Due Diligence and Second Opinion
The objective of a Due Diligence / Second Opinion study is typically to give the best estimated expected annual energy production of a proposed wind farm for a party interested in developing and/or financing the wind farm. Many other elements like estimations on operation costs, feasibility etc. can be included.
A study calculation energy production is normally divided into the following three stages:
1. Data collection:
Maps of the area (between 1:10.000 and 1:50.000), containing height contours and basic needs for roughness and obstacle evaluation (for roughness at 5-20 km distance a 1:100.000 map is preferable). Then we need the layout of wind farm (if proposed – we can also design/optimise layout), WTG type and hub height. Finally, measured wind data at the site (if available, best as time series) and/or long-term wind data from a reference meteorological station in the region.
2. Site inspection:
Depending on the information received, a site inspection normally will be required in order to verify the maps of the area, assign roughness values as well as local obstacles. During the inspection, the location of the wind farm (proposed), local wind measurement masts, if any and meteorological reference stations will be evaluated.
3: Calculation of the expected energy yield:
On basis of the information gathered, the WindPRO program (normally using WAsP as calculation engine) is used to calculate the expected annual energy production of the wind farm. Several types of calculation models can be applied depending on the information available and the type of terrain.
Upon completion of the energy calculations, the results will be presented in a study report, which normally includes the following details:
- An estimated annual energy production of the project, including array losses and several other key figures
- An estimation of the uncertainty.
- A description of the wind farm, details of the turbines: type, power curves and thrust coefficient curves, incl. evaluation of the quality of the power curve.
- Comprehensive analyses of the local wind measurements (if any), correlation to long term reference meteorological station and analyses of the calculated wind energy levels by testing towards other sources, both wind measurements and production from existing WTGs in the region, if any.
As developers of the world's leading software package for project design and planning of wind energy projects and through our intensive consultancy work, EMD knows the possible pitfalls of project development and we are able to supply you with a report, which is based on the latest calculation standards and methods within the wind energy business.
For the last 15 years, we have built up a very solid knowledge base through our wind consultant team, who annually perform 100-200 consultancy jobs – large and small - on different wind energy projects worldwide. A special field, where we consider ourselves in front is in adding information from other wind data sources as NCAR data or actual yield from existing WTGs in the region.
More international banks consider the calculations performed by EMD bankable.Our independence from manufacturers, authorities, banks, etc. guarantees you a high degree of seriousness. Any information send to us are kept strictly confidential and is not disclosed to any third party.
The typical costs for a Due Diligence / Second Opinion study incl. Site inspection (in Europe) are around € 8 - 10,000 (assumed all needed data is delivered free of charge). Delivery time for the report is approx. 2 – 3 weeks.
Please do not hesitate to contact us for further information, and a tailor-made offer according to your requirements.
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Tel.: +45 9635 4444 Fax: +45 9635 4446 E-mail: emd@emd.dk