﻿ Calculation of Altitude Correction Coefficient for mean wind speed by 『Guidelines for Design of Wind Turbine Support Structures and Foundation December 2010』

# Calculation of Altitude Correction Coefficient for mean wind speed by 『Guidelines for Design of Wind Turbine Support Structures and Foundation December 2010』

 1 Hub height：Hh(m) 0≦Hh≦550 2 Graph x：Hh(m),y：Epv - 3 Plot Input Data YesNo - 4 Number of gridlines of Graph x-axis, y-axis -
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## Keyword

Altitude Correction Coefficient for mean wind speed,Hub height

## Reference

[1]：Edited by Takeshi ISHIHARA：『Guidelines for Design of Wind Turbine Support Structures and Foundation December 2010』、Task Committee on Dynamic Analysis and Structural Design of Wind Turbine,Committee of Structural Engineering,Japan Society of Civil Engineers、pp.59-68

## Remarks

・Dsign wind speed：Uh
・Altitude Correction Coefficient for mean wind speed：Epv
・Topographic multiplier for mean wind speed：Etv
・Reference wind speed：V0.※10 minutes average wind speed at 10m above the ground level likely to be exceeded only once in 50 years.
・Hub height：Hh(m)
・Parameter for calculation of Altitude Correction Coefficient for mean wind speed：Zb,ZG,a

5 5 10 10

250 350 450 550

## a

0.1 0.15 0.2 0.27

## Condition of surface around site

・Area with few obstacles like sea surface or lake surface.
・Area with obstacle like farm products such as agricultural area and meadow.
・Area where tree and low layer building, etc. lie scattered.
・Area where a lot of trees and low layer buildings, etc. exist.
・Area where medium layer building becomes main.
・Making Equation Image is powered by CODECOGS

## History

・2011/05/25：Edit Remarks
・2011/05/25：Bug Fix
・2011/05/21：Upload

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