Assessment of the rain and wind climate with focus on wind turbine blade leading edge erosion rate and expected lifetime in Danish Seas

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Our motivation for investigating the rain and wind climate in the Danish Seas is recent news on leading edge erosion on wind turbine blades at several offshore wind farms. The costs related to turbine blade repair are high. In this study we investigate the rain and wind climate at five coastal and three inland weather stations in Denmark. The coastal stations have much higher frequency of heavy rain than inland stations, in high wind conditions. The hypothesis is that leading edge erosion mainly develops during these few extreme events. The leading edge erosion rates and expected lifetime are calculated assuming similar turbines to be in operation at the eight site. The results of two damage increment models show similar results for the coastal stations but differ for two out of three inland sites. The kinetic energy model shows four times high erosion rates at the coastal sites versus the two inland sites. The accumulated rain model shows site independent erosion. The expected life is on average 3 years of the two damage models. The erosion safe mode control, i.e. reduced wind turbine tip speed during extreme rain events, is presented with relative profit from 2.8 to 4.8%.
Original languageEnglish
JournalRenewable Energy
Volume149
Pages (from-to)91-102
Number of pages12
ISSN0960-1481
DOIs
Publication statusPublished - 2020

Keywords

  • Offshore
  • Wind farm
  • Meteorology
  • Erosion safe mode

Cite this

@article{e16d99cef2e44d448c6f44e8536fda9d,
title = "Assessment of the rain and wind climate with focus on wind turbine blade leading edge erosion rate and expected lifetime in Danish Seas",
abstract = "Our motivation for investigating the rain and wind climate in the Danish Seas is recent news on leading edge erosion on wind turbine blades at several offshore wind farms. The costs related to turbine blade repair are high. In this study we investigate the rain and wind climate at five coastal and three inland weather stations in Denmark. The coastal stations have much higher frequency of heavy rain than inland stations, in high wind conditions. The hypothesis is that leading edge erosion mainly develops during these few extreme events. The leading edge erosion rates and expected lifetime are calculated assuming similar turbines to be in operation at the eight site. The results of two damage increment models show similar results for the coastal stations but differ for two out of three inland sites. The kinetic energy model shows four times high erosion rates at the coastal sites versus the two inland sites. The accumulated rain model shows site independent erosion. The expected life is on average 3 years of the two damage models. The erosion safe mode control, i.e. reduced wind turbine tip speed during extreme rain events, is presented with relative profit from 2.8 to 4.8{\%}.",
keywords = "Offshore, Wind farm, Meteorology, Erosion safe mode",
author = "C. Hasager and F. Vejen and Bech, {J. I.} and W.R. Skrzypiński and A.-M. Tilg and M. Nielsen",
year = "2020",
doi = "10.1016/j.renene.2019.12.043",
language = "English",
volume = "149",
pages = "91--102",
journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Pergamon Press",

}

Assessment of the rain and wind climate with focus on wind turbine blade leading edge erosion rate and expected lifetime in Danish Seas. / Hasager, C.; Vejen, F.; Bech, J. I.; Skrzypiński, W.R.; Tilg, A.-M.; Nielsen, M.

In: Renewable Energy, Vol. 149, 2020, p. 91-102.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Assessment of the rain and wind climate with focus on wind turbine blade leading edge erosion rate and expected lifetime in Danish Seas

AU - Hasager, C.

AU - Vejen, F.

AU - Bech, J. I.

AU - Skrzypiński, W.R.

AU - Tilg, A.-M.

AU - Nielsen, M.

PY - 2020

Y1 - 2020

N2 - Our motivation for investigating the rain and wind climate in the Danish Seas is recent news on leading edge erosion on wind turbine blades at several offshore wind farms. The costs related to turbine blade repair are high. In this study we investigate the rain and wind climate at five coastal and three inland weather stations in Denmark. The coastal stations have much higher frequency of heavy rain than inland stations, in high wind conditions. The hypothesis is that leading edge erosion mainly develops during these few extreme events. The leading edge erosion rates and expected lifetime are calculated assuming similar turbines to be in operation at the eight site. The results of two damage increment models show similar results for the coastal stations but differ for two out of three inland sites. The kinetic energy model shows four times high erosion rates at the coastal sites versus the two inland sites. The accumulated rain model shows site independent erosion. The expected life is on average 3 years of the two damage models. The erosion safe mode control, i.e. reduced wind turbine tip speed during extreme rain events, is presented with relative profit from 2.8 to 4.8%.

AB - Our motivation for investigating the rain and wind climate in the Danish Seas is recent news on leading edge erosion on wind turbine blades at several offshore wind farms. The costs related to turbine blade repair are high. In this study we investigate the rain and wind climate at five coastal and three inland weather stations in Denmark. The coastal stations have much higher frequency of heavy rain than inland stations, in high wind conditions. The hypothesis is that leading edge erosion mainly develops during these few extreme events. The leading edge erosion rates and expected lifetime are calculated assuming similar turbines to be in operation at the eight site. The results of two damage increment models show similar results for the coastal stations but differ for two out of three inland sites. The kinetic energy model shows four times high erosion rates at the coastal sites versus the two inland sites. The accumulated rain model shows site independent erosion. The expected life is on average 3 years of the two damage models. The erosion safe mode control, i.e. reduced wind turbine tip speed during extreme rain events, is presented with relative profit from 2.8 to 4.8%.

KW - Offshore

KW - Wind farm

KW - Meteorology

KW - Erosion safe mode

U2 - 10.1016/j.renene.2019.12.043

DO - 10.1016/j.renene.2019.12.043

M3 - Journal article

VL - 149

SP - 91

EP - 102

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -