm.

5. Project Overview
As agreed MVEA shall provide the following:
1. Paved road access to all construction sites.
2. A maintenance facility, consisting of an on-site building with
workshop and garage space.
3. A substation designed for direct connection to the wind farm.
MVEA requests the wind farm meet the following specifications:
Criteria Specification
Maximum Output Power 12MVA
Planned average output power 4MVA
Output Power 600V, 60Hz, 3phase

6. Initial Findings
• The proposed wind farm will be comprised of six GE 2.5xl (2.5MW) wind
turbines staggered 500m apart on an east west line.
• At Ideal wind speeds the wind farm will produce a maximum of 15MW of
power with an average output of 4MW.
• Each wind turbine will perform voltage and power regulation, and
transfer power to MVEA substation via a Kerite 1000 kcmil 34.5 kV
underground line.
• The total cost for the proposed wind farm is $26.65 M. With an estimated
break even point after 13 years.
• In 20 years the proposed wind farm is estimated to generate
approximately $4.8M in revenue (NPV) with an annual power production of
35,000 MWh.

7. Plans and Financing
PROJECT SUMMARY
Renewable System Designs
Project Size (MW) 4 avg (15 max)
Turbine Model GE 2.5MW
Net Capacity Factor (Years 1-20) 27%
Total MWh Produced (Years 1-20) 700,000
Total Installed Cost $26.7M
Bond Duration (Years) 15
Bond Interest Rate 5.06%
Bond Payment (Years 1-15) $2,578,000
O & M (% of revenues) 3%
Capital Cost per MWh $60

8. Plans and Financing
Project Parameters
Per Wind Turbine Rated Output (MW) 2.5
Number of Wind Turbines 6
Project Life (years) 20
Initial Investment Cost ($M) 26.65
Year construction is completed 2012
Revenue (MWh)
Selling Price of Electricity 40
Green Electricity Premium 30
Total (MWh) 70
Capital Cost
1) Site:
Wind Speed Feasibility Studies 250,000
Permits, Contracts, & Related Fees 33,000
Engineering and Development 595,000
Power line to Grid 258,300
Total ($) 1,136,300
2) Per Wind Turbine:
Base 1,125,000
Crane 60,000
Tower 360,000
Wind Turbine and Blade System 2,400,000
Installation Labor & Training 130,000
Installation Material 50,000
Total ($) 4,125,000

9. Plans and Financing
Operating and Maintenance Expenses
1) Site (per year)
Maintenance Expenses 20,000
Total ($ per year) 20,000
2) Per Wind Turbine (per year)
Inspections 7,000
Cleaning 4,500
Maintenance and Repairs 43,500
Total ($ per year) 55,000
Financing
Annual Compound Interest Rate (%) 5.06
Length of Loan (years) 15
Inflation (%)
Electricity Selling Price Annual Inflation 3
Expense Annual Inflation 3
Incentives
Production Tax Credit ($/kWh) 0.021

10. Plans and Financing
Yearly Net Energy Yield
1) Production Losses (%):
Ice & Cold Temperature Related 3
Grid & Substation 3
Array 0
2) Annual Energy Yield Predictions (MWh):
Gross 40,000
Net 35,000
Maximum Yield (MWh) 75,000
Capacity Factor (%) (Net Yield/Max Yield) 27

11. Plans and Financing

12. Plans and Financing
The following resources provided critical financial planning information
for your proposal:
Colorado Wind POCs:
Mona Newton, Central Regional Representative,
Colorado Governor's Energy Office
Phone: (303) 866-2100
Colorado Anemometer Loan Program:
Contact: Mr. Michael Kostrzewa,
P.E., Director, Colorado Anemometer Loan Program,
Colorado State University
Phone: (970) 491-7709
Colorado Wind Farm Incentive Program:
Program Sponsor: Colorado Department of Local Affairs, Division of Property Taxation
Website:
http://dola.colorado.gov/dpt/state_assessed/docs/2007%20Cost%20Threshold%20memo.pdf

13. Project Milestones
12/17/10 Begin Project
1/13/11 Construction Begins
- All Financing has been completed
- Recommend MVEA begin site preparation
9/26/11 All site preparation must be completed
9/29/11 Begin Wind Turbine Assembly
1/27/12 All construction complete. Begin operational checks
2/9/12 Handover to MVEA for commissioning

