ee479 -renewable_system_designs,_inc_-_final
DESCRIPTION
Ee479 -renewable_system_designs,_inc_-_finalTRANSCRIPT
Renewable System Designs
Preliminary Proposal for:
Mountain View
Electric Association, Inc.
Proposal Architects:
Marlene HebnerLoren Schwappach
Chris WilliamsonAnthony Santistevan
December 2010
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
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.
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.
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
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.
Plans and Financing
PROJECT SUMMARY
Renewable System DesignsProject Size (MW) 4 avg (15 max)Turbine Model GE 2.5MWNet Capacity Factor (Years 1-20) 27%Total MWh Produced (Years 1-20) 700,000
Total Installed Cost $26.7M
Bond Duration (Years) 15Bond Interest Rate 5.06%Bond Payment (Years 1-15) $2,578,000
O & M (% of revenues) 3%Capital Cost per MWh $60
Project Parameters
Per Wind Turbine Rated Output (MW) 2.5
Number of Wind Turbines 6
Project Life (years) 20
Initial Investment Cost ($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
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
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
Plans and Financing
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
Plans and Financing
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
Project Milestones
One Line Diagram
Underground 34.5kV Bus
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
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.
Project PhasingPhase 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)
Project PhasingPhase 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)
Project PhasingPhase 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.
Project PhasingPhase 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
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 velocity2. The Weibull distribution of the wind velocity,3. Wind shear (and turbulence) of the wind at the turbine
location.
Criteria used in Turbine SelectionAvailability of Wind Power
Location of Wind Farm
Microsoft MapPoint North America 2010Wind Farm Location Results.
Google Map Results of Wind Farm Location:Degrees Minutes and Seconds to Decimal Degrees Equivalent
Availability of Wind Power
This WindrosePlot shows the nominal wind
direction at the site location
Availability of Wind Power
Location of Wind Farm
50m Annual Wind Speeds Map
Approx 6m/s wind speeds at 50m
Availability of Wind Power
Approx 7.5m/s wind speeds at 100m
Location of Wind Farm
100m Annual Wind Speeds Map
Availability of Wind Power
MVEASubstation
MVEA proposed 1 sq. mile lot
Alt MVEA proposed 1 sq. mile lot (Chosen)
Housing
Housing
Site Layout – Option 1
MVEASubstation
Alt MVEA proposed 1 sq. mile lot (Chosen)500 m = Approx 0.31 mi
Access Road
Underground 34.5kV Bus
250m500m
1250m
Distance:
Prevailing Wind Direction
Swept Area
Site Layout – Option 2
Project DevelopmentTurbine 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
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.
Project DevelopmentTurbine Manufacturers Analyzed
Project DevelopmentSelected Wind Turbine Features
Project DevelopmentSelected Wind Turbine Features
Selected Wind Turbine Features
Project DevelopmentSelected Wind Turbine Features
Project DevelopmentSelected Wind Turbine Features
Project Timeline
Gantt Chart
Project DevelopmentConstruction 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
Proposed Project Construction Schedule Summary
TASK / MILESTONETIME ALLOCATED
FOR TASKSTART FINISH
Approx:On-Site
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
Project DevelopmentConstruction Plan
Construction Labor Force Mix (Approximate # Personnel)
ConstructionPhaseProject
Management & Engineers
Field Technical Staff
Skilled Labor & Equip
OperatorsUnskilled Labor Total
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
Project DevelopmentConstruction Plan
Operations and Maintenance Labor ForceIf 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.
Project DevelopmentConstruction Plan
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.
• 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
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
speed
Power
curve data
Energy
curve data
Wind turbine m/s kW MWh
Power capacity per turbine kW 2,500.0 0 0.0
Manufacturer 1 0.0
Model 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
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
GE
Per turbine
GE Wind 2.5xl - 100m
Supporting Documentation
Questions?
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