WIND STUDY

A Wind Study is normally used as a part of the Feasibility Study.

The result of the wind studies will be written reports describing the findings.

These will include an analysis and evaluation of the input data,

estimates of the wind climate at hub height for the turbine positions

and estimates of the gross and net (including wake losses) power production of each turbine and of the entire wind farm.

In addition, suggestions for the position of each turbine will be calculated

and possible implications for the modeling accuracy will be evaluated.

An estimate of the overall uncertainty of the results will also be given,

as well as recommendations for any future measurements or assessments.

A typical wind study includes:

1. Site Inspection Mission:

A mission to the site include:

  • Recommendation regarding siting of the measuring mast(s).
  • Site assessment, including terrain surface roughness classification.
  • Identification and inspection of possible nearby relevant long term meteorological stations.
  • Presentation and discussion with local staff regarding mast foundations and erection.
  • Preparation and presentation of a brief mission note with a summary of discussions, findings and agreements at the end of the Site Inspection Mission.

2. Supply of measurement equipment and mast(s)

Design and supply of wind measuring equipment and mast(s)

for the automatic battery powered wind-measuring station(s).

  • All delivered CIF to a port in the country.
  • Supplied with a 1-year defects liability period.
  • Anemometers individually calibrated and approved for the purpose by an accredited . institution
  • Measurement system documentation – technical data and specifications of equipment supplied, including calibration reports.

​3. Supervision of installation, instrumentation and instruction in data collection.


A mission to the site:

  • Introduction to safety aspects and use of safety equipment supplied for working at the mast.
  • Instruction, training and supervision of instrumentation.
  • Instruction and agreements regarding data downloading.

4. Data processing and quality check for 1-year measurement period


For the assumed one-year measurement period, KenTec ApS will provide:

  • Quality check of the data records received.
  • Transformation of digital measurement values to engineering units using the individual calibration values provided with the instruments.
  • At the end of the measurement period to provide time-series of data measured appropriate for the wind resource assessment.

5. Analyses and Reporting:

  • Based on the one-year measurements at the location(s) as well as existing long-term data made available, a wind study and report will be made, including:
  • Study and presentation of the available long-term wind data.
  • Study and presentation of wind statistics of data measured at the location(s).
  • Wind resource assessments at and around the measurement location(s) up to 10 km from the measurement location(s).
  • Results will also be presented in color contour maps
  • Estimation of the Annual Energy Production for a given wind farm at the measurement location(s).
  • Preparation of Final Report.

6. Assumptions and inputs to be provided by the Client

​It is assumed that the Client shall be responsible for providing

the inputs listed below:

  • Arrangements of access to sites to be considered and rights to use land for measurement stations, including all necessary approvals (e.g. by aviation authorities and other relevant authorities).
  • Arrangement of protection against vandalism of measuring stations.
  • Ownership and responsibility for equipment while on site – including covering costs for repair or replacement in cases like theft, damage during transport or erection, vandalism, lightning or other damage.

Preparations for installation of the measurement station(s), including: ​

a) Customs clearance (covering all costs, taxes duties, etc.)

and transportation to site of masts and equipment

b) Local works (e.g. including technical specification, tendering,

contracting, supervision), including:

(1) Clearances
​(2) Fencing ​

(3) Access

(4) Guard house

(5) Construction of mast foundations

Installation of measurement station(s)

(1) Erection of mast(s).
​(2) Instrumentation of mast(s). ​ ​

(3) Operation, guarding, data collection/downloading and data distribution.

d) Assisting workers

  • Provision of topographic maps in a scale between 1:20,000 and 1:50,000 in paper sheets or in digital form.
  • Provision of data from nearby long-term meteorological stations if selected for the study.
  • Local transportation of KenTec staff on missions, including car and driver for site visits.
  • Dismantling of stations and removal of equipment and foundations after completion of the measurement program (all equipment supplied is the property of the Client).

7. Results and Reporting:

A detailed installation report will be prepared by KenTec after the installation.

The result of the studies will be brief written reports describing our findings.

These will include an analysis and evaluation of the input data, estimates

of the wind climate at hub height for the turbine positions and estimates of the gross and net (including wake losses) power production of each turbine and of the entire wind farm.

In addition, ruggedness indices for the wind mast position(s) and for each turbine position will be calculated and possible implications for the modeling accuracy will be evaluated.

An estimate of the overall uncertainty of the results will also be given,

as well as recommendations for any future measurements or assessments.

​Kentec Denmark ApS

​Rosenstien 12

​8800 Viborg

​CVR: 26260477

Mail: mail@kentec.dk​