14. Project Milestones

15. One Line Diagram
Underground 34.5kV Bus

16. Project Permitting
Project Permitting:
As previously agreed, MVEA will procure /ensure all
permitting and site certification requirements are obtained
by 1/17/11.
Information on Colorado Springs Permits, Applications and
Fees can be obtained at:
http://www.springsgov.com/page.aspx?navid=550

17. Environmental Baseline
Environmental Baseline:
MVEA has ensured that an environmental baseline of the
site was conducted, and the site has been authorized by the
governmental authorities for the proposed Wind Farm.

18. Project Phasing
Phase 1: Initiation and Feasibility
 1a) Determine Project Requirements:
• 4 MW output power required, lifespan of 20yrs.
 1b) Perform Feasibility study:
• Inventory & assessment of risks displayed sufficient wind resource
& grid capacity at site.
 1c) Perform Pre-Energy Analysis:
• 6.8 m/s average wind speed at hub height of 100m
• Wind speed according Weibull distribution function
• Net energy yield of 35,000 MWh (6 GE 2.5xl 100m turbines)
 1d) Plan area for the 4 MW Wind Farm:
• Site Coverage = 1 sq. mile
• Distance between turbines & building etc
• Minimum separation of 500m (for 0% array loss)
 1e) Create investment and operational costs plan:
• Initial investment costs = 26.65M (4.44M*6)
• Yearly operational costs = 450k (75k*6)

19. Project Phasing
Phase 2: Preconstruction
 2a) Environmental permit & noise restrictions
• Completed by MVEA
 2b) Determine grid connection – High voltage level (34.5 kV):
• Each turbine equipped with a transformer
 2c) Perform project financing analysis
 2e) Calculate yearly net energy yield of the 4 MW wind farm:
• Gross energy yield 40,000 MWh
• 0% array losses (turbulence due to distance between adjacent
turbines)
• 3% airfoil losses due to icing and cold weather
• 3% grid losses (electrical losses between turbine switchgear & grid
connection)
• 93.6% availability (typically 97% or greater)
• Net energy yield: 35,000 MWh (total)

20. Project Phasing
Phase 3: Engineering and Construction
All activities from commencement of works to operation of Wind
Farm.
 3a) Ensure access to site & storage facility
• Components shipped to site: foundation anchor, tubular tower
parts, ground ctrl & switchgear, transformer, assembled nacelle,
hub & rotor blades.
 3b) Proceed with Crane Operations
• 600 ton to hoist tower parts, nacelle, & rotor
 3c) Install wind turbines at site.
 3d) Inspect/Take Over Wind Farm after completion of building
and installation.

21. Project Phasing
Phase 4: Operation and Maintenance
 4a) Daily Operation and Maintenance of Wind Farm
• Average Maintenance Service = Approx $75k per turbine per
year = $450k per year.
• Warranty & maintenance become active after commission

22. Criteria used in Turbine Selection
Availability of Wind Power
Available Wind Power:
The amount of energy that a wind turbine can produce is
dependant on the wind regime where it is located and the
efficiency with which it captures the wind.
The wind regime is defined by three characteristics:
1. The average wind velocity
2. The Weibull distribution of the wind velocity,
3. Wind shear (and turbulence) of the wind at the turbine
location.

23. Availability of Wind Power
Microsoft MapPoint North America 2010
Wind Farm Location Results.
Location of Wind Farm
Google Map Results of Wind Farm Location:
Degrees Minutes and Seconds to Decimal Degrees Equivalent

24. Availability of Wind Power
This Windrose
Plot shows the
nominal wind
direction at the
site location

25. Availability of Wind Power
50m Annual Wind Speeds Map
Location of Wind Farm
Approx 6m/s wind speeds at 50m

26. Availability of Wind Power
100m Annual Wind Speeds Map
Location of Wind Farm
Approx 7.5m/s wind speeds at 100m

27. Site Layout – Option 1
Housing
Housing
MVEA proposed 1 sq. mile lot
Alt MVEA proposed 1 sq. mile lot (Chosen)
MVEA
Substation

28. Site Layout – Option 2
Prevailing Wind Direction
MVEA
Substation
Access Road
Underground 34.5kV Bus
Swept Area
Distance:
250m
500m
1250m
500 m = Approx 0.31 mi Alt MVEA proposed 1 sq. mile lot (Chosen)

29. Project Development
Turbine Selection Criteria
Criteria used for turbine selection:
1) Power production at site (nominal wind speeds)
2) Cut-in / Cut-out wind speeds
3) Purchase costs / average maintenance costs
4) Swept area & turbine weight
5) Features
a) Full power conversion providing quality power to the grid.
b) Minimal noise
c) Lifespan
6) Reliability

30. Project Development
Turbine Manufacturers Analyzed
Turbine manufacturers reviewed in our proposal:
(US)
Northern Power Systems:
http://www.northernpower.com/wind-power-products/index.php
*GE:
http://www.gepower.com/prod_serv/products/wind_turbines/en/index.htm
(NON US):
Aeolos:
http://www.windturbinestar.com/
Coemi:
http://www.coemiwindturbines.co.uk/index
*After reviewing turbine performance/features against costs and availability
we choose the GE 2.5MW 100m turbine.

31. Project Development
Selected Wind Turbine Features

32. Project Development
Selected Wind Turbine Features

33. Selected Wind Turbine Features

34. Project Development
Selected Wind Turbine Features

35. Project Development
Selected Wind Turbine Features

36. Project Timeline

37. Gantt Chart

38. Project Development
Construction Plan
The construction of the Mountain View Electric Association Inc. Wind Power Project
will be performed in several stages and will include the following main elements and
activities:
Mountain View Electric Association Inc. Responsibilities:
• Grading of the field construction office area (also used for O&M building)
• Construction of site roads, turn-around areas and crane pads at each wind
turbine location
• Provide substation
• Plant commissioning and energization
Renewable System Designs, Inc. Responsibilities:
• Construction of the turbine tower foundations and transformer pads
• Installation of the electrical collection system – underground and some
overhead lines
• Assembly and erection of the wind turbines

39. Project Development
Construction Plan
Proposed Project Construction Schedule Summary
Approx:
TIME ALLOCATED On-Site
TASK / MILESTONE START FINISH
FOR TASK Manpower for
Task
1 Obtain Site Certification 1 Month TARGET 1/17/11 *MVEA Provided
2 Engineering/Design/Specifications/Surveys 2 Weeks 1/17/11 2/1/11 15
3 Purchase Order to Transport 9 Months 1/17/11 10/16/11 N/A
4 Road Construction 3 Months TARGET 3/15/11 *MVEA Provided
5 Foundations Construction 6 Months TARGET 6/16/11 *MVEA Provided
6 Electrical Collection System Construction 6 Months 2/1/11 8/2/11 30
7 Substation Construction 0 Months N/A Completed *MVEA Provided
8 Wind Turbine Assembly 4 Months 10/17/11 02/15/12 40
9 Plant Energization and Commissioning 0 Months N/A Completed *MVEA Provided
10 Wind Farm Substantial Completion 14 Months TARGET 02/16/12 N/A
11 Construction Clean-Up 2 Weeks 02/16/12 03/02/12 15
TOTAL (Excluding MVEA Manpower) 130

40. Project Development
Construction Plan
Construction Labor Force Mix (Approximate # Personnel)
Project Skilled Labor &
Field Technical
ConstructionPhase Management & Equip Unskilled Labor Total
Staff
Engineers Operators
Engineering/Surveying/Design 6 12 0 0 18
Road Construction *MVEA *MVEA *MVEA *MVEA *MVEA
Foundations Construction * MVEA *MVEA *MVEA *MVEA *MVEA
Electrical Collection System Construction 2 3 23 12 40
Substation Construction N/A N/A N/A N/A N/A
Wind Turbine Assembly and Erection 4 6 15 15 40
Plant Energization and Commisioning *MVEA *MVEA *MVEA *MVEA *MVEA
Construction Clean-Up 1 1 3 10 15
TOTALS (Excluding MVEA Labor) 18 32 56 37 143

41. Project Development
Construction Plan
Operations and Maintenance Labor Force
If Agreed upon the project will be operated and maintained by a team of approximately 10 to 12 on call personnel consisting of
the following staff positions:
Position Number of Personnel
Wind Turbine Site Manager 1
Operations Manager 1
Operating Technitians 6-8
TOTAL 10-12
The Operations and Maintenance (O&M) team will staff the Project during core operating hours 8 hours per day, 5 days per
week, with weekend shifts and extended hours as required. In the event of outages, the system will send alarm messages to
on-call technicians via pager or cell phone to notify them of the outage. The Project will always have a local, on-call local
technician who can respond quickly in the event of any emergency notification or critical outage. Operating technicians will
rotate the duty of being on-call for outages.

42. Supporting Documentation
• Wind power production and cost analysis was calculated
using RETScreen International’s clean energy project
analysis software.
• Average wind speed, availability, and prevailing wind
direction were calculated using the previous 3 years of
data collected at the nearest and best representation of
the site location, the Colorado Springs Airport.
• Wind shear coefficient was calculated using information
gathered from several previous studies and estimated
based on the terrain at the project site.

43. Supporting Documentation
• Underground high voltage cable was selected to avoid
potential damage due to severe weather.
• The Kerite Company’s 35kV URD underground cable was
selected based on the company’s reputation of creating the
most reliable underground cable in the business.
• Kerite’s 1000 kcmil cable was selected based on its rating of
462 A @ 100% load factor.
• 2.5 MW x 6 = 15,000 kVA » 15,000 kVA/34.5 kV = 435 A
• Cost = $61.50/meter x 4,000 meters = $246,000

44. Supporting Documentation
Resource assessment
Resource method Wind speed
Wind speed - annual m/s 4.5
Measured at m 10.0
Wind shear exponent 0.18
Air temperature - annual °C 9.3
Atmospheric pressure - annual kPa 81.1
Wind Power Energy
speed curve data curve data
Wind turbine m/s kW MWh
Power capacity per turbine kW 2,500.0 0 0.0
Manufacturer GE 1 0.0
Model GE Wind 2.5xl - 100m 2 0.0
Number of turbines 6 3 0.0 785.8
Power capacity kW 15,000.0 4 100.0 2,214.4
Hub height m 100.0 6.8 m/s 5 250.0 4,216.3
Rotor diameter per turbine m 100 6 500.0 6,417.7
Swept area per turbine m² 7,854 7 800.0 8,525.4
Energy curve data Custom 8 1,250.0 10,389.1
Shape factor 2.0 9 1,750.0 11,944.3
10 2,100.0 13,163.4
Array losses % 0.0% 11 2,300.0 14,042.2
Airfoil losses % 3.0% 12 2,400.0 14,598.7
Miscellaneous losses % 3.0% 13 2,500.0 14,868.9
Availability % 93.6% 14 2,500.0 14,899.4
15 2,500.0 14,739.8
Per turbine 16 2,500.0
Unadjusted energy production MWh 8,127 17 2,500.0
Pressure coefficient 0.801 18 2,500.0
Temperature coefficient 1.020 19 2,500.0
Gross energy production MWh 6,638 20 2,500.0
Losses coefficient 0.88 21 2,500.0
Specific yield kWh/m² 744 22 2,500.0
Summary 23 2,500.0
Capacity factor % 26.7% 24 2,500.0
Electricity exported to grid MWh 35,075 25 - 30 0.0

45. Questions?

46. References
• Colorado Springs Utilities
Henry Henderson
Pricing and Forecasting Supervisor
(719) 448 4800
• Chase Bank
Matthew Feltener
Small Business Banker
(719) 637 3253
• Colorado Wind:
Mona Newton, Central Regional Representative,
Colorado Governor's Energy Office
Phone: (303) 866-2100
• Colorado Anemometer Loan Program:
Contact: Mr. Michael Kostrzewa,
P.E., Director, Colorado Anemometer Loan Program,
Colorado State University
Phone: (970) 491-7709
• Colorado Wind Farm Incentive Program:
Program Sponsor: Colorado Department of Local Affairs, Division of Property Taxation
Website: http://dola.colorado.gov/dpt/state_assessed/docs/2007%20Cost%20Threshold%20memo.pdf